2004 Pontiac Bonneville Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2004 Pontiac Bonneville

2004 Pontiac Bonneville Problems

Water Pump May Fail Prematurely

The water pump may develop a coolant leak resulting in an engine overheating condition.

 

Oil Leaks From Lower Engine Area

The engine may develop an oil leak from the lower crankcase portion of the engine block. Our technicians tell us that the engine must be removed from the vehicle to properly repair this oil leak.

Misfire Due to Failed Ignition Coil

An ignition coil may fail causing one of the cylinders to misfire. Each of the two banks of cylinders has its own coil assembly. If one ignition coil fails the coil assembly for the corresponding cylinder bank must be replaced.

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