One problem related to automatic transmission control module has been reported for the 2009 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 GMC Sierra 1500 based on all problems reported for the 2009 Sierra 1500.
Transmission delay from park to drive. As transmission moves into drive the truck jerks forward violently. Park to reverse did not seem to be a problem. Dealer worked on the truck for approximately 8 hours, flushed transmission, and performed oil change, did not notice any metal in the transmission fluid and sought an update for the tcm (was up-to-date); however, a small amount of water was seen in the oil pan. Dealer performed a test drive and the truck appeared to be back in working condition. Owner attempted to drive the truck out of the dealer lot but the transmission would not engage. Owner attempted to put the truck in reverse, the transmission would not engage. Truck was left at the dealer for further evaluation. No additional information at this time. Transmission still under warranty.
| Power Train problems | |
| Automatic Transmission Control Module problems |