Auto Parts Search
2003 Buick Regal CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Buick REPAIR SHOPS DON'T WANT YOU TO KNOW
Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!Select Section
- 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
Vacuum & Wiring Diagrams -> Passenger Cars -> Impala & Monte Carlo
Vehicle: 2003 Buick Regal LS 3.8 V6 GAS
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal A/C & HEATER SERVICE PROCEDURES
BRAKE SERVICE PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
Drum Brakes -> Type 5 -> Inspection -> Adjuster Mechanism -> Backing Plate -> Brake Drums -> Brake Linings & Springs -> Parking Brake Cable
Vehicle: 2003 Buick Regal GS 3.8 V6 GAS
- If any components are of doubtful strength or quality due to heat discoloration, or are worn, replace them.
- Inspect wheel cylinder dust boots for signs of excessive wear or damage. If any leakage is apparent replace wheel cylinder.
- Clean dirt and/or rust from brake drum, backing plate and all other components. Do not use compressed air or dry brush to clean brake components. Many brake components contain asbestos fibers which, if inhaled, can cause serious injury. Clean brake components with a water soaked rag or a suitable vacuum cleaner to minimize airborne dust.
Brake Drums
Any time t...
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal BRAKE SERVICE PROCEDURES
FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
General Motors Corp./Saturn Passenger Cars -> Fuel Filter Replacement -> Except Aveo, Chevette 1.8L Diesel, Corvette, GTO, LaCrosse, Malibu (2004-06) & Malibu Maxx, Vibe, XLR, 2004-05 Corvette & 1998-2002 Metro & Prizm
Vehicle: 2003 Buick Regal GS 3.8 V6 GAS
Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.
Prior to disconnecting fuel lines, the fuel system pressure must be relieved to prevent accidental spray of fuel.
After the battery has been disconnected and reconnected, some abnormal driveability symptoms may occur. The vehicle may need to be driven while the v...
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal FUEL FILTER REPLACEMENT PROCEDURES
DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 2003 Buick Regal GS 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...
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES
TIRE PRESSURE MONITORING SYSTEM PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
Reset Procedures
Vehicle: 2003 Buick Regal LS 3.8 V6 GAS
The Low Tire Pressure indicator will turn On when the pressure in one of the tires becomes 12 psi. lower or higher then the other three. The TPMS uses the ABS (Anti-Lock Brake System) wheel speed sensors to determine if a tire is low by a variation in wheel speed.
- Inflate all tires to vehicle manufacturer's specifications.
- Place the ignition swi...
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal TIRE PRESSURE MONITORING SYSTEM PROCEDURES
STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
Alternator, Replace
Vehicle: 2003 Buick Regal LS 3.8 V6 GAS
- Disconnect battery ground cable.
- Remove serpentine drive belt tension by rotating drive belt tensioner counterclockwise using a suitable breaker bar.
- Remo...
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal STARTER & ALTERNATOR REPLACEMENT PROCEDURES
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 LS 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...
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES
MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
General Motors Corp./Saturn Cars -> Check Fuel Cap Lamp ->
Vehicle: 2003 Buick Regal GS 3.8 V6 GAS
The Check Fuel Cap Lamp will illuminate momentarily when the ignition switch is placed in the on position as a bulb check. If...
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal MAINTENANCE LAMP RESET PROCEDURES
RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Buick Regal AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 2003 Buick Regal LS 3.8 V6 GAS
Inlet
- Drain cooling system into a suitable container.
- Remove fuel injector sight shield.
- Release clamp on heater inlet hose using hose clamp pliers J 38185 or equivalent.
- Disconnect heater inlet hose from inlet pipe.
- Release clamp on heater inlet hose using hose clamp pliers J 38185 or equivalent.
- Disconnect heater inlet hose from heater core.
- Remove hose from vehicle.
- Reverse procedure to ...
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal RADIATOR & HOSE REPLACEMENT PROCEDURES
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...
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal SERPENTINE BELT SERVICE PROCEDURES
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+.
Lower Left Side Of Engine Diagram for 2003 Buick Regal GS 3.8 V6 GAS Components on diagram: |
Engine Harness To Knock Sensor Diagram for 2003 Buick Regal LS 3.8 V6 GAS Components on diagram: |
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal PARTS/COMPONENTS LOCATION DIAGRAMS!
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 LS 3.8 V6 GAS Wiring Diagram Components on diagram: |
2003 Buick Regal LS 3.8 V6 GAS Wiring Diagram Components on diagram: |
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal WIRING DIAGRAMS!
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: |
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal TECHNICAL SERVICE BULLETINS!
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
CLICK HERE TO GET FULL ACCESS TO 2003 Buick Regal SPECIFICATIONS DATA!
Shop online for auto body parts, engines, wheels, lights...
More parts |
Get the Complete Technical Service Bulletins! |
Access diagrams and repair information such as wiring diagrams, diagnosis and repair charts, manufacturer service bulletins, and OEM Part numbers of your 2003 Buick Regal vehicle. |
Access the Complete guide! |