MUST DO FREE Silverado/GMC Exhaust Mod!

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MUST DO FREE Silverado/GMC Exhaust Mod!

Рет қаралды 66,834

Күн бұрын

How to make your Silverado or GMC truck sound instantly better by this free exhaust flapper mod.
GM has an active valve in the exhaust for the DOD or displacement on demand function to cancel out the low frequencies of the exhaust. This modification will show you how to hold that valve open all the time so you get all the HORSEPOWER!!!!!
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Пікірлер: 96

@jaybilawchuk2225 4 күн бұрын

Couldn’t believe it. Went to garage last night and sure enough there it was. 2017 Sierra 6.2. This truck has been choking its whole life. THANK YOU!!! 3 years of wondering why the truck hisses when pulling my camper……valve was seized 3/4 shut. Until last night. lol

@EssMotorsports 4 күн бұрын

@@jaybilawchuk2225 No way! Cheap fix! Seized shut, truck will run way better!

@jaybilawchuk2225 4 күн бұрын

@@EssMotorsports I’m hoping. I’m in the rust belt up in central Canada so it must’ve seized at some point. Broke it free and bolted it open. Truck immediately sounded like a truck, thanks to you. 👍👍

@EssMotorsports 4 күн бұрын

@@jaybilawchuk2225 that's awesome! No problem!

@roykeefe4202 4 ай бұрын

Watched this and went right and did it. Thank you sir. Way better! After spending $70k on a new trail boss and $8000 on 6" lift,wheel and tires. There are no beans left for any exhaust mods.

@EssMotorsports 4 ай бұрын

Camera doesn't do it justice. But way better in person. And it's free, can't beat that!

@georgehernandez1502 2 ай бұрын

lol my exact thought. Can you vouch on the better sound? I feel like it was very subtle but idk if it’s worth it

@EssMotorsports 2 ай бұрын

@georgehernandez1502 in my opinion it's worth the minimal effort

@georgehernandez1502 2 ай бұрын

@@EssMotorsports Ty sir. I live in an apartment complex and have been debating straight piping for some time now, but I don’t want my neighbors to complain. Someone did this and put exhaust tape on the resonators and it sounded pretty decent.

@EssMotorsports 2 ай бұрын

@georgehernandez1502 cheap and easy. If u don't like it then remove it. Simple enough to try

@cheeng1 Жыл бұрын

I really liked the back-to-back video clip comparison, really highlights the difference.

@garyallen5297 4 ай бұрын

Use my reciprocating saw cut just before that valve and just behind the stock muffler and clamped me a Borla XR-1 in its place and its got a deep growl sounds great and the Borla won t rust there stainless steel paid $136 on Amazon for the Borla. I put in on my Trail Boss LT sounds great

@georgehernandez1502 2 ай бұрын

Did it get louder or more of a growl? I was thinking of doing that

@johnmalone4101 2 ай бұрын

Did it drone

@ReformedTradesman Жыл бұрын

Just did this yesterday. It surely sounds nice but now i just want it a little louder 😅. I wanna hear it more when i accelerate!

@l_Knights_l 10 ай бұрын

Get you cold air intake and it will growl much louder when you accelerate

@dcrooks Жыл бұрын

Mine was rattling like crazy on cold starts. It would quite down after a few minutes of warming up. I had it cut out and pipe spliced in.

@craig4364 7 ай бұрын

Just did my 2016... Thx solid easy mod

@EssMotorsports 7 ай бұрын

Best FREE upgrade ever!

@wizardindustriesusa 6 ай бұрын

That valve makes an owl sound that I only just identified when you moved it manually. 😂

@c7zftw777 Жыл бұрын

I popped spring off. Opened valve and put spring back on.

@TheShawn3771 Жыл бұрын

Great video, very informative. Love the before and after. You need to dual it.(won't be much louder justa little more rumble) I don't understand gms thought behind a single port. I bought the 20 Z71 LTZ

@kevinspahr6632 6 ай бұрын

Gm's thought is cheaper!! So unless you pay the upgrade, you get the single exhaust...lol.

