2003 Buick LeSabre Service and Repair Manual

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Factory-Grade Data

2003 Buick LeSabre 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.

Built for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and use wiring diagrams and system sections to diagnose problems faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical coverage with wiring diagrams
  • Coverage across key systems: engine, transmission, brakes, steering, suspension, HVAC, and more

Trims covered

  • Custom Sedan 4-Door
  • Limited Sedan 4-Door

Engines covered

  • 3.8L 3800CC 231Cu. 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 Buick LeSabre Recalls & Complaints

NHTSA #02V22200009/08/2002Component: AIR BAGS:FRONTAL

CERTAIN PASSENGER, MINI VANS, AND SPORT UTILITY VEHICLES HAVE AN AIR BAG INFLATOR ON THE DRIVER'S SIDE THAT COULD FRACTURE AT A WELD DURING A DEPLOYMENT.

Consequence

PIECES OF THE INFLATOR COULD STRIKE AND INJURE VEHICLE OCCUPANTS AND THE AIR BAG CUSHION WOULD NOT I

Remedy

DEALERS WILL INSPECT, AND REPLACE, IF NECESSARY, THE AIR BAG MODULE ASSEMBLY ON THE DRIVER'S SIDE.

TSB #11020816

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

TSB #11017252

This service bulletin provides information for dealers/technicians on OnStar Module 2G Sunset Information.

TSB #11014455

This Preliminary Information communication provides information to the technician about vehicles that have an unusual noise and is difficult to identify, isolate or pinpoint. Technician should get record a sound clip or take a video of the

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

Showing the 8 most recent of 449 technical service bulletins on file with NHTSA.

20141125Component: VEHICLE SPEED CONTROLCrash reported2 injured

TL* THE CONTACT OWNED A 2003 BUICK LESABRE. AFTER CRASHING INTO A TREE STUMP, THE CONTACT ATTEMPTED TO REVERSE AND MOVE THE VEHICLE FORWARD WHEN IT SUDDENLY ACCELERATED INDEPENDENTLY, CAUSING THE CONT

20031205Component: AIR BAGS:FRONTALCrash reported2 injured

I WAS HIT HEAD ON. MY VEHICLE A BUICK LESABRE 2003 AND THE VEHICLE WHICH HIT ME, A 2000 CHEVROLET MALIBU WAS TOTALED. THE AIRBAG ON MY BUICK LESABRE DID NOT DEPLOY, THUS CAUSING ME PHYSICAL INJURIES

20230819Component: TIRESCrash reported1 injured

215/70R15 98T Tire purchased 10 days prior blew-out , resulting in total loss of vehicle.

20050425Component: SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITEDCrash reported1 injured

WHILE DRIVING 35 MPH CONSUMER APPLIED BRAKES AND VEHICLE SPED ACROSS THE ROAD INTO ANOTHER LANE, CAUSING A HEAD ON COLLISION. VEHICLE WAS TOTALED. CONSUMER WAS INJURED AND ADMITTED TO THE HOSPITAL.

20031208Component: AIR BAGSCrash reported1 injured

CONSUMER STATED WHILE DRIVING AN AVIS RENTAL ANOTHER VEHICLE TRAVELING AT HIGH SPEEDS HIT THE DRIVERS SIDE OF CONSUMER'S VEHICLE. UPON IMPACT, AIRBAGS DID NOT DEPLOY. CONSUMER SUSTAINED HEAD AND

Showing the 5 most serious of 209 complaints filed with NHTSA.

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