1990 GMC K3500 Service and Repair Manual
This factory service and repair manual for the 1990 GMC K3500 lists the 7.4L gasoline V8, the 6.2L diesel V8 and the 5.7L gasoline V8, three naturally aspirated engines shared between a standard cab pickup, an extended cab pickup and a cab & chassis. The trim range is Sierra, Sierra SLE and Sierra SLX. What varies between two trucks of this year is body configuration and equipment rather than mechanical layout, so the wiring diagrams do as much work as the engine specifications.
Engines covered
- 7.4L V8 (454 cu in) — OHV, naturally aspirated, gasoline
- 6.2L V8 (379 cu in) — OHV, naturally aspirated, diesel
- 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 1990 K3500. Of the four recalls on the federal record, three describe distinct failure paths. Replacement fuel filters can seal imperfectly at the connection and allow a fuel leak near an ignition source. Transmission fluid can be forced out of the vent tube by unanticipated heat and ignite on contact with something hot. And incorrect rear lap-shoulder belt adjustment instructions were supplied with some trucks, so a belt set by them may not restrain an occupant in a sudden stop. One owner complaint is logged with NHTSA, on the electrical system, which is where the wiring diagrams earn their place.
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
CERTAIN REPLACEMENT FUEL FILTERS, FRAM BRAND NAME P/N G3727, WITH DATE CODES X52911 THROUGH X60801 SEQUENTIALLY OR X600141 AND A MEXICO COUNTRY OR ORIGIN MARKING ON THE FUEL FILTER HOUSING MANUFACTURE
THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FUEL LEAK. I
HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN ON OCTOB
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
ENGINE COMPARTMENT FIRE, TWO FIRES INVOLVING ELECTIRCAL SYSTEM. TT
