Problems for specific Pontiac Grand Am years:
Car problem reports
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Most reported 1990 Pontiac Grand Am problems
The heater core under the right side of the dashboard may leak engine coolant which can puddle on the passenger front floor. The loss of coolant may cause an engine overheating condition. Our technicians tell us that removal of the dash board is necessary to replace the heater on these vehicles.
The head light aim may be out of adjustment after replacing one of the head light bulbs, This can be caused by the head light assembly not being correctly installed after bulb replacement.
A door window may move slowly or stop in mid travel due to a failing power window motor. The affected window may start working again after the motor cools off. Replacing the faulty window motor will commonly correct this concern.
The rubber section of an automatic transmission cooler line may develop a fluid leak . In some cases the leaking section of hose can be replaced. In others, the complete cooler line must be replaced to correct this concern.
The engine vacuum hose to the MAP sensor may crack resulting in a vacuum leak causing the engine to run rough and/or stall.
The timing chain tensioner and guides are prone to wear and may develop an abnormal noise, requiring replacement.
The high pressure power steering hose will commonly leak fluid; it should be replaced.
The torque converter clutch can stick "on" after extended freeway driving causing the engine to stall when coming to a stop. Our technicians tell us when this occurs, the engine usually will restart and stall when put into gear. After allowing about twenty minutes for the engine and transmission to cool down, the engine will start and the transmission will operate normally. Replacing the torque converter clutch solenoid, transmission filter, and fluid will generally correct this issue.
The fuel pump may fail causing engine to stall and not restart.