The Truth About Disabling DFM/AFM - What You NEED to Know!

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Жыл бұрын

Sharing my experience with disabling DFM/AFM using the manual shift method. I incorporate some of the sentiment shared on this video from 1 year ago : • FREE DFM & AFM Disable...
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Пікірлер: 389

@Donslife Жыл бұрын

Check out my sponsor LetsGetChecked trylgc.com/donslife Use Code DONSLIFE for 25% off your home test kit linktr.ee/donslife - Links to all of my products and discounts

@SKANK_HUNT49 5 ай бұрын

Does your truck have the 6.2 L engine

@Donslife 5 ай бұрын

@@SKANK_HUNT49 yes it does

@SKANK_HUNT49 5 ай бұрын

@Donslife ty so just lock out 10th gear and it will fire on all 8 cylinders?

@WJr_88 11 ай бұрын

L9 works on the 2023 Silverado 1500 5.3 V8! I tested it today to and from work. Managed to get close to 22mpg with speeds up to 62mph. No vibration, no weird sounds, and no transmission weirdness!

@Donslife 11 ай бұрын

Thank you for the update! The viewers will appreciate it!

@markmanning5683 Жыл бұрын

I purchased a Pulsar LT a year ago, totally happy with the purchase. I wish GM would cancel the Autostop and DFM in their motors.

@brandonwelton8165 Жыл бұрын

I did the same and I love it!

@insideoutsideupsidedown2218 Жыл бұрын

The auto stop in my 2020 trail boss has an on/off button.

@davejones3170 Жыл бұрын

Our government makes manufacturers reach high mileage requirements.

@heavychevy8994 Жыл бұрын

Does it still work? I'm from Germany and I recently bought a 2022 Chevy Trailboss with the 5.3 l / 10 speed engine and I heard from the problems with the lifters. So I think about to buy the Pulsar LT to avoid this. I'm a bit concerned...

@robp418 Жыл бұрын

@@insideoutsideupsidedown2218 my 2019 does too, but you have to push it every time you get in the truck. Pulsar disables it permanently

@encker2 Жыл бұрын

Thanks for the follow up on this after a year of changing your driving pattern and sharing your experience of using L9 around town for an extended period of time.

@Donslife Жыл бұрын

For sure!

@amacoutdoors Жыл бұрын

Appreciate your videos Don! Always great clear info!

@joegiles6397 2 ай бұрын

Excellent video! Thanks! I’ll be looking for all your future videos!

@jojojack4975 5 ай бұрын

Just watched this video. I have a pulsar LT, and I've been using it for over a year now with no negative effects . As far as shifting back in and out of manual mode to L9. That's just something I personally don't want to mess with. I like most of your mods and I'm in the process of doing several on them to my 2020 GMC 1500 Texas Addition. I'm not interested in doing a full exhaust I'm just doing a muffler, and looking for a good pair of quad tips that doesn't take the bank to buy. Keep up the good work. I really enjoy all your videos.

@hardball107 2 ай бұрын

I did this also, as for mileage with my Silverado I've seen more variation depending if I had a headwind or not. My transmission temps down the hiway did increase to just over 200*, not really a good idea but not a deal breaker either. As for extending the life of the lifters it will. The lifter collapses when it unlatches and gets stuck in that position, if it never shifts it doesn't get stuck. Because of that I installed a AFM/DOD eliminator to check operation. It was 50 bucks, plugged into the ALDL port on my truck and works great. No more shifting cylinders, the trans runs over 15* cooler running down the hiway and it shifts much better with no lag waiting for a proper engine state to complete a shift. You can run around in manual mode but for the minimal cost the plug in mod it works very well for me and I don't have to think about anything except much better performance.

@jnich17 3 ай бұрын

Don, I really enjoy your videos. They are very real life improvement and very informative. Keep them coming.

@Donslife 3 ай бұрын

Thanks, will do!

@predator-1 6 ай бұрын

I have a 2020 with the 5.3 8-speed. Shifting to L7 does NOT disable the DFM on mine. It still dropped cylinders. Finally broke down and purchased the Pulsar LT. Well worth the money to no longer hear the choppy sound of the DFM. As an added bonus my exhaust has a spectacular sounding gurgle thru my flowmaster while slowing down with it disabled.

@cthorn2467 9 ай бұрын

Great video very informative. I use this also in my 2012 Silverado. But I am taking it to a shop that will do a AFM disable through an HP tuner then I’ll be able to use six gear again, I believe my gas mileage will be almost as good as if it used AFM.

@sferg9582 10 ай бұрын

From what I've heard, once the lifter has "deactivated" and has been commanded to go back into use, is where the problem exists. They drop out and won't come back without some damage being done to the lifter, getting stuck and damaging the cam. my thought is that if you prevent the lifters from going relaxed in the first place, it lessens the chances of effing up.

@edscorsese 8 ай бұрын

Doesn't the problem exist when they are constantly having to work in different driving conditions?? Is it a "damned if you do and damned if you don't" scenario?

@sferg9582 8 ай бұрын

@@edscorsese It could be, but I think that if you're going to have something activating and deactivating hundreds or thousands of times a day that eventually it's going to fail. If you don't work the device, it's less likely to screw up.

