Check Engine Light and Erratic Gauge Operation on GMC S15 Jimmy

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 150,000 (150,000–150,000)
2 model years affected: 1990, 1991
3 people reported this problem
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Car stalls at idle or high speed. replaced fuel pump, catalytic converter, fuel tank, etc... Still stalls but starts right up again.