TEMPERATURE GAUGE READS HIGH UNDER NORMAL DRIVING CONDITION

Subject: INDICATED OVERHEAT CONDITION

Model and Year: 1990-91 U-VAN

Condition: The engine temperature gage may read high (into the red zone) under normal driving conditions.

Cause: An improper material in the tip of the temperature sensor can cause the temperature gage to read too high. The sensor was changed in production with VIN MT119675.

Correction: Verify that the engine does not have a true overheat condition by comparing the temperature reading of the ECM coolant sensor (measured with a SCAN tool) to the gage reading. If the ECM sensor reads normal at the same time the temperature gage reads high, replace the temperature sensor with P/N 10200490.

Parts are currently available from GMSPO.

Labor Operation Number: T1720 Labor Time: .5 Hours Trouble Code: 92

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