@stuartcraig6381 4 ай бұрын

I’m a mechanic by trade but been in the collision industry last few years. I can’t picture how they have lifters set to deactivate. Seems like it would be on a compression stroke maybe the exaust would stay open? I don’t get it. I’ll have to see some videos of it mechanically working I guess

@kevinthomas2906 12 күн бұрын

@@sferg9582seems once it's deactivated it's permanent unless you remove the disabler.

@erichurt9884 Жыл бұрын

Always helpful!!!!!!!

@Donslife Жыл бұрын

Anytime!

@rosskroeber6157 9 ай бұрын

I've tried the L9 selection method for disabling the DFM in my 2023 Yukon XL and it appears to work as advertised. However, because my daily driving includes both town & country (highway) roads, I'm not sure how fast I should be driving before it becomes detrimental to the engine and should be switched back to the Drive mode. I'd like to purchase a Range Technology Plug & Play AFM/DFM Active Fuel Management Disabler; however, they don't yet make one for the 2023 GMC Yukon XL. 😕

@countryboy_71 Жыл бұрын

Hey Don! Thank you so much for representing the true north so well. I have a 2021 Sierra 1500 Elevation with the 5.3. I wish I was still blissfully ignorant to this issue but recent issues and codes are seeing my truck head to the dealer for service. I’ll find out tomorrow or early next week if this is my issue. I’m wondering though, since you did this about 9 months ago, are you still running around town in L9 and what has your longer term experience been? I’ve also been considering the Pulsar. If my problem isn’t actually lifters it may be beneficial for me to consider either of these options in the hopes of saving trouble later!

@Mr6384 6 ай бұрын

Great video. I bought a 22 Silverado, and it told to me that unlike the previous models, the newer engine didn’t just go from 8-4. The dealer told me that, with my 8 speed transmission, the deactivation could do any of 18 different modes, including dropping to only 2 cylinders. Now, I kept that truck about 18 moths, and found it to be very good at handling whatever was needed. After helping one friend with moving his belongings (including towing a car) from VA beach to Jax, we could tell when it was dropping down to 4 cylinders, due to my after market exhaust. What really truly impressed me though was driving from Tri Cities Tennessee out to Palm Springs to tow home a 1978 Thunderbird Diamond Jubilee edition. On straight runs, and running

@greghale717 5 ай бұрын

How are you telling that the truck dropped down to 2 cylinders? I don't know of any indicator that says whether DFM is active, let alone how many cylinders it has dropped down to.

@Mr6384 5 ай бұрын

@@greghale717 I just did some research bc I could hear the different tones from the engine. Plus the dealer had told me to be aware

@DJ-yf6xl 4 ай бұрын

Two cylinders? 😮 wow, learn something new everyday. That was a good read. Thanks for the info. Enjoy!

@walterkuenzle6204 Жыл бұрын

Thanks Don for this very informative video. I was wondering about everything that you were telling us about. Specially the info on driving in L9 to avoid lifter failure. I just experienced this problem in the last month. I had to have all of the left bank lifters replaced on my 2020 GMC Sierra Elevation 5.3 liter because of lifter failure. I only have 12,500 miles on the truck so it was still under warranty and GM covered the cost. So when I found your first video on driving in L9 and how it might avoid lifter failure I was very happy. Now, after hearing what you said that it would not prevent lifter failure I not very happy😢. Thanks again for the information I do appreciate it. 👍

@Donslife Жыл бұрын

Ya it has been a learning experience for me too. Subpar components can fail anytime. Thank you for watching!

@TB-xx4gc Жыл бұрын

@@Donslife So, then, I'm going to assume you no longer suggest switching to L9? If it's accurate to say that it is only a matter of time before the lifters fail, then I'd rather run it in D and let the failure begin while my truck remains under warranty rather than delaying the inevitable and getting stuck with a repair bill after the expiration of warranty.

@crusher0427 Күн бұрын

The products, such as the Range Disabler, help with lifter failure. In fact, my GM tech told me the lifters fail because they're not in use. Of course, that was an off-the-record comment, but I trust his opinion since he sees so many of these issues at the dealer.

@tp2315 6 ай бұрын

I’d love be to know if my rumble on decel at 25-30mph is DFM, VVT, or torque converter. Does it M7 and M8. 2020 5.3 8-speed. So many systems cause similar problems.

@goldrush7293 Жыл бұрын

My 2021 Silverado was built during the chip shortage. It was built without DFM. I get 22 mpg. 5.3. True V8. No problems at all

@Nectaris73 Жыл бұрын

How would one know if their 21 has the dfm chip or not?

@goldrush7293 Жыл бұрын

@@Nectaris73 it was on my build sheet. I forget the exact code but it would be on it.

@joeadaszynski6671 10 ай бұрын

@@Nectaris73RPO YK9

@ImNotHereToArgueFacts 5 ай бұрын

😂

@user-uc9px1iu2m 6 ай бұрын

I do a lot of travel in the mountains here in Oregon and oftentimes have to use the L gears when coming off the mountains behind slower traffic and not relying quite so much on the brakes. I didn’t realize I could switch to manual L7 (I have the 8 speed) while at a standstill. Thanks for that tip!

@WJr_88 11 ай бұрын

I just purchased a 2023 Silverado RST 5.3 I will see if this works in it and update you tomorrow!

