K 3500 Truck 4WD V8-454 7.4L VIN J SFI (1996)
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Temperature Gauge: Testing and Inspection
Gauge Reads High
1. Remove lead at sensor, measure resistance using an ohmmeter.
2. At 104 degrees F resistance should be approximately 1200-1350 ohms, and at 125 degrees F resistance should be approximately 53-55 ohms.
3. If resistance is not within specifications, replace sensor.
4. Disconnect lead at sensor and gauge, check for a high resistance using an ohmmeter. Repair wiring if necessary.