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2003 Buick Lesabre CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Buick REPAIR SHOPS DON'T WANT YOU TO KNOW
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- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Tire Pressure Monitoring System
- Starter & Alternator Replacement
- Cabin Air Filter Locations & Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 Buick Lesabre car and truck
repair procedures including Buick engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your Buick Lesabre automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2003 Buick Lesabre AUTOMOBILES
Compressor Service -> Harrison Compressors -> Clutch Coil, Replace -> Installation -> Removal
Vehicle: 2003 Buick Lesabre Custom 3.8 V6 GAS
Removal
- Remove pulley rotor and bearing as outlined under "Clutch Rotor & Bearing, Replace."
- Mark clutch coil terminal location on compressor front head.
- Remove clutch coil using puller pilot tool No. J-33023-A, puller bar tool No. J-8433-1, forcing screw tool No. J-8433-3 with clutch coil puller legs tools No. J-33025, or equivalents, Fig. .
Installation
- Position clutch coil assembly on front head with terminals located at mark.
- Place clutch coil tool No. J-33024, or equivalent, over internal opening of clutch coil housing a...
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BRAKE SERVICE PROCEDURES FOR 2003 Buick Lesabre AUTOMOBILES
Drum Brakes -> Type 5 -> Adjustments -> Parking Brake -> Service Brake
Vehicle: 2003 Buick Lesabre Limited 3.8 V6 GAS
Service Brake
- Raise and support vehicle.
- Mark relationship of wheel to axle, then remove wheel and tire assembly.
- Remove brake drum. If drum is difficult to remove, proceed as follows:
- Ensure parking brake is released.
- Back off parking brake cable adjustment.
- Remove access hole plug from backing plate, insert screwdriver through hole and push parking brake lever off its stop.
- Insert punch through hole in splash shield, Fig. , tap on punch to loosen drum, then remove drum.
- Measure inside diameter of drum using tool Nos. J-21177-A or J-22364-01, or their equivalents.
- Adjust by turning star whe...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Buick Lesabre AUTOMOBILES
General Motors Corp./Saturn Passenger Cars -> Fuel Filter Scheduled Maintenance -> 1980-06 Gasoline Engine Models Except Catera, LeMans (1988-93) Metro, Nova (1985-88), Saturn & Sprint -> Normal Service -> Severe Service
Vehicle: 2003 Buick Lesabre Limited 3.8 V6 GAS
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Buick Lesabre AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 2003 Buick Lesabre Limited 3.8 V6 GAS
- Raise and support vehicle.
- Remove tire and wheel assembly.
- Disconnect outer tie rod end from steering knuckle. Do NOT loosen tie rod end jam nut.
- Insert a drift or punch into brake rotor and against brake caliper in order to prevent wheel hub and bearing from turning.
- Remove and discard wheel drive shaft spindle nut retaining wheel drive shaft to hub.
- Remove stabilizer shaft link.
- Disconnect electrical connector from wheel speed sensor and reposition wiring harness away from ball joint.Be sure that wheel speed sensor wiring harness is repositioned away from ball joint after dis...
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TIRE PRESSURE MONITORING SYSTEM PROCEDURES FOR 2003 Buick Lesabre AUTOMOBILES
Diagnosis & Testing -> Accessing Diagnostic Trouble Codes -> Clearing Diagnostic Trouble Codes -> Diagnostic Tests -> Intermittent & Poor Connections -> Intermittents -> Poor Connections
Vehicle: 2003 Buick Lesabre Limited 3.8 V6 GAS
Accessing Diagnostic Trouble Codes
Connect a suitably programmed scan tool to DLC (Data Link Connector) and follow manufacturer's instructions.
Diagnostic Tests
Refer to Figs. and for diagnostic test procedures.
Clearing Diagnostic Trouble Codes
Connect a suitably programmed scan tool to DLC (Data Link Connector), and follow manufacturer's instructions.
