1990 GMC S15 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 GMC S15

1990 GMC S15 Problems

Driveability Problems Due to Internal Distributor Fault

The distributor may develop internal faults. This can cause a rough running engine or stalling condition, the Check Engine Light may or may not illuminate. Our technicians tell us that the distributor should be overhauled or replaced to correct this concern.

Oil-soaked spark plug wire rubber boots can cause misfire or rough idle

The spark plug wire rubber boots may get soaked with oil, causing a misfire or rough idle.

Check Engine Light and Erratic Gauge Operation

The electrical contacts in the ignition switch may fail and result in erratic instrument panel gauge operation or illumination of the Check Engine Light. A failed ignition switch will require replacement.

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