2023 Yukon Denali 6.2L Idle Vibration - Normal?

[tj40371]

Hi All. New owner here. Since i first took delivery at 5 miles, I've noticed a intermittent vibration at idle, mostly when stopped at stoplight - felt in seat and floorboard. Like a slight kick.

I've read alot about idle vibrations due to lean mix/low idle speeds for emissions - is this what it is? I have not noticed any other performance issues and the service department did spend an hour test driving/looking it over a couple days after delivery, finding no problems/codes.

Thanks in Advance for any input!

 

[Micahsd]

Sounds pretty typical to me as my 5.3L Tahoe does the same thing most of the time.

I’d make sure you’re using the Premium TopTier gas as yours requires the Premium fuel. Using the TopTier fuel did make mine seem to run a little smoother at idle although it might just be in my head too.

 

[tj40371]

I would swear its related to the low idle but keep reading about fuel injector issues being a new-ish problem. Maybe I'll try a couple tanks of the name brand top tier gas, rather than the place I've been using. I'm only at 1300 miles.

 

[WalleyeMikeIII]

I would swear its related to the low idle but keep reading about fuel injector issues being a new-ish problem. Maybe I'll try a couple tanks of the name brand top tier gas, rather than the place I've been using. I'm only at 1300 miles.

My 6.2 had a little idle stumble when I first got it. I attributed it to potential condensation in the fuel tank since it was shipped from Texas to Minnesota in n February with about 5 gal of gas in it.

After about 600 miles (two tanks) I never noticed it again. I’m at 15k now. Either I’m used to it as a characteristic of the engine, or it’s gone.

 

[R32driver]

I notice a slight stumble in every GM suv or truck. It seems to be pretty normal. Some will say they don't feel it but it is definitely a thing that a lot of these rigs do. I noticed it immediately when test driving our '21 when it had 3 miles on it. Was hoping it wasn't going to be a thing but it is

 

[mkrowland]

I have 2021 Yukon Denali at 43k miles and mine does the same thing. It will typically idle very low at the stoplight (like 100-300 rpm). If I manually rev it to 500-600 rpm it goes away. I took it to the dealer to demonstrate and they said while it does seem low it could be the Active Fuel Management doing its thing. It is bothersome to me though and doesn’t seem right.

 

[WalleyeMikeIII]

I have 2021 Yukon Denali at 43k miles and mine does the same thing. It will typically idle very low at the stoplight (like 100-300 rpm). If I manually rev it to 500-600 rpm it goes away. I took it to the dealer to demonstrate and they said while it does seem low it could be the Active Fuel Management doing its thing. It is bothersome to me though and doesn’t seem right.

I don't think these V8's will run @ 100 RPM...or even 300. If yours is idling that low, you best get it to the dealer. Feel iike the normal Idle is 500 RPM, and even this is low. If you feel a stumble, jitter, etc, suggest take it to deler, you have powertrain warranty to 60k/5years

 

[Chad G 1979]

My trick idles between 500-600 rpms when sitting at a light or parked. When it gets closer to 500 rpms, i can feel a slight shudder. If yours is idlong at 1-300 rpm, it needs checked out. Something is going on.

 

[mpthompson84]

My trick idles between 500-600 rpms when sitting at a light or parked. When it gets closer to 500 rpms, i can feel a slight shudder. If yours is idlong at 1-300 rpm, it needs checked out. Something is going on.

Reviving an old thread here, but my 21 Denali with a 6.2 does the same stumble and kick at idle and it’s driving me absolutely crazy. There’s no reason a vehicle that cost this much money and sold as a luxury vehicle should act like it’s about to stall when it’s at a red light. Mine also idles between 100 and 200 RPMs. At if not slightly below the first notch. Has anyone been able to get GMC to address or fix this? Ive had other vehicles do this and it always turned out to be an ignition m or fuel related issue. Dirty injectors, okugs, etc.

 

[mkrowland]

Reviving an old thread here, but my 21 Denali with a 6.2 does the same stumble and kick at idle and it’s driving me absolutely crazy. There’s no reason a vehicle that cost this much money and sold as a luxury vehicle should act like it’s about to stall when it’s at a red light. Mine also idles between 100 and 200 RPMs. At if not slightly below the first notch. Has anyone been able to get GMC to address or fix this? Ive had other vehicles do this and it always turned out to be an ignition m or fuel related issue. Dirty injectors, okugs, etc.

So, after two visits to the dealer and one software “flash” and one update my low idle problem is gone and the engine idles at 500-700 RPM. I still have the “stumble” at idle especially at a red light but it seems to be less so especially using premium 93 gas verses 91 or when my wife tries to put in 89 octane. At this point I am leaving it as a GM quirk with their trucks but my previous Ford Explorer, Infiniti QX56, and Toyota Sequoia didn’t do it. Otherwise Denali runs fine above idle.