1991 Chevrolet C3500 Service and Repair Manual
This factory service and repair manual for the 1991 Chevrolet C3500 stands behind three overhead-valve V8s: the naturally aspirated 7.4-liter of 454 cubic inches, the 5.7-liter 350, and the 6.2-liter 379-cubic-inch diesel. The truck came as a standard cab pickup, an extended cab pickup or a cab and chassis, with Cheyenne, Scottsdale and Silverado above them as trims. What the manual adds to that outline is the detail a one-ton truck needs: clearances, torque figures, wiring diagrams and diagnostic sequences arranged by system.
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 cab & chassis
- 2-door extended cab pickup
Trims covered
- Cheyenne
- Scottsdale
- Silverado
Known issues on the 1991 C3500. One recall appears on the federal record here, and it is a fuel-side fault: replacement filters that do not seal properly at their connection, allowing a leak that could ignite if a spark or a hot surface is nearby. The complaint record is thin at three entries, one each on tires, structure and the power train. None of that changes what a technician needs on the bench, and the fuel system, frame and body, and transmission and driveline sections carry the specifications, torque values and diagnostic steps for exactly those areas.
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
THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FU
HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGA
UNKNOWN
WHILE DRIVING AT 55 MPH REAR LEFT TIRE BLEW OUT. 500 MILES LATER THE LEFT REAR TIRE BLEW OUT. THE TIRE WAS SHIPPED TO THE MANUFACTURER WAS INDICATED THAT THEY COULD NOT FIND A
FRAME CRACKED.
REVERSE/DRIVE GEARS FAILED.