@user-id2mh7cm3i Ай бұрын

Very helpful!!!! Coming from a tacoma to a new silverado I was not aware of this issue

@Donslife Ай бұрын

Right on

@KrazyKajun602 3 ай бұрын

My truck is a 2008 GMC Sierra 1500 5.3. My display is manual lettering no digital. I recently got the Engine code of P3400 Cylinder 1 deactivaton solenoid. I don't see a way to disable AFM.

@michaelpanacheese604 Жыл бұрын

Great review 👏 👌

@Donslife Жыл бұрын

Thanks 🙏🏻

@acek100 Жыл бұрын

My 2019 Gmc Sierra 1500 elevation has a 6 speed tranny but says on manual that L4 is the highest it goes and on 10 speed L7 the highest. Manual must be wrong cause I can get it too L6 would like too know the correct info on these trannys

@yandropc4288 7 ай бұрын

hola muy buen video gracia, tengo una 2022 Yukon 6.2 y me preocupaba ese tema del DFM, ya se que hacer gracias por compartir la información

@Tanbody5 Жыл бұрын

I appreciate your videos. If only I had known that L9 trick before I bought a pulsar LT

@Donslife Жыл бұрын

If your using the PulsarLT for other features it has, then it might be worth it

@karlschauff7989 7 ай бұрын

It's been common knowledge. Guys have been using manual move to disable it since at least 2014.

@Tom-ic7hw Жыл бұрын

I can go pretty fast around town and back Roads what kind of speed can you go in 5th gear in a 6 speed or 9th in a 10 speed........or 7 of 8

@Synwright Жыл бұрын

We are about to receive our 2023 1500 Sierra 6.2/10 speed. Though we are not happy about the DFM. Thank you for the follow-up video. Your truck sounds so good. I'm sure you did a video on your after-market exhaust, I'll look for it in your playlist. Was curious what you had installed. Thanks again ✌️out.

@Donslife Жыл бұрын

Nice 👍🏼 Here is the video : BORLA S-Type Cat Back Dual Exhaust Install Review 2019 - 2021 GMC Sierra Chevy Silverado 6.2L kzfaq.info/get/bejne/ouCanNOJs6yVhYE.html

@mptorecon Жыл бұрын

Outstanding!

@Donslife Жыл бұрын

Thank you! Cheers!

@kevincoyle7835 8 ай бұрын

Will that work on a 2024 Chevrolet high Country with a 6.2L in all three driving modes?

@lymanmartin5806 10 ай бұрын

They do sell a full delect kit for this it replaces the cam, lifter pushrods.

@Donslife 10 ай бұрын

Cool, who is offering it. I’d like to know more

@KW-kn2cr 3 ай бұрын

Chevy 2007 5.3 with 94k miles has excess oil consumption (1 qt per 900miles) Some theory is AFM may be partial to blame,,, as well as the valve cover oil passages being the prominent issue. What are your thoughts on AFM in relation to oil consumption? TIA, Keith

@odieslc Жыл бұрын

Hey Don, I've been binging your videos today because it's cold outside today 25F. Yeah,yeah,I know that's a heat wave for y'all in Canada. Anyway, I was wondering if the street sign at the 3 minute mark is a "Watch for Squatch" sign?

@Donslife Жыл бұрын

Hit those like buttons! 😂 The crosswalk sign does look like that. I can’t unsee it

@Chief_187 Жыл бұрын

I had 2014 with afm. Bought Range AFM disabler. It kept my SILVERAYDO in V8. I read up on it before purchasing, and some said that they lost a couple of miles some said that they stayed the same and very few said they gained couple as I did. But in all everyone one was happy with the purchase. At the time it was $200. I’m sure it’s gone up a little but it’s something to look into. They do have one for DFM.

@Donslife Жыл бұрын

For the newer V8s with 10spd transmissions, the PulsarLT is the only plug-in option. It is $500+ depending on where you are and ordering it from. The install is a little more involved but still DIY

@Chief_187 Жыл бұрын

@@Donslife right on a buddy of mine bought a 2022 Sierra I was telling him about it so looked it up to verify if it worked for DFM ( it’s says it does on the range website ). Also looked for it on here and nothing for range DFM but pulsar LT. Thanks for the clarification, bud.

@crspcritter 6 ай бұрын

Got the range in my 17’ 5.3 Silverado. Seeing 1 mile less mpg . Very minimal -

@derekb.miller3457 Жыл бұрын

At 3:20 in this video I’m on the same page as you. Before my muffler delete mileage was up. Now with some good V8 noise mileage is down lol. Letting my 6.2L sing 🔊🔊

@haydendenard2693 Ай бұрын

I could try to explain it to you but if youre not a mechanic you wouldnt understand why deactivating dfm will absolutely prolong if not completely prevent lifter failure dfm lifters have 2 seperate oil passages its hard to explain but basically the part of the lifter that allows it intentionally to collapse to deactivate it by deactivating it you arent working that part of the lifter which means again you greatly reduce if not eliminate possible failure people really dont understand how they actually work and the best thing you can do if youre not going to do it the right way and do a full mechanical delete then you atleast need to get a tune that completely deactivates it

@johnaragon3314 Жыл бұрын

Good video as always. I got the Pulsar LT and love it!! You should get one. Thanks!!

@Donslife Жыл бұрын

When I buy larger diameter tires 🛞

@zacholen1397 Жыл бұрын

@@Donslife What brand and size tires are you thinking about getting?

