I have a 2021 Yukon SLT Diesel and it's been in the shop waiting on a Rear Differential for over a months now! It's still under powertrain warranty, which is a good thing but also is screwing me. I could get an aftermarket rear differential today and it would be good to go. But then my warranty will be null and void. GM has pushed back the delivery date of the differential 3 times now. This is completely erroneous. And now the suggested that I the part will be delivered is Feb 4th. I'm getting really fed up with this.
Has anyone had any luck with getting GM to start making parts or how long did it take for you to get a new rear differential?
