WR9762

Visited the dealer in my other car on Monday. Explained what happened, what I knew about it, and what I needed (the truck fixed and a loaner). This dealership normally has 300 cars on the lot, is down to 30. The service manager was waiting on three loaners that were "on the way". While I was standing them, the sales guy I bought the truck through said that they were unloading the loaners that very minute. They had me get the truck towed through the warranty's roadside assistance. The service manager said the latest bulletin on this is that if the truck falls under a certain VIN range (built between 9/20202 and 1/2021) or has less than 8,000 miles, GM says to rebuild both sides of the engine, not just the side with the faulty lifter/s. I guess they want to avoid more buybacks and lemon law complaints. Since my truck fell under both conditions (built in October of 2020 and had less than 6,500 miles on it), he was able to get the parts I need quickly (should be here in a week). The tech foreman is the one who does these rebuilds and he's done about 3 in the last week. Some of them were waiting were waiting on parts for 6-8 weeks a while back (older with more miles on them presumably). ETA to have my truck back is the end of next week. I'm glad they found a loaner for me, the car rental places are charging insane rates and none of them have many cars anyway since they sold off most of their fleets during Covid to stay afloat.

I posted this in a similar thread here, but just started having this same issue in my 2021 RST (5.3l V8) bought in March of this year. Started running rough and misfiring yesterday on the way home. Could hear the knocking in the engine (thinking it was a stuck lifter or valve issue because that's what it feels/sounds like). Turned it on today and engine is still running rough. After idling for about a minute, I got the Service Parking Brake and Service ESC messages with the traction control light. Calling dealer tomorrow. I know stuff happens. Machines aren't perfect. Factories mess up. Humans make mistakes. But I will ride the dealer and GM hard over loss of the use of the truck while it's repaired or waiting on pazrts. It sounds like I could be without the truck for a while if the availability of parts is an issue.

Just started having this same issue in my 2021 RST (5.3l V8) bought in March of this year. Started running rough and misfiring yesterday on the way home. Could hear the knocking in the engine (thinking it was a stuck lifter or valve issue). The knock/tick increases in speed as the RPMs go up (and coasting with no gas pedal input stops the ticking). Parked it in front of the garage and checked the oil. It's due for a change (14% oil life left at about 6,500 miles, so first change). Oil is dirty and dark, as expected, but nothing that should be super sludgy. Turned it on today and engine is still running rough. After idling for about a minute, I got the Service Parking Brake and Service ESC messages with the traction control light. Calling dealer tomorrow.