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2003 Buick Regal 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
A/C & HEATER SERVICE PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
Computer Relearn Procedures -> General Motors Corp. -> 1997-98 -> 1998-2000 -> 1998-99 -> 1999-2001 -> 1999-2002 -> 2.2L & 2.4L Engines -> 2000-02 -> 2000-04 -> 2001-02 -> 2001-04 -> 3.1L, 3.4L, 3800/3.8L, 4.0L & 4.6L Engines -> 3.5L Engine -> 5.7L Engine -> Achieva, Alero, Grand Am & Skylark -> Achieva, Cavalier, Skylark & Sunfire -> Alero & Grand Am -> Alero & Malibu -> Aurora -> Aurora, Bonneville, DeVille, LeSabre & Seville -> Aurora, Bonneville, Grand Prix, LeSabre & Park Avenue -> Auto Learn Passlock Procedure -> Body Control Module (BCM) -> Bonneville -> Bonneville, Eighty Eight, LeSabre, LSS & Park Avenue -> C & K Series w/Diesel Engine -> C & K Trucks w/Diesel Engine -> Camaro & Firebird -> Catera -> Cavalier & Sunfire -> Century -> Century, Grand Prix, Impala, Intrigue, Lumina, Monte Carlo & Regal -> Century, Impala, Intrigue, Monte Carlo & Regal -> Corvette -> Crankshaft Position System Variation Learn -> Cutlass & Malibu -> Dash Integration Module (DIM) -> DeVille -> DeVille, Eldorado & Seville -> EEPROM -> Eldorado -> Engine Control Module (ECM) -> Engine Performance -> Except Park Avenue -> Grand Am -> Grand Prix & Regal -> Impala & Monte Carlo -> Instrument Panel Integration Module (IPM) -> Intrigue -> LeSabre -> Less Tech 2 Or Techline Terminal -> Light Truck & Vans -> Park Avenue -> Passenger Cars -> Passkey Module -> Passlock Learn Procedure -> PCM -> Powertrain Control Module (PCM) -> Powertrain Control Module (PCM) & Vehicle Control Module (VCM) -> Rear Integration Module -> Riviera -> Seville -> T50/T60/T20+ -> TDC Offset Adjustment -> Theft Deterrent System Programming -> VCM -> With Tech 2 -> With Techline Terminal & Scan Tool
Vehicle: 2003 Buick Regal LS 3.8 V6 GAS
Passenger Cars
Body Control Module (BCM)
Alero & Grand Am
This procedure must be performed if the BCM, Passlock sensor or PCM is replaced. If BCM is not properly programmed, it will not control all the features properly.
- Ensure battery is fully charged and ignition switch is in the ON position.
- Connect a suitably programmed Tech II, or equivalent, scan tool to Data Link Connector (DLC).
- Access scan tool "Special Functions" menu and follow scan tool instructions to program BCM.
- If BCM fails to accept the pr...
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BRAKE SERVICE PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
Hydraulic Brake Systems -> General Motors -> Component Service -> Assemble -> Aurora, Bonneville, Eighty-Eight, LeSabre, Park Avenue & Riviera -> Corvette -> CTS -> Disassemble -> Except Aurora, Bonneville, Corvette, CTS, Eighty-Eight, LeSabre, Park Avenue, Riviera & Vibe -> Master Cylinder Overhaul -> Vibe -> Wheel Cylinder Overhaul
Vehicle: 2003 Buick Regal LS 3.8 V6 GAS
Master Cylinder Overhaul
Except Aurora, Bonneville, Corvette, CTS, Eighty-Eight, LeSabre, Park Avenue, Riviera & Vibe
Disassemble
Refer to Figs. and , when performing the following procedures.
- Disconnect and plug hydraulic lines.
- Remove mounting nuts and master cylinder.
- Remove reservoir cover and diaphragm. Discard old brake fluid in reservoir.
- Inspect cover and diaphragm.
- Remove fluid level switch, if equipped.
- On models equipped with compact master cylinder, remove proportioner valve, Fig. .
- On all models, depress primary piston and remove lock ring.
- Plug primary fluid outlet (outlet...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Buick Regal 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 Regal LS 3.8 V6 GAS
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 2003 Buick Regal LS 3.8 V6 GAS
To prevent personal injury and/or component damage, do not allow the weight of the vehicle to load the front wheels, or attempt to operate the vehicle, when the wheel drive shaft(s) or wheel drive shaft nut(s) are removed. To do so may cause the inner bearing race to separate, resulting in damage to brake and suspension components and loss of vehicle control.
Wheel drive shaft boots, seals and clamps should be protected from sharp objects any time service is performed on or near the wheel drive shaft(s). Damage to the boot(s), the seal(s) or the clamp(s) may cause lubrican...
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TIRE PRESSURE MONITORING SYSTEM PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
Component Locations
Vehicle: 2003 Buick Regal GS 3.8 V6 GAS
Refer to Figs. ...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
Starter, Replace
Vehicle: 2003 Buick Regal LS 3.8 V6 GAS
- Disconnect battery ground cable.
- Raise and support vehicle.
- Remove torque converter cover mounting bolts, then cover.
- Remove starter motor mount...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
Cabin Air Filter Service -> General Motors Corp./Saturn -> 1997-2005 Century, Regal, 1998-2002 Intrigue & 2000-05 Impala & Monte Carlo
Vehicle: 2003 Buick Regal GS 3.8 V6 GAS
Under normal operating conditions the cabin air filter should be replaced every 15,000 miles. In dusty areas change the cabin air filter more often.
- Place the windshield wipers in the up position by turning the ignition switch Off when the wipers reach the desired position.
- Open the hood.
- Lift the righthand side of the rear hood seal from the flange in the area of the rig...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
General Motors Corp./Saturn Cars -> Air Bag Warning Lamp ->
Vehicle: 2003 Buick Regal LS 3.8 V6 GAS
This lamp should light for a approximately 6-8 seconds when the ignition is turned on as a bulb check. If the air b...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
Radiator, Replace
Vehicle: 2003 Buick Regal LS 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 Regal AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Buick Regal GS 3.8 V6 GAS
- Remove the battery.
- Rotate the tensioner counterclockwise to remove the drive belt.
- Remove the supercharger belt from...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Buick Regal AUTOMOBILES
Component location diagrams for most 2003 Buick Regal cars and light trucks sold in the U.S. from 1990+.
Right Side Of Instrument Panel Diagram for 2003 Buick Regal GS 3.8 V6 GAS Components on diagram: |
Left Side Of Transmission Diagram for 2003 Buick Regal GS 3.8 V6 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 2003 Buick Regal AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Buick Regal cars and light trucks sold in the U.S.
2003 Buick Regal GS 3.8 V6 GAS Wiring Diagram Components on diagram: |
2003 Buick Regal GS 3.8 V6 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Buick Regal AUTOMOBILES
OEM TSB listings for most 2003 Buick Regal cars and light trucks sold in the U.S. from 1985+.
Document: Revised General Motors New Vehicle Tire Warranty Program Vehicle: 2003 Buick Regal GS 3.8 V6 GAS Auto Systems: |
Document: New Website for AFIT, TPM, and VDR Updates Vehicle: 2003 Buick Regal GS 3.8 V6 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Buick Regal AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 Buick Regal 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 Regal 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 Regal 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 Regal 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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