1999 Pontiac Grand Prix GTP Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1999 Pontiac Grand Prix GTP
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1999 Pontiac Grand Prix GTP ProblemsIntake Manifold Gaskets May Leak Coolant or Engine Oil
The intake manifold gasket may develop and external engine oil or coolant leak. In some cases, an internal coolant leak may occur causing coolant to mix with the engine oil. Running the engine with a coolant/oil mix may result in engine damage. Replacing the intake manifold gasket should correct this issue.
The intake manifold gasket may develop external engine oil leak. The manifold gasket will need to be replaced to correct this issue. RepairPal cannot confirm a recall for this concern on these models.
1999 Pontiac Grand Prix GTP QuestionsHow can we get the obd to read? (1 answer)
We have checked our fuses and switched them out. When we check it with our computer it turns on but when we take it to the emissions we can't get it to read.
so i bought my car used and when i turned on the ac it didnt work till i put it on level 3 and now it wont work till i put it on max. whats the reason for this?
We think we are having tranny issues, and noticed that the HUD scrambles up and down when it is shifting into overdrive.