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.

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Known Problems

The spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.

Brake fluid can become dirty and may cause problems in the brake system; it should be flushed every 60,000 miles.

Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.

A coolant leak may develop from the water pump. This can result in an engine overheating condition. A leaking water pump will require replacement.

A loose or worn gas cap or a faulty catalytic converter are two common items which can cause Check Engine Light to illuminate.

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.

You may be able to prevent transmission problems by servicing the transmission and inspecting the fluid every 30,000 miles. If the fluid is dark or burned, the transmission system should be completely flushed.