1991 GMC Safari Service and Repair Manual

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Factory-Grade Data

1991 GMC Safari 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

  • Base Extended Cargo Van 3-Door
  • Base Standard Cargo Van 3-Door
  • Base Extended Passenger Van 3-Door
  • SLE Standard Passenger Van 3-Door
  • SLT Standard Passenger Van 3-Door
  • Base Standard Passenger Van 3-Door
  • SLT Extended Passenger Van 3-Door
  • SLE Extended Passenger Van 3-Door

Engines covered

  • 4.3L 262Cu. In. V6 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

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Vehicle Safety Data

1991 GMC Safari Recalls & Complaints

NHTSA #93V11900002/08/1993Component: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:ROTOR

SEVERE CORROSION DUE TO ROAD SALT AT THE JOINT OF THE STAMPED STEEL CENTER SECTION AND THE CAST OUTER SECTION CAN CAUSE THE SECTIONS TO SEPARATE.

Consequence

SEPARATION OF THE ROTOR SECTIONS CAN CAUSE LOSS OFBRAKING ABILITY IN THE AFFECTED WHEEL. THIS COULD

Remedy

REPLACE THE FRONT BRAKE ROTORS WITH NEW ROTORS WITH A CORROSION PROTECTION COATING. HOWEVER, IF REPL

TSB #10028790

GENERAL MOTORS: ON ALL 1988-2009 FULL SIZE CHEVROLET/GMC PICKUPS, UTILITIES AND VANS, THE BRAKE PEDAL WILL MOVE DOWN OR SELF APPLY DURING FULL LOCK TURNS OR NEAR FULL LOCK TURNS. CHEVROLET ASTRO AND GMC SAFARI VANS; HUMMER 2 ARE INCLUDED. *

TSB #10007838

DIAGNOSTIC INFORMATION FOR INTERMITTENT TRANSMISSION DOWNSHIFT, SLIP, BUSY/CYCLING TCC OR NOISY COOLING FAN. *TT

TSB #10007244

WINDOW REGULATOR MOTOR DOES NOT FIT. *TT

TSB #634999

DIAGNOSIS OF CRACKED OR BROKEN TRANSMISSION CASE. *TT 2006 AND PRIOR CARS AND LIGHT DUTY TRUCKS. *TT

TSB #39304

COLD ENGINE KNOCK. *TW

TSB #39270

UNKNOWN

TSB #38076

CALIFORNIA RECALL - GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1991 C/K TRUCKS, M/L AND G VANS WITH 4.3L ENGINES MAY BE EMITTING NON-METHANE HYDROCARBONS IN EXCESS OF CALIFORNIA EMISSION STANDARDS. TO CORRECT THIS CONDITION, DEALERS ARE TO

TSB #37947

OIL PRESSURE GAUGE READING CONCERNS. *TW

Showing the 8 most recent of 9 technical service bulletins on file with NHTSA.

20000222Component: SEAT BELTS:FRONT:ANCHORAGECrash reported1 injured

THE SEATBELTS WILL NOT REMAIN STABLE. PASSENGERS MUST REPEATEDLY REMOVE AND REATTATCH THEM TO REMAIN SECURE. *AK

19990311Component: VEHICLE SPEED CONTROLCrash reported

THE CONSUMER STATE'S WHILE DRIVING ABOUT 60MPH COMING OFF A RAMP THE VEHICLE WOULD'NT STOP AND THE CONSUMER APPLIED THE BRAKES, AND VEHICLE STILL WOULDN'T STOP, CAUSING THE CONSUMER TO MAKE A RIGHT A

19980806Component: SEATS:FRONT ASSEMBLY:POWER ADJUSTCrash reported

DRIVING AT APPROXIMATELY 40-45 CONSUMER HIT TREE. DEFECT IN DRIVER'S POWER SEAT, CAUSED THE SEATBACK TO FALL ONTO PASSENGER WHO WAS SITTING BEHIND DRIVER. *AK

19971103Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITEDCrash reported

WHILE DRIVING AT APPROX 15 MPH PREPAIRING TO STOP, WEATHER CONDITION WAS DRY, REAR ENDED VEHICLE IN FRONT. WENT TO APPLY BRAKES, HEARD NOISE ,NO REACTION, NO SKID MARKS FROM WHEELS. DEALERSHIP CANNOT

19971103Component: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDERCrash reported

WHILE DRIVING AT APPROX 15 MPH PREPAIRING TO STOP, WEATHER CONDITION WAS DRY, REAR ENDED VEHICLE IN FRONT. WENT TO APPLY BRAKES, HEARD NOISE ,NO REACTION, NO SKID MARKS FROM WHEELS. DEALERSHIP CANNOT

Showing the 5 most serious of 60 complaints filed with NHTSA.

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