Mobud

So I’ve had both banks of lifters replaced in mine at about 2500 miles. Went another 2500 check engine light came back on supposedly had to relearn the cam shaft position sensor. Lasted two weeks came back on apparently they are waiting for GM to rewrite code but they can’t figure out how to fix the issue and that was a month ago with still no update. Good luck

So I thought too maybe it was bad gas. Took to dealer once had generic 300 code then light flashed again stopped by dealership said it was same code so a tech went and go scan took I had misfires on 1&6 said they’ve had a lot of issue with the lifters collapsing due to a bad batch of parts. So next week they’re replacing all lifters.the tech also said usually by 5000 miles they will fail I’ve got 2700 on mine.

Did switching gas help with the misfire? My 21 Sierra has done it twice now dealer found p300.

I hardly set my parking brake and it does it every time usually not when backing up but just forward until I hit about 15

Haven’t been able to fix the issue yet plan on trading it in quick, mine has steadily gotten worse with no help for my service department

Well let me know if you figure something out. Thanks

Did dealer find anything solution for this or have you?

Anyone found a solution to this? Mine has been doing it for 4 or 5 months getting more frequent. Only does it after sitting at work all day and leaving the garage once I get up to speed it doesn’t do it.