@davidbrugman2171 4 ай бұрын

I have 08 Silverado. Installed a A F M disabled. It has a 6 speed. 350k did pretty good. Changed oil religiously. Did pretty good...But it has worn out not only collapsed inner spring loaded but camshaft to. Very expensive repair. Love the truck. Other wise. Very dependable. 👍🏻 5.3 by the way

@jimk2988 19 күн бұрын

Can’t complain too much with 350k

@joeadaszynski6671 10 ай бұрын

Hey Don, question for you. In 2021 because of chip shortage, GM weren’t able to install afm/dfm on silverados/sierras after March (RPO YK9). Some say this is the “Unicorn” to search for and all your problems are solved. Others say the components are all still built in, just that the chip isn’t there to activate the system. So likely the crappy lifters will still fail. Was looking at a 2021 Silverado with RPO YK9 (no afm) locally and was excited, but now I’m not so sure. Any help is appreciated👍🏼

@karlschauff7989 7 ай бұрын

Lifters can't fail if they never unlock. As long as they stayed locked, which they will since the chip isn't there to unlock them, they aren't going to collapse. So no, the "crappy lifters" will not "still fail".

@marv730 7 ай бұрын

I was excited about this as well when I bought my 2022 . However, my truck still came with the dfm enabled along with the heated seats and steering wheel that it was supposed to retrofitted for. I just had lifter failure last week at 43k

@bppro1 Жыл бұрын

Hey Don I have a 2019 Trail boss LT. I saw all your videos especially the AFM/DFM stuff. So I have been using manual mode, but mine only goes up to L8?

@Donslife Жыл бұрын

That means you have the 8 speed transmission, so L7 would be your L9 equivalent option

@bmobuell Жыл бұрын

Do you notice when in L9 when coming to a stop it has a harsh downshift right before you come to a stop ? In D, it gives an engine/exhaust surge, but it’s only noise. The feel and shifting is smooth. In L9 the decel exhaust noise is great, but the last downshift before full stop is noticeable to me. Wondered your experience. Lastly is your column shifter loose feeling when in D. Mine has “slop” up and down. Thanks Great videos !!

@dannydukes5 Жыл бұрын

I can confirm my 2020 TB has slop in D, it bounces when I hit a bump! My 2016 never did that

@marksimon1210 4 ай бұрын

Question is if you are changing these parameters around and then take the truck back for service work at the dealership will these codes show up ? Will the dealership try & void warranty based on changing those parameters ?

@Donslife 4 ай бұрын

No you are using the powertrain in accordance with the owner’s manual. Nothing has been modified.

@retiredperson4054 9 ай бұрын

Hey Don ---- Should I delete the AFM/DOD? I just purchased a 2012 Silverado 1500 5.3 with 120K miles -- It is a very clean truck that I believe was well maintained. Would you suggest I get a RANGE Technologies disable plug in OB2? Will the fact that these 5.3 with AFM have higher pressure oil pump cause issues and perhaps create excessive oil burning if the Disable device is used? Also would you recommend installing an OIL Catch Can along with a Range OB2 device?

@Donslife 9 ай бұрын

I would consider doing both on a 2012, but ultimately it is your decision. I like that the AFM disable on the 2012 is less invasive and easily removed if needed compared to the PulsarLT option for mine.

@lawnmowermanTX 4 ай бұрын

I have a 2013 Avalanche Black Diamond 5.3 liter engine and I don’t have the mechanical experience to disable the AFM DoD fuel thing.. Should I trade in my mechanical fragile substandard Avalanche for a Kia? Nobody in Texas knows about it and refuses to help me fix my Avalanche..

@rayphoto7358 Жыл бұрын

Thanks for explanation Don!!! I was looking for that. I do see and feel the difference. My truck 2019 5.3L HC and gas mileage went from 18.7 to 20, 21.2 on average. Don….what is your opinion regarding Pulsar LT vs Cold air intake? I was looking to get better throttle respond. Is it better to get Pulsar or Cold Air intake? To use Pulsar …is it cancels Cruise Control….is it true? Thanks! Love your vids! ✌️👍

@user-ug6fy8yb4n 4 ай бұрын

I have found and plan to purchase a 2014 Silverado High Country with the 6.2L. Is manual mode available (L5 on the 6-speed) and, if so, is a separate AFM/DFM disabler necessary? Thanks.

@Donslife 4 ай бұрын

Manual mode will work in L5 to disable DFM. You do not need to purchase another device unless you want DFM disabled when in L6 or Drive.

@terryhammer9493 Жыл бұрын

The pulsar will lt work with my cadillac escalade 2015 6.2l? I'm looking to delete the AFM I know the range technology plug and play would work but the pulsar has a tune with it I like that any insight on my best options would be greatly appreciated thanks.

@terryhammer9493 Жыл бұрын

@@elmerfudd3102 thank you for the information 🤙

@salvadorvalles9744 Жыл бұрын

Hey Don, I’ll be driving cross country this summer. Is it worth driving in L9 for 1k plus miles? Or should I just leave it in D the entire time? Going from Texas to Florida and back. Thanks

@Donslife Жыл бұрын

Personally I would leave it in D ‘Drive’ for long durations over 50mph otherwise your rpm’s will be higher sitting in 9th gear

@kevinborovsky3558 Жыл бұрын

Hi Don I have exact same truck as yours year, Color, options. I hate the auto shut off/start, and DFM. Your videos have been most helpful. Cheers from Ontario

@Donslife Жыл бұрын

Happy to be of service

@joshr19821 4 ай бұрын

What aftermarket Device would you recommend to take care of auto stop and DFM? I know there is the pulsar device but dang 600 bucks is steep. Any other options? I would rather not go to L9

@Donslife 4 ай бұрын

You could try this: Auto Start Stop Eliminator / Bypass GMC Sierra AT4. Full Review and Installation! kzfaq.info/get/bejne/fK2hZZh2l8y2h4k.html

@MADMAX353 6 ай бұрын

Very informative....thank you.

