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1991 GMC C1500 Service and Repair Manual
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$29.99 USD
Unit price
Covers all 1991 C1500 trims — Sierra SLE Standard Cab Pickup 2-Door, Sierra Extended Cab Pickup 2-Door, Sierra SLE Extended Cab Pickup 2-Door +3 more ·
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Complete repair procedures
Wiring diagrams & schematics
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1991 GMC C1500 Service and Repair Manual
Regular price
$29.99 USD
Unit price
1991 GMC C1500 service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.
Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.
What’s included
- Step-by-step repair procedures and service information
- Specifications and reference data (where provided)
- Wiring diagrams and electrical sections
- Powertrain, brakes, steering, suspension, HVAC and more
Trims covered
- Sierra SLE Standard Cab Pickup 2-Door
- Sierra Extended Cab Pickup 2-Door
- Sierra SLE Extended Cab Pickup 2-Door
- Sierra SLX Extended Cab Pickup 2-Door
- Sierra SLX Standard Cab Pickup 2-Door
- Sierra Standard Cab Pickup 2-Door
Engines covered
- 5.0L 305Cu. In. V8 GAS OHV Naturally Aspirated
- 6.2L 379Cu. In. V8 DIESEL OHV Naturally Aspirated
- 4.3L 262Cu. In. V6 GAS OHV Naturally Aspirated
- 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated
Index / Table of contents
- Body
- Brakes
- Chassis Electrical
- Driveline
- Engine Cooling
- Engine Electrical
- Engine Mechanical
- Engine Performance & Emission Controls
- Fuel System
- General Information & Identification
- Heating, Ventilation, & Air Conditioning
- Hybrid & Electric Vehicle Systems
- Steering
- Suspension
- Transmission, Clutch, & Transfer Case
- Wiring Diagrams
UNANTICIPATED HEAT IN THE TRANSMISSION CAN FORCE THE TRANSMISSION FLUID OUT OF THE VENT TUBE.
Consequence
THE VENTED TRANSMISSION FLUID CAN CATCH FIRE IF EXPOSEDTO A SOURCE OF IGNITION.
Remedy
INSTALL A LONGER TRANSMISSION VENT HOSE ROUTED TO THE LEFT SIDE OF THE ENGINE COMPARTMENT OF THE VEH
SOME CUSTOMERS MAY COMMENT ON FRONT DOOR HINGE PIN BUSHING WEAR, FRONT DOOR SAG, OR DOOR CHUCKING MOVEMENT IN EXTREME OPERATING CONDITIONS. *TT
WHILE DRIVING VEHICLE THE ENGINE CAUGHT ON FIRE. (OHIO STATE POLICE REPORT)
WINDSHIELD WIPERS OFTEN STOP WORKING WITHOUT WARNING. VERY DANGEROUS SITUATION WHEN IT IS RAINING. YOU CAN SOMETIME PULL ON THE WIPER BLADES TO GET THE WIPERS TO START WORKING AGAIN BUT SOMETIMES TH
FOR THE RECORD I WANTED TO INFORM YOU THAT I HAD ONE WILDERNESS AT III COME APART ON ME AT APPROX 70 MPH IT WAS A REAR TIRE AND CAUSED NO ACCIDENT BUT THE SEPERATED TREAD DID DO DAMAGE TO MY FENDER.
WHILE DRIVING AT ANY SPEED AND APPLYING THE BRAKES, BRAKE PEDAL WENT STRAIGHT TO THE FLOORBOARD AND DID NOT STOP VEHICLE.CONSUMER HAD TO PUMP THE BRAKES DUE TO THE ABS SYSTEM WHICH KICKED IN, AND CA
DRIVER'S BUCKLE FAILED TO LATCH PROPERLY. DEALER NOTIFIED AND REPLACED BUCKLE ON 10-21-94 WITH APPROXIMATELY 20,000 MILES OF WEAR. AT APPROXIMATELY 40,000, ON 5-17-99, BUCKLE FAILED TO LATCH AGAIN.
Other Years of the GMC C1500
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