2004 Pontiac GTO Problems
RepairPal has identified the most common problems with the 2004 Pontiac GTO as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.Refine by vehicle
The spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.
A coolant leak may develop from the water pump. This can result in an engine overheating condition. A leaking water pump will require replacement.
One or both secondary air injection check valves may become restricted causing poor air flow resulting in illumination of the Check Engine Light. It is often recommend to replace both check valves even if a fault code is set for only one bank of cylinders. Replacing only one valve may result in a return trip to the repair shop.