@Donslife 6 ай бұрын

Glad it was helpful!

@itsjustjonnoh 5 ай бұрын

I just bought a 2024 Sierra 1500 elevation w/ dfm. Very helpful stuff. I love the truck but this is definitely something I’ll keep an eye on. I’ll prob drive on L9 to be safe, but also turn off the auto start/stop. Seems like this is the only worry with these trucks. Better than other defects with other trucks in my opinion. Anything else I could do to help prevent any dfm issues?

@Donslife 5 ай бұрын

When your transmission is in L9, auto stop/start is deactivated too. Some claim that more frequent oil changes can only help too.

@itsjustjonnoh 5 ай бұрын

@@Donslife good to know. Thank you. I was driving in D today and i have an on/off button on my stop/start. Any time i drive in D I just turn that off too. Pretty smooth to be honest. I don’t feel any jump when i drive or lack of power. I’m gonna read the manual more when i get some time. Might start making videos about the truck also. Not many people on KZfaq that I see have these trucks.

@MrDutch1e Жыл бұрын

I don't have DFM and my lifters have gone twice in 1st 6000km. So I doubt disabling it matters at all.

@DustinKeating-yk3vq 3 ай бұрын

I just bought a 07 Silverado i didn't know anything about afm so when u found out i got sick to my stomach but come to find out the previous owner had did a complete afm delete he did the lifters push rods cam shaft also he got rid of vvt so i dont never got to worry about liter failing because it doesn't have arm lifters no more that god

@brianf4420 Жыл бұрын

When I shift into L it shifts to the next lower gear that it was in D in. If I'm in 10 it will shift to L9

@markwiegand9334 Ай бұрын

I used the system for over a year. Used a full tank of fuel over my normal driving week on average. Then started using L9 mode to prevent it activating. Started using only a half a tank of fuel during my normal driving week. Tested this by again using the system again a full tank a week. Went back to L9 moded again only a half a tank of fuel a week. I now only use L9 mode in my silverado. This is every day normal weekly driving. I haven't tested it for long distance freeway mileage. This is just my normal every day driving.

@cujo7240 5 ай бұрын

So do you just drive around in L9 regardless of speed, or do you shift through all the manual gears?

@Donslife 5 ай бұрын

L9 all the time, no shifting at all. The only time I shift back to Drive is if I am going to be on the highway for a road trip. Around the city, 100% L9

@tylers.2069 4 ай бұрын

The number next to the L is the top gear you want the trans to go to. Like if you are towing something. You don’t want it to go into 10th because it’s an extra overdrive. Basically means that every time you touch the pedal, it will shift. Lowering the top gear while towing will lower your amount of gear hunting at higher speeds and keep you in a better power band.

@edwinhermanson8842 7 ай бұрын

If it doesn't help lifter failure then why did the trucks without the V4 mode not have the issue with lifters and cams ? Or did they ??

@Donslife 7 ай бұрын

The V8’s have had cases since 2007. Not all versions had V4 icons to display when AFM was active either.

@crlaw75 11 ай бұрын

I've read the '23 Chevrolet Colorado and GMC Canyon have this feature on their 2.7 litre engines, so I'll keep this in mind.

@karlschauff7989 7 ай бұрын

The way cylinder deactivation works on a DOHC engine is totally different compared to a pushrod OHV engine. That isn't to say it will be reliable. Even Honda has had issues due to their use of cylinder deactivation.

@rougebaba3887 6 ай бұрын

How do I turn off the DFM/AFM in my 2016 GMC Sierra 6 speed? I do not have "L" option on the shifter. Does anyone know?

@Donslife 6 ай бұрын

Shift to M5

@rougebaba3887 6 ай бұрын

@@Donslife great! Thank you... Just tried it and the thing feels like I actually have a V-8 finally.

@speck6451 2 ай бұрын

I have a 23 Escalade and you have a DFM delete module for your truck but do you have one for Mrs. Donslife truck and if so were did you purchase it from

@Donslife Ай бұрын

I don’t have a DFM disabler for either vehicle. We can shift to L9 and it works fine. As for which to buy, Pulsar LT is the most compatible with 6.2’s and the 10 speed transmission.

@keithschnick5831 Жыл бұрын

I have a 2018 1500 5.3 had the DFM turned off by a tuner I know locally and it now gets 23 mpg while running all 8 cylinders.

@gerardolopez5875 8 ай бұрын

How much charge?$$???

@wotysgtb4348 Жыл бұрын

A little confused. At the 8:20 mark you mention when pulling heavy loads, you leave it in "D" because it needs all the power it can get and not de-activating cylinders. Would it not be better to put it in L9 (Disabling DFM) so you get all 8 cylinders instead ??

