Just joined the 2021 Yukon lifter group

[DuraYuk]

Good Luck! I tried everything under the sun to get my other side replaced. I even sent a 4 page letter (conversation log included) to the Executive Support team in Michigan (addressed directly to the GM's North American President - forget the name).

As expected, they did nothing!

That's how warranty work is. They can only replace what's broken. Can't replace things just because.

 

[Shrubs2K2]

That's how warranty work is. They can only replace what's broken. Can't replace things just because.

Known issue with plenty of precedence out there. From my perspective it's not a matter of "if" but "when".

 

[DuraYuk]

Known issue with plenty of precedence out there. From my perspective it's not a matter of "if" but "when".

You could say the same for a lot of things. Doesn't matter. Has to be broke to get fixed under warranty...period.

 

[Shrubs2K2]

Disagree for my vehicle.

 

[mnemonicmark]

Thank you

Shrubs2K2 and DuraYuk.​

The car is still at the shop — 2 weeks now. Good news is that GMC will replace all lifters and the camshaft without cost to me. I was offered to replace the spark plugs while everything is apart to save the labor cost and agreed.

I am attaching another photo of the passive(!!) lifter that is wrecked — it was not the passive active lifter on 3 that failed...

Thank you again for your comments!

/M

 

[Billy Bass]

Ii have a 2021 GMC Yukon SLT with the 5.3 and 10 speed auto. I heard if you put transmission in L9 it stays in V-8 mode.

 

[tom3]

Any time I'm cruising around town I do that too. I don't like feeling those four cylinders lugging when lightly accelerating. I've read that that puts those cylinders at near 100% load. Loading up the engine like that should be for eyeball flattening fun I think.

 

[WalleyeMikeIII]

Any time I'm cruising around town I do that too. I don't like feeling those four cylinders lugging when lightly accelerating. I've read that that puts those cylinders at near 100% load. Loading up the engine like that should be for eyeball flattening fun I think.

Note, in @mnemonicmark’s case he said the passive lifter failed…so in his case, DFM delete would have done nothing…

 

[Geotrash]

Thank you

Shrubs2K2 and DuraYuk.​

The car is still at the shop — 2 weeks now. Good news is that GMC will replace all lifters and the camshaft without cost to me. I was offered to replace the spark plugs while everything is apart to save the labor cost and agreed.

I am attaching another photo of the passive(!!) lifter that is wrecked — it was not the passive active lifter on 3 that failed...

Thank you again for your comments!

/M

Wow! That looks like spalling caused by poor lubrication, to my eye. Did they offer any hypothesis as to why it failed?

 

[pa31p]

You can L9 all you want (as do I to eliminate DFM vibration) but the problematic parts are what they are. L9 won’t solve that.