2021 6.2L Yukon Denali Dead Battery Gremlin? Not the truck?

[TheAgency]

Are they chalking up the battery drain issue to the Lifters? Or did you never get the battery issue solved?

The truck has been perfect since the lifters were replaced. They aren't speculating that the lifters influenced/were influenced by the battery, but man, that's an odd coincidence.

Perhaps some of the failed starting caused the lifter's vulnerability to surface.

One other thought on the battery: I have heard Onstar can cause problems. During the battery problems, I had both the 2021 and the 2023 registered in my GMC app. It's possible that either status or commands were being sent to the 2021, sort of "waking it up" but then not actually driving it. Since deleting the 2021 from my app, no issues.

 

[WalleyeMikeIII]

Found this today, refererencing for all who have experienced dead battery:

https://static.nhtsa.gov/odi/tsbs/2024/MC-10251377-0001.pdf

 

[TheAgency]

It's dead again. Pulling the fuse for the hands-free module with more fingers crossed.