@Donslife Жыл бұрын

The statement is meant when towing at highway speeds. I like having access to my 10th gear. Otherwise, yes, towing around town L9 would be fine

@DroneShotFPV Жыл бұрын

my 2017 50th Anniversary 2SS Camaro doesn't work this way. I have an 8 speed, and in manual mode, if I am in "M7" if my RPM's drop to a certain point when cruising it will actually still drop to V4 mode. I ordered a RANGE disabler... Now, I will say that if I leave it in an even lower gear it will mostly stay in V8 mode, but not just 1 gear down. at 55 - 60 MPH I have been running in about 5th gear or so, which is a higher rev (around 2800 RPM etc) and it will stay in V8 mode.

@davidmalaterre9341 5 ай бұрын

What speed were you at in this video?

@joelpierce3940 4 ай бұрын

So, I have a 2022 AT4, 6.2 and I don’t think it has AFM/DFM, as I don’t have a message. I wonder if due to parts, chip shortage mine doesn’t have it? Any idea. It has Autostop but I push the button and turn it off.

@DKLabs99 4 ай бұрын

If you have your window sticker it should tell you there’s a credit of like $150 for not having that in your truck. They did it in 2021, not sure how far or if they went into 2022 as well

@toncar3003 Ай бұрын

What about driving in sport mode it kicks into lower gear? Does that help to disable activate fuel management. I feel that it runs better in sport mode.

@Donslife Ай бұрын

Unfortunately no, it will still engage, but likely just less cylinders will deactivate in sport

@beanlittle_8702 2 ай бұрын

so how fast can i drive with L9 ?? ive got a 2019 6.2

@brooktroutangler5917 3 ай бұрын

If DFM is off in L9.... that would tax the lifters much less over time and in theory make them last longer no?

@francof6383 Жыл бұрын

is this truck a good daily driver I'm gonna be looking at a 2021 at4 6.2 used tomorrow

@Donslife Жыл бұрын

Mine is good for my needs and used for truck activities

@williamhig75 Жыл бұрын

PLEASE READ ME!!!! Hey Don great video! I also wanted to take the time to add the following. Chester makes a lot of sense how the DFM works, but one thing I personally think that where all overlooking is the Auto stop/ start. You may ask why? Here's why I think when I bought brand new my GMG 1500 Sierra Denali crew cab 4×4 5.3 liter short bed. I'm a heavy hitter speed demon that is and all my vehicles I have put them through a good amount of speed and I have the tickets to show for em🤣. One thing I right away noticed when I took the truck for my 1st time cruise the truck went into AS/S mode at the light and I gunned it hesitated by a sec. Or 2 so I did research how to deactivate it and it showed me in the Manuel ever since then I never had issues other then getting frustrated with pressing buttons so eventually I canceled it with a pulsar. My truck has 21,000 miles and running strong of course I use synthetic oil, premium fuel, and has mods which yes I know that doesn't help but I maintain my truck to my driving ability! We all have that one triggeeing foot to gun it at the light but I think that feature by the time it responds to the take off, the lifters and valves don't respond to people's reaction time at light and makes that 1sec or 2 enough to cause a bent valve! That's my opinion on the As/S system. Sorry to make this long...... awesome channel!🤘😎🤘

@Donslife Жыл бұрын

One of the first things I did! Auto Start Stop Eliminator / Bypass GMC Sierra AT4. Full Review and Installation! kzfaq.info/get/bejne/fK2hZZh2l8y2h4k.html

@williamhig75 Жыл бұрын

@@Donslife see and your truck has been running on point! Just something I think really is the problem.

@garyvickery6097 2 ай бұрын

I have a 2013 Silverado Lt 5.3. I bought it used with 160k on it. At about 170k I had my first misfire on cylinder 7. I changed the plugs( #7 was burnt to a crisp). I didn't have any problems till about 190k and in one week I had 2 more misfires on cylinder #7 . At this point I did some research and found your video and applied your method to my every day driving and I'm at 200k and haven't had a misfire since. I get in put the trunk in Manuel and shift to 5th gear and pullout. no issues whatsoever. I also have done a muffler delete and still no issues to date.

@Donslife 2 ай бұрын

Thanks for sharing

@RiveRRatt75 9 ай бұрын

I used the Range Tech to disable my fuel management system on my 2015 until I did the dod delete.

@michaelohara2161 4 ай бұрын

Does a 2018 Chevy Express 2500 passenger 3D van with a 6.0 Ltr have AFM or DFM?

@Donslife 4 ай бұрын

It might not have either. Most likely variable valve timing or VVT

@frank9649 Жыл бұрын

There's a delete kit you can buy and install, also a performance tuner (diablo) for dropping the ecm programming. Never have to worry after that.!

@hockeystop5 Жыл бұрын

The ecm is now locked on the newer GMC/Chevy motors.

@keithschnick5831 Жыл бұрын

@@hockeystop5 HP tuners will get you in, did my '18 when it had 12 miles on it. My boss just had his '23 1500 done loves it.

@hockeystop5 Жыл бұрын

@@keithschnick5831 how do I go about having HP tuners unlocking my ECM?

