Lumina APV V6-191 3.1L (1990)
Coolant Temperature Sensor/Switch (For Computer): Customer Interest
Temperature Gauge - Reads Too High
Number:
91-267-6B
Section:
6B
Date:
APRIL 1991
Corp. Bulletin No.: 138107
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
