Exactly! I thought it was dumb as well, turns out, that's the way it really should be.

there's an old retired GM engineer somewhere who was responsible for that under-the-hood filler, watching these videos, shaking his head.

I bet they moved the DEF filler to be next to the filler neck because most people buying a 3/4 - 1 ton can't see over the fenders anymore.

I became a fan of stanadyne back when I was replacing the 6.5L injection pumps on a daily basis and GM recommended adding that to the fuel at that time.

Thanks for the comment and glad you enjoyed it !do you buy the delco additive at a dealer or in bulk on line?

I buy it from the dealer where I got my truck. I stocked up April of 2022 and list price at the time was 19.36 per bottle, I was able to get it for 15.49 per @ 24 bottles. I'm actually going today to stock back up on additive, oil, and oil filters. I've only bought GM recommended products for my maintenance from the original dealer. I've never really shopped around, but I should. Any recommendations?

Side note, since I got the truck new in late 2019 I was being charged full list price for all service products from the dealer until last year. Then the tech at the parts dept started giving me a discount, hopefully he's still able to hook me up when I go today!

I agree, there should be a locking cap just to keep those people from causing intentional harm.

Are you sure the DEF tank was full from the dealer when new? My HD was about 5/8 full from the factory and the dealer 'assured' me they topped of fuel and DEF. They didn't.

Glad you liked it ! haha, gotta play it safe !

@@DemonWorks out of curiosity, what would be the approximate cost to repair/replace all that. Tks

It could lessen, but at the same time, would result in a longer crank/start, I would assume and then people would be unhappy.

@@DemonWorks truth in what you say.

Agreed. My Mercedes diesel didn’t really like the HSS either. I went back to using the OptiLube. The engine likes that better

@@bryceweaver8211 optilube fan here.

Awesome info ! Greatly appreciate you sharing your findings !

Amsoil diesel additive keeps my mpg 26 to 34 mpg in city 28 to 38mpg highway

Using a high quality additive is more for protecting the fuel delivery and emissions systems from poor quality fuel, not necessarily to improve fuel economy. That's why I use them anyway.

I use Hotshot EDT, gm has their own recommendation. LZ0 pump is the smae.

Sure is !

Sucks to hear this happened to you ! Sounds like you got off on the cheaper end, while still pricey. The truck repaired got everything brand new and yes, the ac delco fuel additive was used afterwards. Glad the videos help share the knowledge and experience !

How much did this mistake cost you? I did the same thing last night

In my area, my total cost was 2,573.48 and I considered myself fortunate for that because all the forums I looked at said that it was anywhere from 5k, 10k and more. My girls truck has been running fine since that day it was fixed. Hope this helps and good luck on your truck brother.

There is a huge chance you can save it (the fuel system). You need to get the gasoline out asap, flush everything out that you can and a fresh fuel filter or two, fresh diesel fuel and some cleaner/additive in there and run it as much as you can. Gasoline is not as corrosive as DEF, thankfully, but it will cause damage if not fixer almost immediately.

I am going to add it to the description as well, thanks for asking ! amzn.to/3YQlDWI

suppose to put this in every tank?@@DemonWorks

@@Dyerboi333 that’s what it says in the owners manual … quite costly. The hotshots edt linked in the description is a much better value for an additive.

Great question! I run a cap on mine, I much prefer it there to keep contaminants out like when going through a car wash and the fuel door blows open … I also like it there to block me when filling with def in case I make an error while being distracted… as far as warranty goes, if the part caused a failure, then yes that part could be not warrantable.

Mine is a green rubber cap which states "Diesel Fuel Only" so as to eliminate any confusion...

I was concerned the cap was holding the filler flap open. I removed the o-ring so I could fully seat the cap, and yes it presses the filler flap open. I put the o-ring back on and do not fully seat the cap when installing it.

@@TakeDeadAimpart name? Link ?

yes, exactly.

