1994 GMC Sonoma Service and Repair Manual
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
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
IF THIS OCCURRED AT A TIME WHEN MINIMUM STOPPING DISTANCE WAS REQUIRED, A VEHICLE CRASH COULD OCCUR
DEALERS WILL REPLACE OR REPAIR THE 4-WHEEL/2-WHEEL DRIVE SWITCH.
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
THESE VEHICLES CAN EXPERIENCE EXTENDED STOPPING DISTANCES DURING ABS STOPS ON CERTAIN MULTIPLE SURFA
DEALERS WILL MODIFY THE COMPUTER PROGRAM WHICH OPERATES THE ABS UNIT ON SOME VEHICLES, OR REPLACE TH
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
THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FUEL LEAK. I
HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGAN ON OCTOB
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
A FUEL LEAK CAN OCCUR AT THE VALVE, POSSIBLY RESULTING IN A FIRE.
R&B, INC. WILL NOTIFY OWNERS AND AT THE CUSTOMERS REQUEST, EITHER REPLACE THE FUEL LINE OR OFFER A F
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
IF A SEPARATION OCCURRED AND THERE WERE SECONDARY CRASH EVENTS OR VEHICLE ROLLOVER, THERE WOULD BE N
DEALERS WILL INSTALL A PROTECTIVE COVER OVER THE RECLINER MECHANISM.
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
FUEL MAY LEAK, POSSIBLY RESULTING IN A FIRE.
DELPHI WILL NOTIFY OWNERS AND REPLACE THE UPR FREE OF CHARGE. THE RECALL BEGAN ON APRIL 23, 2007.
Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
SUBJECT REGARDING ABS 3-SENSOR EBC4 - SPECIAL POLICY. *TT
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
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
END GATE LATCH RATTLE (INSTALL REVISED STRIKER). *TW
WATER LEAK AT THE A/C RECIRCULATION DOOR (INSTALL NEW HOOD HINGE SEAL). *TW
STEPPER MOTOR CRUISE CONTROL WILL NOT RESUME OR RESET (REPLACE SMCC MODULE). *TW
UNKNOWN
Showing the 8 most recent of 14 technical service bulletins on file with NHTSA.
POWER DOOR LOCKS AND WINDOW ON DRIVERS DOOR FAIL CONSTANTLY. ABS BRAKES LOCKEDAND CAUSE AN ACCIDENT.*AK
POWER DOOR LOCKS AND WINDOW ON DRIVERS DOOR FAIL CONSTANTLY. ABS BRAKES LOCKEDAND CAUSE AN ACCIDENT.*AK
POWER DOOR LOCKS AND WINDOW ON DRIVERS DOOR FAIL CONSTANTLY. ABS BRAKES LOCKEDAND CAUSE AN ACCIDENT.*AK
WHILE DRIVING, ON MULD/SNOW/ICE, EXPERIENCED ABS FAILURE, WHEN ANTI-LOCK BRAKES RELEASE TIRE FROM STOPPING, RESULTING IN ROLLOVER. *AK
BRAKES FAILED 5 TIMES, ONCE RESULTING IN AN ACCIDENT/INJURY
Showing the 5 most serious of 297 complaints filed with NHTSA.
