2003 GMC Sonoma Service and Repair Manual

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Factory-Grade Data

2003 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 Crew Cab Pickup 4-Door
  • SLS Extended Cab Pickup 3-Door
  • SL Extended Cab Pickup 3-Door
  • SL Standard Cab Pickup 2-Door
  • SLS 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

2003 GMC Sonoma Recalls & Complaints

NHTSA #04V13200018/03/2004Component: EQUIPMENT:OTHER:LABELS

CERTAIN PICKUP TRUCKS AND SPORT UTILITY VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 208, "OCCUPANT CRASH PROTECTION."

Consequence

SOME OF THESE VEHICLES INCLUDE INCORRECT STATEMENTS ON ONE OF THE AIR BAG WARNING LABELS.

Remedy

OWNERS WILL BE PROVIDED WITH CORRECT LABELS AND INSTALLATION INSTRUCTIONS. OWNER NOTIFICATION BEGAN

TSB #10176607

This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels shou

TSB #11020816

This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.

TSB #11009156

This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and

TSB #11007744

This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have hi

TSB #11007743

This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have hi

TSB #11007208

This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed fo

TSB #11006621

Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected mo

TSB #11006421

GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the deal

Showing the 8 most recent of 199 technical service bulletins on file with NHTSA.

20060316Component: SERVICE BRAKES, HYDRAULICCrash reported1 injured

DT*: THE CONTACT STATED WHILE DRIVING 35 MPH ATTEMPTING TO APPLY BRAKE PRESSURE THE VEHICLE WAS INVOLVED IN A CRASH AND THE FRONTAL AIRBAGS DID NOT DEPLOY. THE DRIVER WAS WEARING A SEAT BELT AND A P

20060316Component: AIR BAGS:FRONTALCrash reported1 injured

DT*: THE CONTACT STATED WHILE DRIVING 35 MPH ATTEMPTING TO APPLY BRAKE PRESSURE THE VEHICLE WAS INVOLVED IN A CRASH AND THE FRONTAL AIRBAGS DID NOT DEPLOY. THE DRIVER WAS WEARING A SEAT BELT AND A P

20200309Component: SEATSCrash reported

THE VEHICLE IS KEPT IN A GARAGE AND WHEN OUTSIDE I USE A SCREEN PROTECTOR. THE DASH AND MANY OTHER INTERIOR PARTS OF THE CAR ARE SIMPLY FALLING APART

20050711Component: EQUIPMENTFire reported

MY 2003 GMC SONOMA JUST QUIT STARTING(STANDARD), SO I PUSHED IT TO GET IT HOME, I WENT TO A FRIENDS HOUSE THE NEXT DAY( IT STARTED), WHEN I GOT READY TO LEAVE THE TRUCK WOULDN'T START AGAIN AND I SMEL

20050715Component: SEATS1 injured

DT: THE RAIL ON WHICH THE SEAT SLIDES HAS A SHARP EDGE. ON, MONDAY THE VEHICLES WIFE CUT HER LEG ON THIS SHARP EDGE. SHE HAD TO HAVE 15 STITCHES FOR THE CUT. THE PROBLEM HAS BEEN REPORTED TO THE D

Showing the 5 most serious of 53 complaints filed with NHTSA.

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