I do not, sorry

you got lucky on that one and that's great !

I’m using DEF at truck stops, I think what can help is if owners would buy a cap from Amazon and develop a routine- open cap take care of diesel, put cap on, same with DEF. GM moved the Def side by side in 2022 for the refresh for sure. It has a cap the diesel is cap less. Accidents happen, as the video shows. Expensive lesson.

Use the DEF that is convenient for you. Some like the pumps, others prefer the bottles so they can have it on them. I use the delco DEF or I will buy a box or two from Costco. I don't use the pumps, just by choice to stay out of those lanes and leave them open for the big truck drivers.

It’s timed.

@@DemonWorks well thats one i havent heard in a while for a common rail pump, very interesting! do you know the extra technical details on why it has to? like does it matter for rail pressure distribution vs injector pressure drop or harmonics maybe?

@@Velkanis it keeps a good balance of pressure in the rail during the firing sequence. Started in the 6.6 Duramax.

​@@DemonWorks aahhh makes a lot more sense now considering the L5P started life with a HP4 with what i guess is 2 pressure heads? not sure since ive never been able to see one of those in person as no one imports them here little do i actually know about those... appreciated and thanks for the quick responses!

False. I get that question a lot.

Stanadyne is great! GM actually used to recommend using that when I was replacing the injection pumps in the old 6.5L Diesels.

Thanks! Good enough for me.

Hey thanks ! First time i've seen / received that ! Much appreciated ! The info I can find on the radio stuff is limited, however, there is a bulletin that recently came out and it says: A new radio software update has been released via an Over-the Air-Update. Customer will receive a Software Update notification once the software has been downloaded to their vehicle. Customers need to accept the OTA when prompted. A new radio software update, version Y167, was also released to service for vehicles equipped with Infotainment system RPO IOK being brought into the service department. In addition to providing general robustness and stability enhancements, this update includes all enhancements from previous software version releases. Along with the vehicles mentioned above, vehicles in unconnected markets, and fleet customers may need the dealer to reprogram the radio with the new software package. Y167 Most Notable Improvements Important: Improvements will vary by model, build configuration, system, and sales region. Not all vehicles have all features. Most notable improvements contained in this release may include: Radio: AM or FM station stuck for an ignition cycle No rear view camera After performing a factory reset the physical Home button might not work Intermittent XM unavailable message Intermittent no audio at startup The volume bar pop-up screen might not show when adjusting the volume Voice recognition might not work When trying to sign in with a GM account the sign in through Mobil App does not work Latitude gauge goes up and down Tune knob might not change channels Customer is unable to add XM favorites Voice volumes will not change, only audio volume does The Now Playing screen might not show the station number of the channel playing When changing Favorite pages the > button does not highlight when pressed When trying to log in with a myGMC account, there is no error if the email format is incorrect In the towing app the wrong vehicle type is shown Intermittently there will be no audio Buckle to Drive might always be on Intermittent rebooting with Device is Starting message XM favorite channels jump when using the SWC Improve readability of MyBrand application XM can only play one channel, the rest show Unavailable in the browse list XM favorites are greyed out Invisible Trailer View Not Functioning When adding a new user there may be multiple blank screen Phone: CarPlay might stop after ending a call When switching audio from Bluetooth to USB the Bluetooth audio might continue The Add Phone button might not work When making a call, the Search Contacts screen might come up instead of the keypad Android Auto screen slow at launch The First to Connect setting might not save after an ignition cycle CarPlay would not launch Contacts still show after clearing phone numbers After shutting the vehicle off the Handset button for moving an active call is not highlighted Phone calls might have audio echo on the other end of the call (not in vehicle) Phone projection may not connect CarPlay might be slow to launch IPC: The incorrect language might show on the DIC Dyno Page graph not updating while idling V-mode shown in Drive mode of non-Cadillac vehicles In the Drive Mode pages there is Z-mode when it shouldn't be The sound for the turn signals is out of sync with the cluster indicators Intermittently "Turn your vehicle on" shows on ICS even with vehicle on OTA: An Over-The-Air update might take a power cycle to complete There is a black screen if the back button is pressed while performing an update

Unsure what exactly the Over The Air update contained versus what an actual dealer programming event would be, but I hope this helps somewhat.

