1993 GMC C3500 Service and Repair Manual
This factory service and repair manual for the 1993 GMC C3500 covers four engines: the turbocharged 6.5L diesel V8, the naturally aspirated 6.2L diesel V8, and the 5.7L and 7.4L gasoline V8s. Those go into five different body configurations — standard cab, extended cab and crew cab pickups plus two- and four-door cab-and-chassis trucks — sold as Sierra, Sierra SLE or Sierra SLX. The result is a book that has to be precise about which figures belong to which combination, and it is, splitting procedures, specifications, torque values, wiring diagrams and diagnostics by system.
Engines covered
- 6.5L V8 (395 cu in) — OHV, turbocharged, diesel
- 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
- 4-door cab & chassis
- 4-door crew cab pickup
- 2-door extended cab pickup
- 2-door cab & chassis
Trims covered
- Sierra
- Sierra SLE
- Sierra SLX
Known issues on the 1993 C3500. Two recalls apply. One covers replacement oil filters that may not seal against their mounting, letting engine oil out where it can catch fire; the other describes heat forcing transmission fluid through the vent tube with the same result. Owner complaints are heavier here, twenty in total, and they concentrate: five on steering, four on the power train and four on the service brakes. Those three systems get the manual's fullest treatment — steering gear and linkage, transmission and axle repair, and brake hydraulics — each with its specifications, torque values, wiring diagrams and diagnostic charts.
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
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
UNKNOWN
GENERAL MOTORS HAS DETERMINED THAT SOME 1993 GMC TRUCK VANDURA 3500 MODELS MAY HAVE BEEN SHIPPED WITH HOOD HINGES MANUFACTURED FROM AN UNSPECIFIED STEEL. TO CORRECT THIS CONDITION, DEALERS ARE TO REPLACE THE HINGES. *TW
BRAKE PADS REPLACED TEN TIMES DUE TO BRAKE FAILURES, ONCE CAUSING LOSS OF CONTROL/ACCIDENT.
WE HAVE EXPERIENCED APPROXIMATELY 12+/- FAILURES IN THE PAST COUPLE OF WEEKS IN WHICH THE TIRE TREAD HAS SEPERATED FROM THE CASING, IN SOME CASES CAUSING DAMAGE TO THE VEHICLE. THE TIRES WERE ON SEVE
CONSUMER STATES THAT THE LEFT REAR AXLE SEAL HAS BEEN REPLACED (4) OR (5) TIMES IN THE PAST YEAR AND A HALF BECAUSE OF LEAKAGE. NEEDS TO BE REPLACED AGAIN. *AK
TRANSMISSION PROBLEM. *SD
CRUISE CONTROL PROBLEM. *SD
Showing the 5 most serious of 20 complaints filed with NHTSA.
