One problem related to engine cooling system has been reported for the 1999 GMC Sonoma. The most recently reported issues are listed below.
The heater on my vehicle has stopped working and the manufacture (GMC) and the dealership refuse to cover it under warranty. There is a NHTSA bullerin on this (634218). I would like to know how many other vehicles like mine (1999 GMC Sonoma) have experienced this problem.
| Engine Oil Leaking problems | |
| Engine And Engine Cooling problems | |
| Engine Belts And Pulleys problems | |
| Engine Cooling System problems |