any issue with sudden stopping, and shutting off??

Hello, Unfortunately, I have never heard this problem description before. Also, if technicians with hands-on cannot find the issue, anything someone has to say online will be guesswork. See if any of the technicians in their shop have been to the factory hybrid drive training, and, if not, take it to a GMC dealer that has the proper training.

Hi, I have the same problem with my 2008 You know Hybrid. I have taken it to the dealership many times and they can't find the answer. It is getting worse and now I am told I need a new Hybrid battery. GMC charges close to $5000.00 dollars for this service. I can't help but think the stopping was a result of needing a new battery and it should have been fixed while still under warranty.