One problem related to automatic transmission cooler has been reported for the 2003 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 GMC Sierra 1500 based on all problems reported for the 2003 Sierra 1500.
While having my vehicle check over for the winter, the mechanic inform me that the front brake lines are very rusty as well as the fuel lines and the cooling lines going to the transmission. This situation is very disturbing since I have very low mileage. The tubing used for the brake as well as the fuel lines should be able to withstand rusting for the life of the vehicle. If the material used by gm was not up to specification as far as corrosion protection either compensation to repair it is in order a recall should be made.
| Power Train problems | |
| Transmission Failure problems | |
| Driveshaft problems | |
| Automatic Transmission Cooler problems | |
| Power Train Driveline problems | |
| Automatic Transmission problems |