@ChaklitTea Жыл бұрын

my yukon has a corsa driving in L9 the sound is more consistent the only issue is when I drive over 80 i have to shift either back to D or L10 otherwise the rpm will keep increasing

@Donslife Жыл бұрын

Totally, I do the same and recommend the same. I like it for my for the aftermarket exhaust sound

@nesco7615 Ай бұрын

Can I drive on the freeway. On 5 gear. I do this around town but on the freeway not sure if I should leave it at 5 anybody has a opinion

@Donslife Ай бұрын

You can. I leave it in drive for any significant time on the freeway to keep the RPMs a little lower. Some people leave it in manual mode and say the temps and mileage stay the same

@ryan__james 2 ай бұрын

Hey Don, thank you for all of your videos! I have a 2024 5.3L 10 speed elevation with an aftermarket exhaust and typically drive it in L9 unless going above about 50-60 MPH. It seems to work great. I have read into if driving in L9 most of the time has any downsides apart from *maybe* fuel economy and came across it potentially being harder on the transmission. Is this something you've heard of and are you concerned about it?

@Donslife 2 ай бұрын

Thanks for watching! In my opinion, the transmission is fine. I think towing is way harder on the transmission than using L9. I have not witnessed any real increases in transmission temps either. If anything, not using L9 I would experience some harder low gear shifts both up and down. Not often, but enough to notice.

@ryan__james 2 ай бұрын

@@Donslife Thank you for taking the time to provide a thoughtful response, the insights are very much so appreciated!

@tahoe6182 8 ай бұрын

So it wont stop the cylinder springs from messing up my motor that’s all I want it to do I don’t want to waste money on new motor because of that problem that’s why I was Looking in too this device I don’t car about the sounds it make or anything it was really about the motor

@ryanrichie1731 4 ай бұрын

I have a 2015 GMC Yukon XL and towing my 7k pound camper it will still go back and forth between 4 and 8 if in Drive.

@Donslife 4 ай бұрын

Maybe on deceleration or going down a slight change in grade

@seansnyder4881 Жыл бұрын

I have never seen my 2021 AT4 above L7. It doesnt matter what speed I am at, when I shift to "L" its in L7. Does this make sense?

@Donslife Жыл бұрын

If it doesn’t go to past L8, then I would suspect you have an 8 speed transmission. L7 would turn DFM off. L8 would not disable DFM on an 8 speed transmission

@seansnyder4881 Жыл бұрын

@@Donslife my fault , I should have given more info. 2021 AT4 with 6.2L engine and 10 speed transmission. Seems odd that it is never above gear #7. I like the channel. a lot of good information here. Thanks

@christroester4901 Жыл бұрын

Have you found a dfm disabler compatible with your truck or just driving in L9?

@Donslife Жыл бұрын

I have been using L9 still. PulsarLT is still the only option I know off for plug and play

@cassidym6635 5 ай бұрын

If lifter already failed and been driving for a bit too long should I replace enginev

@Donslife 5 ай бұрын

A mechanic should be able to determine how much damage has been done

@MyMoe9 4 ай бұрын

What would be your recommendation for my 2014 GMC Sierra with a 5.3. Had to have 4 lifters and a bent push rod replaced in May 2023. I also pull a 6500lb travel trailer from time to time. Thanks

@Donslife 4 ай бұрын

I am a big fan of full synthetic oil changes in 3000 mile intervals. I won’t claim that’s the big fix, but I have always done this. Especially if I was towing.

@MyMoe9 4 ай бұрын

@Donslife I do the oil thing but a bit more than 3000mi. Maybe I will change that. GM recommends 7500 I think. But do two filter changes in that time. And last, I believe my transmission is a 6 speed. In the video I believe you say to use m5 around town but stay in drive on the highway and towing. Is that correct? Thanks for your time and help.

@Donslife 4 ай бұрын

@@MyMoe9 personally if towing I keep it in Drive or Tow Haul mode, even while pulling in our out of the city at lower speeds. I think that AFM on a 2014 would stay in v8 mode almost always with a trailer at any speed. 99% of the time anyway. DFM can be all over the map with how many cylinders it chooses to engage.

@JohnKavanaugh Жыл бұрын

Hey Don, stupid question of the day...does this do any good for highway driving? Only city/stop and start? How far on the highway before switching back to D?

@Donslife Жыл бұрын

I put it in Drive when I am going to be doing speeds over 55mph (approximately). That’s roughly where 9th gear ends on the 10 speed transmission on flat ground.

@JohnKavanaugh Жыл бұрын

Thanks! I’ve been running L9 for the last day or so. It is certainly an improvement in town.

@Donslife Жыл бұрын

It’s a game changer with an aftermarket exhaust

@JohnKavanaugh Жыл бұрын

@@Donslife Thanks for this tip. I've run L9 in town now through a full tank of gas. Mixed, more city than highway and I'm getting 15mpg. About a 2 gal improvement. My truck is a 2019 Silverado High Country that is basically stock. The only difference is tires. I've gone with Cooper Discoverer Rugged Trek. Aggressive tread pattern, a little noisy, and eats a couple mpg compared to stock. I watched your video on the towing mirrors and that's the next upgrade. Just have to wait for the camera equipped version. Thanks again!!

@wolfman1371 5 ай бұрын

I am definitely going to try the L9 on my 2024 Chevrolet Silverado. Can you use the L9 when on the highway with speeds up to 70-75 mph?

@Donslife 5 ай бұрын

You can but the rpms will stay a little higher. I shift to D personally at that point and DFM is certainly reactivating.

@wolfman1371 5 ай бұрын

I sure hate that DFM@@Donslife

@horsepowerdriven Жыл бұрын

Don I have a 2022 with a 6.2. I have had a slightly rough idle lately. Have you ever had this problem? Truck only has 2800 miles on it

@Donslife Жыл бұрын

91-93 octane?

