tbully
Member
Hello JL -When I first got the Denali with the 8sp I wasn't too happy about it. There was a lag in the accelertation and seems it was always looking for gears. Then it developed a clunk noise during acceleration (1st gear). Dealer said they refered to TSB 4452434 and determine the transmission was bad.. It was replaced few weeks ago and the Denali totally feels like a different vehicle. The clunk is gone and the lag is gone. very smooth shifting.
One of the tech told me the first batch of 8spd tranny had issues.
The dealer loan me a 2015 LT Chevy tahoe with the 6spd. Lets just say I'm sure glad I ended up getting the 6.2 w/8spd.
I don't want to derail this thread too much. Could you double check that TSB again? I couldn't find information on it with a quick search.
Reason being, I'm retaining legal counsel for a few issues I'm having - this being one of the more serious ones. I would like to have this information before I (or my attorney) speaks with GM again.
Thank you!
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