1994 GMC Sonoma Service and Repair Manual

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Factory-Grade Data

1994 GMC Sonoma 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

  • SLS Extended Cab Pickup 2-Door
  • SLE Extended Cab Pickup 2-Door
  • SL Standard Cab Pickup 2-Door
  • SLS Standard Cab Pickup 2-Door
  • SLE Standard Cab Pickup 2-Door

Engines covered

  • 2.2L 2190CC 134Cu. In. l4 GAS OHV Naturally Aspirated
  • 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

1994 GMC Sonoma Recalls & Complaints

NHTSA #99V19300019/07/1999Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED

VEHICLE DESCRIPTION: CERTAIN 4-WHEEL DRIVE PICKUP TRUCKS AND SPORT UTILITY VEHICLES EQUIPPED WITH ABS (ANTILOCK BRAKING SYSTEM) MANUFACTURED FROM SEPTEMBER 1989 THROUGH AUGUST 1996. UNDER CERTAIN D

Consequence

IF THIS OCCURRED AT A TIME WHEN MINIMUM STOPPING DISTANCE WAS REQUIRED, A VEHICLE CRASH COULD OCCUR

Remedy

DEALERS WILL REPLACE OR REPAIR THE 4-WHEEL/2-WHEEL DRIVE SWITCH.

NHTSA #99I00600019/07/1999Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED

THIS IS NOT A SAFETY RECALL IN ACCORDANCE WITH THE SAFETY ACT. HOWEVER, IT IS DEEMED A SAFETY IMPROVEMENT CAMPAIGN BY THE AGENCY. VEHICLE DESCRIPTION: CERTAIN LIGHT DUTY PICKUP TRUCKS, SPORT UTI

Consequence

THESE VEHICLES CAN EXPERIENCE EXTENDED STOPPING DISTANCES DURING ABS STOPS ON CERTAIN MULTIPLE SURFA

Remedy

DEALERS WILL MODIFY THE COMPUTER PROGRAM WHICH OPERATES THE ABS UNIT ON SOME VEHICLES, OR REPLACE TH

NHTSA #06E04300019/05/2006Component: FUEL SYSTEM, GASOLINE

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 HOUSING MANUFACTURE

Consequence

THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FUEL LEAK. I

Remedy

HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN ON OCTOB

NHTSA #06E04100018/05/2006Component: FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS

CERTAIN R&B, INC. CENTRAL MULTIPORT FUEL INJECTION (CMFI) FUEL RETURN LINES, MODELS HELP 55163, NAPA BALKAMP 700-3270, AND THE CONNECTION 2560001, SOLD FOR USE AS REPLACEMENT EQUIPMENT FOR THE VEHICLE

Consequence

A FUEL LEAK CAN OCCUR AT THE VALVE, POSSIBLY RESULTING IN A FIRE.

Remedy

R&B, INC. WILL NOTIFY OWNERS AND AT THE CUSTOMERS REQUEST, EITHER REPLACE THE FUEL LINE OR OFFER A F

NHTSA #97V09600112/06/1997Component: SEAT BELTS

VEHICLE DESCRIPTION: EXTENDED CAB PICKUP TRUCKS EQUIPPED WITH 60/40 FRONT BENCH SEATS AND EXTENDED CAB PICKUP TRUCKS AND 2-DOOR UTILITY VEHICLES EQUIPPED WITH MANUAL LOCKING RECLINER BUCKET SEATS. T

Consequence

IF A SEPARATION OCCURRED AND THERE WERE SECONDARY CRASH EVENTS OR VEHICLE ROLLOVER, THERE WOULD BE N

Remedy

DEALERS WILL INSTALL A PROTECTIVE COVER OVER THE RECLINER MECHANISM.

NHTSA #07E02100012/03/2007Component: FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES

CERTAIN DELPHI FUEL PRESSURE REGULATORS, P/NOS. FP10020-11B1, FP10026-11B1, AND FP10027-11B1, SOLD AFTER JANUARY 9, 2007, AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES LISTED ABOVE. THE UNI

Consequence

FUEL MAY LEAK, POSSIBLY RESULTING IN A FIRE.

Remedy

DELPHI WILL NOTIFY OWNERS AND REPLACE THE UPR FREE OF CHARGE. THE RECALL BEGAN ON APRIL 23, 2007.

TSB #10246631

Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules

TSB #608382

SUBJECT REGARDING ABS 3-SENSOR EBC4 - SPECIAL POLICY. *TT

TSB #52935

INFORMATION CONCERNING ENGINE KNOCK/RATTLE OR TAP NOISE BEFORE ENGINE HAS REACHED OPERATING TEMPERATURE OR UNDER LIGHT LOAD CONDITIONS AT OPERATING TEMPERATURE (REPLACE PISTON AND/OR ROD ASSEMBLIES). AK

TSB #51302

KNOCK, RATTLE OR TAP NOISE FROM THE ENGINE BEFORE THE ENGINE HAS REACHED OPERATING TEMPERATURE OR UNDER LIGHT LOAD CONDITIONS AT OPERATING TEMPERATURE KNOCK, RATTLE OR TAP NOISE FROM THE ENGINE BEFORE THE ENGINE HAS REACHED OPERATING TEMPER

TSB #41072

END GATE LATCH RATTLE (INSTALL REVISED STRIKER). *TW

TSB #41076

WATER LEAK AT THE A/C RECIRCULATION DOOR (INSTALL NEW HOOD HINGE SEAL). *TW

TSB #41078

STEPPER MOTOR CRUISE CONTROL WILL NOT RESUME OR RESET (REPLACE SMCC MODULE). *TW

TSB #4069300

UNKNOWN

Showing the 8 most recent of 14 technical service bulletins on file with NHTSA.

19990722Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITEDCrash reported3 injured

POWER DOOR LOCKS AND WINDOW ON DRIVERS DOOR FAIL CONSTANTLY. ABS BRAKES LOCKEDAND CAUSE AN ACCIDENT.*AK

19990722Component: VISIBILITY:POWER WINDOW DEVICES AND CONTROLSCrash reported3 injured

POWER DOOR LOCKS AND WINDOW ON DRIVERS DOOR FAIL CONSTANTLY. ABS BRAKES LOCKEDAND CAUSE AN ACCIDENT.*AK

19990722Component: STRUCTURE:BODY:DOORCrash reported3 injured

POWER DOOR LOCKS AND WINDOW ON DRIVERS DOOR FAIL CONSTANTLY. ABS BRAKES LOCKEDAND CAUSE AN ACCIDENT.*AK

19960423Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITEDCrash reported1 injured

WHILE DRIVING, ON MULD/SNOW/ICE, EXPERIENCED ABS FAILURE, WHEN ANTI-LOCK BRAKES RELEASE TIRE FROM STOPPING, RESULTING IN ROLLOVER. *AK

19950908Component: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTSCrash reported1 injured

BRAKES FAILED 5 TIMES, ONCE RESULTING IN AN ACCIDENT/INJURY

Showing the 5 most serious of 297 complaints filed with NHTSA.

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