@@DemonWorks that's great. Thank you. I love that GM is updating these trucks, I just like to know what they are fixing/improving. The radio has gone full volume on me 3 different times when using the steering wheel controls. I try to turn it down and can't turn it down fast enough to keep it moving down. It seems to last for about 10 to 15 seconds. Was hoping one of these updates fixes that. Thanks!

Unless your towing you better have jugs with you, I thought the same thing until a long tow and went through two tanks in a day

That's the truth ! They newer they get, the more def they drink ! I've been lucky enough to tow somewhat close, so just a 5 gallon splash is all that's needed.

Tow, it was dead.

Definitely look closely at fuel quality / condition. Verify fuel filter cap and housing don’t show any abnormal residue as well. Assuming the truck is all stock.

Not sure what you are asking? If they are good? Yes, they are, in my opinion, unsure why there was no mention of it in that portion of the manual.

@@DemonWorks I just did not know if GM did not recommend it since it did not say Delco on the label.

I drive where it is cold sometimes. I am in the foothills of the Great Smokey Mountains.

unknown how much exactly, but it doesn't take much, unfortunately.

I have one that is out of my way, but if I am in the area, I fill up there.

What about Love’s or QuickTrip?

I checked a month ago and it was available by the case only.

Weird. I asked my guys, and they told me they used to have it in stock, but haven’t carried it in ages. The parts guy looked up the stuff and said they have no part number for it in the system. They asked the diesel techs and apparently the diesel tech told them them I don’t need it. Maybe all our fuel meets top tier standards in Canada so it’s not needed? I don’t know… 🤷‍♂️

@@R3lycthe parts guy at my southern Ontario dealership looked at me like I had 3 nipples when I asked about the additives. Most of our shells have two levels of diesel. I personally fill up at the local coop. Every dump truck from all the local pits fill up there. And the school busses. I have to assume they are selling fresh fuel all the time.

@@toddbunnett640 to be clear top tier isn’t a grade of fuel, it’s a fuel standard that the fuel is made to. Shells uses it, some others might as well, it should say on the pump if they use top tier. That said I fill up at the Petro pass truck stop. All their fuel pumps have a filter and water fuel separator on the pump, they are regularly changed. I also like the truck stops because they typically high volume resale points.

I believe the manual suggested every tank fill. If I add any additive, it is more like every other tank fill or two.

@@DemonWorks thank you new to diesels and your helping the learning curve

I use the EDT from hot shot secret treatment every time I fill up. Then use their cleaner every oil change. Also change fuel filter at 50% life according to the on board computer. Looking at the VSE fuel system saver now that I seen it on here. Solid Looking product.

@@DemonWorks I have been curious how often people are adding it also, i think your right gm mentioned every fill up. I couldn’t see spending that much money on there additive every fill up so I have decided 1 bottle every oil change is going to have to do. curious what is reasonable because every fill up just isn’t to me.

Great share ! I really enjoy Tim and the guests he gets on his channel.

I was ready to cringe if he said CP4! 😂

Honestly, I am not informed well enough on renewable diesel so I cannot give my opinion. It is something I will look into more and learn about.

ugh, that is frustrating.

Flow !!!!!

Yes ! some have issues, much like any other brand, I share the good and the bad...

20K on a 2021, crossed fingers no problems so far.

@@vinny2195 very good!

74k on my 2020 and no issues so far....

yes, very !

To prime the system … if it did not do it, there would likely be an additional second or two of cranking and people would lose their minds. More so than a self priming fuel system.