: 2007 Silverado - Highly functional until it breaks

10-31-08, 04:43 AM
Edmunds endured multiple transmission failures and repeated repairs including a rebuild that failed to resolve the original issue.


10-31-08, 08:09 AM
Hmmm...weird. We don't see a whole lot of Tranny failures on the 07+ Silveradoes here at Southview, but we do see a lot of oil consumption with these redesigned 5.3L V8s, especially in Suburbans.

10-31-08, 08:24 AM
Hmmm haven't seen any GMC's in my service department with this issue. My mom had trouble with her '01 Yukon XL having a failed transmission at 36k miles. Hopefully her '08 Denali XL doesn't have the same issues, though she does have the 5yr/100k warranty.

10-31-08, 11:02 AM
That would be a 4L60E or 4L65E, most if not all shift hard when cold due to line pressure.
If the dealer had not messed with the 2-3 shift parts, it would have been fine.

The transmission locked up on me during a 2-3 shift, that is what the dealer messed with.
I don't think I have ridden in a 4L65E truck that you couldn't feel the shifts. Good line pressure, good clutch engament for towing hauling. Soft shift? Less line pressure, a little clutch slippage, not good for a 5500 lbs truck.
Sounds like Edmunds wants a car and not truck.
No doubt the 4L60E 65E is not GMs best transmission but there are tons out there that are trouble free.

10-31-08, 12:50 PM
especially considering the 4L60-E is behind many LS1 and LT1s making big power...

Definitely mom's '02 Sierra Denali with the 65 you can feel the shifts, but man is it good at pulling a trailer! Way better than the '08 F150 (XLT 5.4) that i used last time. And the GMC has 75,000 more miles on it.