Bravada V6-262 4.3L VIN Z (1991)
Oil Pressure Sender: All Technical Service Bulletins
Engine - Incorrect or Erratic Oil Pressure
NUMBER:
93-T-23
CORP.REF.NO:
268304
DATE:
December 1992
SECTION:
6
SUBJECT:
INCORRECT OR ERRATIC OIL PRESSURE READINGS - INSTALL NEW OIL PRESSURE SENSOR
MODELS/YEARS:
1991-93 BRAVADA W/4.3L (VIN W, Z) ENGINE
CONDITION:
Owners of some 1991-93 Bravadas may comment that the oil pressure dash gauge reads high, has erratic movement or is inoperative.
CAUSE:
The internal resistance wire in the oil pressure sensor may not be properly supported, resulting in an intermittent open condition.
CORRECTION:
Check for normal causes of high oil pressure gauge readings (high resistance or open circuit), such as a poor ground path caused by loose sensor
mounting, oil cooler adapter loose, or poor electrical connections. If no cause can be found, replace the oil pressure sensor following the procedure
below.
1.
Disconnect the negative battery cable.
2.
Remove the wiring harness connector from the oil pressure sensor.
3.
Remove the oil pressure sensor.
4.
Install the new oil pressure sensor. The following parts are currently available form GMSPO:
Engine VIN Code W - P/N 10201490
Engine VIN Code Z - P/N 10201491
5.
Connect the wiring harness connector to the oil pressure sensor.
6.
connect the negative battery cable.
