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.
Car problem reports
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Most reported 2004 Pontiac Grand Prix GTP problems
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.
The serpentine belt tensioner pulley may wear out. Our technicians tell us that in order to get a new pulley from General Motors you must purchase a complete belt tensioner assembly.
The fuel pump may fail causing engine to stall and not restart.
The high pressure power steering hose will commonly leak fluid; it should be replaced.
A Loose or worn gas cap may cause Check Engine Light to illuminate.
The steering may develop a clunk type noise from the upper intermediate steering shaft. Our technicians tell us that you should check with your local GM dealer to find out what the latest repair is for this condition.