1990 Pontiac Bonneville Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Pontiac Bonneville

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The mode and temperature door actuators may fail causing improper air flow or temperature output from the heating and AC (HVAC) system.

The intake manifold gaskets can develop external engine oil or coolant leaks. The intake manifold will need to be removed and the gaskets replaced to correct this issue. In some cases the plastic intake manifold my be damaged requiring replacement.

The mass air flow or crankshaft position sensor may fail causing the engine to stall intermittently. Proper diagnoses will be necessary to determine the cause of any stalling condition.

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I had this car for 10 years. It gets me back and forth where I need to go. Bonneville is a solid vehicle purrs at 30 mph and a comfortable car. Living in Wisconsin hasn't rust or corroded so happy with that. At 115,778 miles use Lightweight oil 1000miles change spark plugs between (60,000-75,000miles) very classy car running cond. Believe it or not its a '90 model but looks like a 2015 model ye...

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