Grand Prix V6-191 3.1L (1989)
Oil Pressure Sender: All Technical Service Bulletins
Instruments - Oil Pressure Light May Flicker At Idle
Bulletin Number:
89-8-27
Reference Number:
938306
Publish Date:
9/89
Subject:
OIL PRESSURE LIGHT MAY FLICKER AT IDLE IN HOT AMBIENT TEMPERATURES (REPLACE SENSOR)
Models
Affected:
1989 6000 AND GRAND PRIX MODELS WITH 2.8 and 3.1L
Pontiac:
1989 6000 and Grand Prix, 2.8L and 3.1L
Condition:
The oil pressure light may flicker at idle, in very hot ambient temperatures. This condition may occur on 1989 6000 and Grand Prix models with 2.8L or
3.1L engines, with optional gage packages (these vehicles use both a gage and an oil pressure warning light).
Cause:
The diaphragm, which moves with changes in oil pressure, may be affected by high ambient temperatures in the sensor, because the sensor is not vented.
The high temperature causes the air inside the sensor to expand, pushing against the diaphragm, giving a lower than actual reading, which may cause the
warning 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
applications for service.
Parts are expected to be available on September 11, 1989. Until then Normal part orders will not be accepted by GMSPO. Only verifiable VIP Orders
will be accepted. SPO will make every effort to obtain parts. All parts will be placed on 400 control to waive VIP surcharges. However, the part will be
shipped premium transportation at dealer's expense. All other order types will be canceled as incorrectly ordered while the 400 control is in place.
Warranty Information:
Use Labor Operation N2220, with applicable time.