@horsepowerdriven Жыл бұрын

@@Donslife 93

@Donslife Жыл бұрын

If it isn’t bad fuel; The easiest check would be a vacuum leak/seal. Check everything looks snug from the throttle body to the air box too. Might be worth having the dealership check it out incase it’s a fuel delivery issue, coil pack, plug, etc. A fuel treatment additive might help with your next fill up too.

@edwardsanchez3801 Жыл бұрын

My 2022 6.2 with less than 30 miles also has a strange idle. Hoping the cheap dealership gas is the issue and goes away when I add premium.

@horsepowerdriven Жыл бұрын

@@edwardsanchez3801 Dealer said nothing is wrong.....lol

@rookiechevey Жыл бұрын

The only problem with running in Manual mode is the lock up torque converter will not lockup because that is the way its programmed.

@oqhr 5 ай бұрын

Man your aftermarket exhaust tone sound awesome. I feel it doesn't sound loud at low-mid RPM, am I correct? Please let me know the exact exhaust setup. Thanks

@Donslife 5 ай бұрын

Thanks! Here is the video: BORLA S-Type Cat Back Dual Exhaust Install Review 2019 - 2023 GMC Sierra Chevy Silverado 6.2L kzfaq.info/get/bejne/ouCanNOJs6yVhYE.html

@Donslife 5 ай бұрын

Here is a link to the exhaust: amzn.to/42M6Jmm

@zaneg6783 4 күн бұрын

Is there a list of the factors that disable or enable DFM any where? Why is it s big secret?

@juanberrios3097 Жыл бұрын

@donslife I was told that driving in L9 could have some negative affects on the transmission because of the change in RPMs versus being in drive… I’ve been driving in L9 99% of the time even in highways and haven’t had any issues. Have you heard of any issues.

@Donslife Жыл бұрын

I have heard some people claim that the downshifts are sometimes odd, but nothing alarming

@larrylucas5731 5 ай бұрын

Thanks!

@jgmullins1 2 ай бұрын

"A bad lifter is a bad lifter. Even with DFM deactivated the lifter will eventually fail". I wanted a GMC Sierra Elevation but I can't buy one with the multiple quality issues of which the lifter issue is at the top. Only real option is a used Tundra prior to the change to the twin turbo mess.

@TheSSkyler Жыл бұрын

Does doing this to disable dfm help oil consumption problem in these engines?

@Donslife Жыл бұрын

Good question, but since I haven’t had issues with excessive oil consumption, I can’t really say. Maybe someone else on this post can answer

@isachar2013 Жыл бұрын

I put 0 miles engine from gm on my 2020 denali and from day 1 has de range technology chip , so we'll see if using 8 cyl all the time improves engine life

@ericbecker1699 Жыл бұрын

How is it working so far?

@marvinholloway5590 Жыл бұрын

I’ve been running my 2019 5.3 in L5 for a year with no issues other than that annoying clicking stops. I always thought it was my transmission

@Bruce991 Жыл бұрын

so it stopped the clicking?

@CarsWithCory Жыл бұрын

Waiting to get my truck back from GM now with bad lifters…. Can’t wait to get out of the 5.3 platform. Selling it as soon as it’s fixed

@user-pk2co9wc1m 4 ай бұрын

5.3is and has been one of best since like 1999’😮

@ram89572 28 күн бұрын

@@user-pk2co9wc1m See the problem with what you're saying is that in 99 the 5.3 didn't have all the extra AFM/DFM/DoD crap in it. So yes they were mechanically much more simple, reliable engines that are still on the road in vast numbers today having never been rebuilt. Once GM introduced the cylinder deactivation their reliability went through the floor because of variable state hydraulic lifters that can collapse and take the cam out causing you to need a serious rebuild that could get you to the $10k mark in repairs. Do you really want to buy a $40k truck that will likely need a $10k engine rebuild within 100k miles? I certainly don't. I recently sold my 2004 Silverado 1500 with the 4.8l V8 to a family member who was in bad need of a truck to work in. So when I buy another truck for myself (currently I can get around using either my primary or backup work van) I'm definitely not going to be buying a GM product specifically because of these engine issues. At this point I'd feel safer with a Ford with a 2.7l ecoboost than I would a GM engine with all the cylinder deactivation crap. I'll probably try to find a nice F150 with the 5.0 in it because at least it didn't have that crap (until either the 23 or 24 MY)

@coff24 27 күн бұрын

Have a question, how do you think exhaust will sound on a 2024 5.3 v8 with DFM ... muffler shop talked me out of installing one because of the Dfm will make it sound horrible, at this time they do not make a disabler for the 2024 10 speed for Chevy

@Donslife 27 күн бұрын

It will sound fine in L9. Are you sure you don’t have an active exhaust on your 2024? It is a new feature they’ve added. I talk about it in one of my more recent videos

@coff24 27 күн бұрын

@@Donslife , I believe I do, what will the difference be with active exhaust

@coff24 27 күн бұрын

@@Donslife can you send me link to that video

@coff24 27 күн бұрын

@@Donslife I do not have active exhaust

@Donslife 26 күн бұрын

Here is that video: Getting Personal! Answering Subscriber Questions! AT4 Mods, New Truck & More! kzfaq.info/get/bejne/ftJiZs2JtZbWpoE.html