1991 GMC Syclone Service and Repair Manual

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Factory-Grade Data

1991 GMC Syclone 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 Standard Cab Pickup 2-Door

Engines covered

  • 4.3L 262Cu. In. V6 GAS OHV Turbocharged

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 Syclone Recalls & Complaints

No active recalls The 1991 GMC Syclone has no recalls on file with NHTSA.
No service bulletins No technical service bulletins on file with NHTSA for the 1991 GMC Syclone.
20000207Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITEDCrash reported

WHILE DRIVING IN STOP AND GO TRAFFIC TRAVELING 3-5MPH, VEHICLE IN FRONT STOPPED SUDDENLY. CONSUMER WENT TO APPLY BRAKES, AND BRAKES FAILED AND PEDAL WENT TO THE FLOOR. DENTED THE BUMPER, AND CRACKED

19990727Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITEDCrash reported

FAILED TO STOP AND CRASHED INTO REAR OF VEHICLE IN FRONT OF ME

19991122Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED

FRONT SHAFT FROM TRANSFER CASE TO DIFFERENTIAL FAILED, REPLACED UNDER FACTORY WARRANTY, ABS BRAKE MASTER UNIT FAILED AT 52,550 MILES OUTSIDE THE EXTENDED WARRANTY BY 6 MONTHS DEALER REFUSED TO REPAIR

19991122Component: POWER TRAIN:DRIVELINE:DRIVESHAFT

FRONT SHAFT FROM TRANSFER CASE TO DIFFERENTIAL FAILED, REPLACED UNDER FACTORY WARRANTY, ABS BRAKE MASTER UNIT FAILED AT 52,550 MILES OUTSIDE THE EXTENDED WARRANTY BY 6 MONTHS DEALER REFUSED TO REPAIR

19981130Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED

THE CONSUMER HAS BEEN EXPERIENCING PROBLEMS WITH ANTI-LOCK BRAKE SYSTEM. WHEN APPLYING THEIR BRAKES, DRIVER'S FOOT GOES ALL THE WAY TO THE FLOORBOARD. THE MANUFACTURER HAS YET TO BE CONTACTED. INVE

Showing the 5 most serious of 8 complaints filed with NHTSA.

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