Two problems related to automatic transmission have been reported for the 1998 GMC Sierra 1500. The most recently reported issues are listed below.
While driving through a stop light I heard and felt a metallic bang. The transmission dropped into 1st gear and wouldn't shift up. I lost reverse too.
Transmission shop stated he has seen many failures with this model. Keeps new parts in stock and ready for more to come.
| Automatic Transmission problems | |
| Power Train Driveline problems |