S10 Blazer

Check Engine Light and Erratic Gauge Operation on Chevrolet S10 Blazer

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: 200,000 (200,000–200,000)
5 model years affected: 1990, 1991, 1992, 1993, more1994
9 people reported this problem
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Electrical portion of ignition switch failed once before. The truck would idle roughly or just die when fuel gauge read under a quarter of a tank. This time the truck will not start. Ignition switch will have to be replaced again. Only 40,000 miles since previous replacement.