I bought a 2020 gmc with the 3.0 Duramax new 2 1/2 years ago. At 50,000 miles it was using one quart every 1,000 miles and around that time the check engine light came on. Took two dealerships two weeks to decide it was the cam chains. 90+ days later I got my truck back. Said that that wouldn’t...
I have a Duramax 3.0 in my 2020 GMC Sierra with 58,000 miles. It's had 58000 miles on it for 40 days and counting and putting on no more because it's been in the shop since July.
Engine light came on and first dealer said it was wiring harness. It wasn't. Second dealer say's timing chains are...