1989 GMC C2500 Service and Repair Manual
This factory service and repair manual for the 1989 GMC C2500 documents three bodies, the standard cab pickup, the extended cab pickup and the cab and chassis, across Sierra, Sierra SLE and Sierra SLX trim. Four engines are on the list: the 4.3L V6 of 262 cubic inches, the 5.0L V8, the 5.7L V8 and the 6.2L diesel V8, all overhead-valve and naturally aspirated. The cab and chassis version needs frame, mounting and body wiring information the pickups do not, and it is treated separately.
Engines covered
- 5.0L V8 (305 cu in) — OHV, naturally aspirated, gasoline
- 6.2L V8 (379 cu in) — OHV, naturally aspirated, diesel
- 4.3L V6 (262 cu in) — OHV, naturally aspirated, gasoline
- 5.7L V8 (350 cu in) — OHV, naturally aspirated, gasoline
Body styles covered
- 2-door standard cab pickup
- 2-door extended cab pickup
- 2-door cab & chassis
Trims covered
- Sierra
- Sierra SLE
- Sierra SLX
Known issues on the 1989 C2500. Three recalls are recorded for this model year. The first concerns replacement oil filters able to seal poorly and lose engine oil, raising a fire risk. The second describes transmission fluid driven out of the vent tube by unanticipated heat, which can catch fire near a source of ignition. The third is an instruction error covering adjustment of the rear lap-shoulder belts, leaving a belt that may not restrain an occupant properly. Nine owner complaints follow, four on engine and engine cooling, two on seat belts and one on the power train.
CERTAIN HONEYWELL FRAM RACING BRAND HP4 AND HP8 OIL FILTERS THAT WERE MANUFACTURED FROM MAY 25, 2006, THROUGH SEPTEMBER 14, 2007, AND SOLD FOR USE AS REPLACEMENT EQUIPMENT FOR VEHICLES LIST ABOVE. TH
THIS CONDITION MAY CAUSE INADEQUATE SEALING AND LOSS OF ENGINE OIL, POSSIBLY RESULTING IN A FIRE.
HONEYWELL WILL REPLACE THE AFFECTED OIL FILTERS FREE OF CHARGE. THE RECALL BEGAN DURING NOVEMBER 20
TRUCKS CAN CONTAIN INCORRECT INSTRUCTIONS ON HOW TO PROPERLY ADJUST REAR SEAT LAP-SHOULDER BELTS AS REQUIRED BY FMVSS 209.
INCORRECTLY ADJUSTED SEAT BELT WOULD NOT PROPERLYRESTRAIN OCCUPANT IN AN ACCIDENT OF SUDDEN STOP; TR
PROVIDE OWNER'S MANUAL INSERT CONTAINING THE CORRECT REAR LAP-SHOULDER BELT INSTRUCTIONS.
UNANTICIPATED HEAT IN THE TRANSMISSION CAN FORCE THE TRANSMISSION FLUID OUT OF THE VENT TUBE.
THE VENTED TRANSMISSION FLUID CAN CATCH FIRE IF EXPOSEDTO A SOURCE OF IGNITION.
INSTALL A LONGER TRANSMISSION VENT HOSE ROUTED TO THE LEFT SIDE OF THE ENGINE COMPARTMENT OF THE VEH
SPEEDOMETER FAILED. *YH
BRAKES FAILED ON SEVERAL OCCASION AND THE PROBLEM HAS NOT BEEN RESOLVED. *YH
RADIATOR FAILED ON SEVERAL OCCASIONS. *YH
THE SEAL KING PINS ON THE STEERING CANNOT BE GREASED & THEY WEAR OUT FAST. *AK
Showing the 4 most serious of 9 complaints filed with NHTSA.
