2005 Pontiac Grand Prix GTP Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2005 Pontiac Grand Prix GTP

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 mass air flow or crankshaft position sensor may fail causing the engine to intermittently stall. It may be necessary for the engine to cool down before it will restart.

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.

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i noticed when i was flushing my brake lines(i was doing that because i was changing my brakes and calipers and troubleshooting why i had no brakes) that a sensor was unplugged from my master cylinder. i plugged it back in (my master cyl. had been the cause and took it to a local shop (northshor...

My air filter was changed out to accomodate a K&N round filter, before i bought it, and twice i have almost catastrophic random cylinder firing error messages on the the message center. each time i have to pull over shut off the car and sit, then disconnect the battery to reset before contin...

Came on after I changed the water pump

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