One problem related to automatic transmission cooler has been reported for the 2007 GMC Sierra. The most recently reported issues are listed below.
The contact owns a 2007 GMC Sierra hd. The contact stated that the transmission lines have been leaking for a couple of months. The dealer was contacted and stated that the warranty did not cover any repairs related to the power train. The contact is concerned that there was no recall for his year, make and model vehicle. The transmission lines have been replaced. The failure mileage was 75,000 and the current mileage was 83,000.
| Power Train problems | |
| Automatic Transmission Cooler problems | |
| Power Train Driveline problems | |
| Transmission Gear Slipping problems |