@fernandocg7859 15 күн бұрын

I'll try it. I like the sound of it. Thanks! 👏🏼 👏🏼

@EssMotorsports 15 күн бұрын

@fernandocg7859 even better in real life 👍

@jimandrews2967 9 ай бұрын

Mine is AHEAD or upstream of the muffler. I wanted to retain that qiietstealth sound of the factory exhaust so I opted for the stainless steel motorized dump valve. It can be loud or quiet when it suits me. I put the dump valve ahead of the flapper valve and used a turndown to blow it to the side of the truck.

@EssMotorsports 9 ай бұрын

Yeah thats a good idea! Even with the flapper open it's still not even loud tho! Haha

@braydennuttall9829 2 ай бұрын

I just dropped the muffler completely, down pipe with a tip. Sounds nicer then this and gets looks and compliments

@yeeyeefishing6819 7 ай бұрын

Great video sir, I'm installing right now and I can't wait to see what happens!

@amd243 Жыл бұрын

Have you had any issues since this mod was done? How did it hold up? Just curious if anything had popped up since. Great video BTW very informative, well edited, and not too long.

@EssMotorsports Жыл бұрын

Zero issues. No rattles nothing. Still sound good too. I'd definitely do it again.

@jonathanbialas988 Жыл бұрын

I think the only problem may be at cruising speed in V4 you may get an exhaust drone which sounds very similar to the 8L90 TCC shudder.

@EssMotorsports Жыл бұрын

@Jonathan Bialas if I really really pay attention with no music. I can hear the helicopter noise in v4. But it's so minor doesn't bother me at all.

@MrChofer26 Жыл бұрын

So is this where the rattling comes from; I hear it randomly but while driving....I want to say low gear/ while going up ramps on freeway and we'll after I got it tuned to stay on V8 mode at all times...and actually I started noticing this after the tune and started getting the error code P-0430 too🤔

@EssMotorsports Жыл бұрын

I don't think this valve would rattle. Sounds like something else. U could always try this trick and see if it does anything.

@scottd8555 Жыл бұрын

I cut it and the stock muffler off and replaced with a Flowmaster delta flow 50 sounds great and still no drone in the cab

@Rollingacres.tv2023 Жыл бұрын

Did you cut the secondary muffle by the tailpipe as well?

@scottd8555 Жыл бұрын

@delcooutdoors4143 not yet but I might still along with installing a tip

@Boobtube. Жыл бұрын

yep, sounds deeper

@DarkRainReaper Жыл бұрын

Or just use a metal hose clamp

@Rollingacres.tv2023 Жыл бұрын

Put a Flowmaster super 44 in my truck tonight and ran into that valve so I left it and it barely changed the sound. If I cut it out and put a peice of pipe in there will that give it the normal effect? Or should I cut the valve and the secondary muffler by the tailpipe as well

@LilDevilBoy 4 ай бұрын

just put an electric downpipe cutout. you'll have loud and quiet with a push of a button.

@Mossman4u2 Ай бұрын

With the value open, you don't hear that hiss sound anymore.

@TheShawn3771 Жыл бұрын

And we CAN here the difference!!

@EssMotorsports Жыл бұрын

On camera it's hard to tell I know. But in reality it does change the tone a lot.

@TheShawn3771 Жыл бұрын

We can tell, that great before and after at the end, back and fourth. Thats what most guys leave out, GREAT VID !

@TimmyTheKitty Жыл бұрын

Seemed louder and more rumble effect before. Idk, maybe it’s just phone mic and speakers being dumb. These type things are a in person thing so can’t really be sure through videos. I’d try it though and see 🤷🏻‍♂️

@EssMotorsports Жыл бұрын

Camera doesn't pick it up. Real life it's deeper. I really like it.

@TimmyTheKitty Жыл бұрын

@@EssMotorsports yeah, I figured. That’s bad thing about videos, it don’t pick up all the sounds cause they usually have noise cancelling mics. It’s worth a try though

@bloodstorm1231 27 күн бұрын

So, you rotate the flapper towards the front of the truck or the rear?