Intermittent & Poor Connections
Intermittents
Most intermittents are caused by faulty electrical connections or wiring. Inspect for the following:
- Wiring broken inside insulation.
- Poor connection between male and female terminal at c...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Buick Lesabre AUTOMOBILES
Alternator, Replace
Vehicle: 2003 Buick Lesabre Limited 3.8 V6 GAS
- Disconnect battery ground cable.
- Remove drive belt.
- Remove fuel injector sight shield.
- Remove fasteners securing alternator brace.
- Remove alternator brace.
- Disconnect wiring harness connector from alternator.
- Reposition protective boot from alternator output BAT terminal for access.
- Remove alternator output BAT terminal nut a...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 Buick Lesabre AUTOMOBILES
Cabin Air Filter Service -> General Motors Corp./Saturn -> 2000-05 Bonneville, LeSabre & 2001-02 Aurora
Vehicle: 2003 Buick Lesabre Custom 3.8 V6 GAS
Under normal operating conditions the cabin air filter should be replaced every 12 months or 15,000 miles. In dusty areas change the cabin air filter more often.
- Open the hood.
- Lift up the cabi...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Buick Lesabre AUTOMOBILES
General Motors Corp./Saturn Cars -> Change Oil, Change Oil Now Or Change Oil Soon Lamp & Messages -> 2000-05 LeSabre
Vehicle: 2003 Buick Lesabre Limited 3.8 V6 GAS
- Turn ignition On.
- While Oil Life Index is displayed on DIC (Driver Information Center), ...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Buick Lesabre AUTOMOBILES
Radiator, Replace
Vehicle: 2003 Buick Lesabre Custom 3.8 V6 GAS
- Drain engine coolant into suitable container.
- Remove upper radiator seal.
- Remove upper radiator support bar.
- Disconnect and plug coolant overflow hose from radiator.
- Disconnect upper and lower radiator hoses from radiator and position out of way.
- Remove bolt from transmission oil cooler pipe clip at lower radiator tie bar.
- Remove cooling fans.
- Disconnect transmission fluid cooler lines from radiator using coupling tool No. J41623-B, or equivalent. Position lines aside.
- Disconnect overflow hose from radiator.
- The bolt retaining the condenser...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Buick Lesabre AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Buick Lesabre Limited 3.8 V6 GAS
- On models equipped with airbag, disable airbag system.
- On all models, disconnect battery ground cable.
- Rotate tensioner counterclockwise using suitable tool to remove drive belt.
- Remove tensioner pulley attaching bolt, then remove pulley.
- Remove power steering pump from bracket and position aside.
- Loosen, but do not remove, alternator attaching bolts, then remove alter...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Buick Lesabre AUTOMOBILES
Component location diagrams for most 2003 Buick Lesabre cars and light trucks sold in the U.S. from 1990+.
 Ground Locations Diagram for 2003 Buick Lesabre Limited 3.8 V6 GASComponents on diagram: |
 Center Rear Of Headliner Diagram for 2003 Buick Lesabre Custom 3.8 V6 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2003 Buick Lesabre AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Buick Lesabre cars and light trucks sold in the U.S.
 2003 Buick Lesabre Limited 3.8 V6 GAS Wiring DiagramComponents on diagram: |
 2003 Buick Lesabre Custom 3.8 V6 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Buick Lesabre AUTOMOBILES
OEM TSB listings for most 2003 Buick Lesabre cars and light trucks sold in the U.S. from 1985+.
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Document: Revised General Motors New Vehicle Tire Warranty Program Vehicle: 2003 Buick Lesabre Custom 3.8 V6 GAS Auto Systems: |
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Document: New Website for AFIT, TPM, and VDR Updates Vehicle: 2003 Buick Lesabre Custom 3.8 V6 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Buick Lesabre AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Buick Lesabre cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 2003 Buick Lesabre cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 2003 Buick Lesabre cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 2003 Buick Lesabre cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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