CarlJ

anyone else out there had to have their 10 speed Allison replaced on their 2020 3500HD? Mine needs replacing with only 2350 kms (1460 miles).

Have a 2020 GM duramax, 2351 kms and my transmission is shot, has to be replaced. Dealer advised GM will not let them diagnose the problem and a new transmission is being shipped. After doing a bit of research it appears these new 10 speeds have lots of issues, GM needs to step up. After spending almost $100k CAD ($74/ 75k USD) this is BS, GM not only should offer to replace the tranny but should actually provide a new vehicle in my humble opinion. Most other industries provide replacement of their product with such major issues. Am really pissed off at at the moment. No wonder people buy Japanese/ Korean for their overall quality.