@EssMotorsports 26 күн бұрын

@bloodstorm1231 run the vehicle and watch which way it rotates under normal operation at idle. Then u know which way to rotate it

@PrimePicksel 6 ай бұрын

Im doing this to get rid of the squeaking. My god i hope that engineer was punished. 😂

@EssMotorsports 6 ай бұрын

No real downside from what I've seen

@ryanb6658 5 ай бұрын

Sounded louder first seemed like

@EssMotorsports 5 ай бұрын

My mic was not the best then. Definitely louder and deeper with open valve. Camera didn't pick it up great

@joshuaraffensperger3592 8 ай бұрын

Buy yourself an AFM disable module.

@moejacob 3 ай бұрын

That was the best money I ever spent!

@jeffsmoger8443 Жыл бұрын

I’m not brave enough to do a KZfaq video, if I do- I will probably try to do it like you did. Nicely done. That said… I didn’t catch if you mentioned what engine you have, but I’m guessing that’s not a 6.2. Maybe I should try it out and send it to you. I also don’t think I caught how long your screw was. I have a 21 RST 6.2 and the run up is disappointing to say the least.

@jeffsmoger8443 Жыл бұрын

I bought my wife a 2023 suburban, and it sounds much better than my truck in terms of run up.

@EssMotorsports Жыл бұрын

It is actually the 6.2L. It's noticeably more tone cruising around. I can't recall the screw length. 1" to 1.5" something like that.

@nateaxelson7780 9 ай бұрын

i don’t think it is on the 2011 silverado, i’ve been looking but can’t find it

@EssMotorsports 9 ай бұрын

Yeah idk when a valve was implemented

@jimclifford1241 Жыл бұрын

I have '19 Silverado High Country with a 6.2L. Mine as one valve before the muffler and one after the muffler. Did yours, or did it just one after the muffler?

@EssMotorsports Жыл бұрын

Pretty sure mine was just one after the muffler.

@jimclifford1241 Жыл бұрын

@@EssMotorsports thanks for the reply

@moejacob 3 ай бұрын

6.2 has two and the 5.3 has one. 😁

@EssMotorsports 3 ай бұрын

Just after on mine.

@BRoberts1986 11 ай бұрын

I just checked my 2019 4.3L and it has a round valve with no corners to stick a screw in. Anyone else experience this?

@EssMotorsports 11 ай бұрын

I'd just get a wide clamp, like exhaust band camp and clamp it open.

@kevinspahr6632 6 ай бұрын

Yes. Mine is round also on my 21 5.3. Used a hose clamp to hold it open.

@docgreen81 3 ай бұрын

Any idea how that impacts fuel economy?

@EssMotorsports 3 ай бұрын

It's not going to make a noticeable change. But it it would be better if anything making the exhaust free flowing.

@docgreen81 3 ай бұрын

@@EssMotorsports I'm just upgrading to this from an old Dodge, so like, I miss the growl, but I'm also looking forward to the wildly improved fuel economy. 😄

@IamMugs Жыл бұрын

Have you seen how restrictive it is fully open? Best to chop it out

@EssMotorsports Жыл бұрын

Yeah I've seen pictures online. Not going for max HP on this, for DD it's just enough sound.

@kevinspahr6632 6 ай бұрын

Yes. Looks like there is half a ball mounted on the one side of the flapper...lol

@Shinigami_Kishi 8 ай бұрын

you only did one flap tho i think there is two one on each side

@EssMotorsports 8 ай бұрын

Mine only has one after the muffler

@moejacob 3 ай бұрын

If my memory serves me correctly, the 6.2 will have one before and one after the muffler. The 5.3 will just have one valve.

@just_your_localguard9612 11 ай бұрын

valve? what valve? lol

@uchiha_shisui682 6 ай бұрын

Is this on the 2006 1500 silverado?

@EssMotorsports 6 ай бұрын

2018 1500

@dankrone6691 Жыл бұрын

No different to me.

@EssMotorsports Жыл бұрын

The camera did not pick up the low frequency good at all. There is a definite note change in the exhaust.

@jefjulday Жыл бұрын

Great video and hack. My 2016 6.2l valve is not working as it should, so I'm going to do this hack to try it out... honestly, mine sounds so bad at start-up as well as while driving I thought I had an exhaust leak at first. I may be swapping the mufer as well in the future for a little more rumble. Again, great hack. Glad I found this.

@EssMotorsports Жыл бұрын

@jefjulday Thanks Man! I'm still rocking this mod. To me it's perfect, also helps its free! Haha