Cutlass Supreme FWD V6-189 3.1L (1989)
Oil Pressure Sender: All Technical Service Bulletins
Instruments - Oil Pressure Light May Flicker At Idle
NUMBER:
89-T-131
CORP.REF.NO:
938306
DATE:
September 1989
SECTION:
6A, 8A
SUBJECT:
LOW OIL PRESSURE LIGHT MAY FLICKER AT IDLE IN
HOT AMBIENT TEMPERATURES (REPLACE SENSOR)
MODELS/YEARS:
1989 CUTLASS SUPREME MODELS WITH 2.8L OR
3.1L ENGINE (VIN CODE W,T) AND INSTRUMENT PANEL GAGE PACKAGE
CONDITION:
The "low" engine oil pressure indicator light may flicker at idle, in very hot ambient temperatures. This condition may occur on 1989 Cutlass Supreme
models equipped wlth 2.8L or 3.1 L engines and instrument panel gage package (these vehicles use both a gage and a "low" oil pressure waming
lndlcator light).
CAUSE:
The diaphragm In the sensor which moves with changes in oil pressure, may be affected by high ambient temperatures. Because the sensor is not vented,
high temperature causes the air inside the sensor to expand, pushing against the diaphragm. The condition can cause a lower than actual reading, which
may cause the "low* oil pressure warning indicator light to flicker at idle.
CORRECTION:
A new vented oil pressure sensor, part number 10096199, has been released for 1990 production. This new sensor should be used for the above service
applications.
Parts are currently available through GMSPO.
WARRANTY INFORMATION:
Labor Operation Number:
N2220
