Preliminary Evaluation · FRCTR OF P/S PUMP BRCKT · Opened 1987-10-09 · Closed 1988-04-22
Investigation
Action number
PE88002
Type
Preliminary Evaluation
Open date
1987-10-09
Close date
1988-04-22
Manufacturer
General Motors, LLC
Affected makes
CHEVROLET; GMC
Affected components
STEERING
Affected model years
1987
Affected (make, year) variants
8
Summary
GENERAL MOTORS HAS DETERMINED THAT SOME 1987 GMC S/T MODEL TRUCKS MAYEXPERIENCE FRACTURE OF THE POWER STEERING PUMP SUPPORT BRACE. THISCONDITION CAN IN TURN LEAD TO POSSIBLE FRACTURE OF THE POWER STEERINGPUMP MOUNTING BRACKET AND/OR LOSS OF THE SERPENTINE ACCESSORY DRIVEBELT. LOSS OF THE DRIVE BELT WOULD RESULT IN LOSS OF A/C, GENERATOR,POWER STEERING ASSIST AND WATER PUMP OPERATION.ANALYSIS: THERE ARE NO REPORTS IN THE ODI LETTER FILE REGARDING THISPROBLEM.ALTHOUGH G.M. HAS 153 COMPLAINTS, MOST OFWHICH ARE WARRANTY CLAIMS, ONLY TWO ACCIDENTS HAVE BEEN REPORTED THATWERE ALLEGDLY CAUSED BY THE FAILURE OF THE P/S SYSTEM. P/S ASSIST FAILURESHOULD NOT NEGATE STEERING CONTROL EVEN THOUGH THERE IS AN APPRECIABLEINCREASE IN STEERING EFFORT.======