2003 BUICK REGAL stop start

Service............................................................5-3
Doing Your Own Service Work.........................5-3
Adding Equipment to the Outside of
Your Vehicle..............................................5-4
Fuel................................................................5-4
Gasoline Octane............................................5-4
Gasoline Specifications....................................5-5
California Fuel...............................................5-5
Additives.......................................................5-5
Fuels in Foreign Countries...............................5-6
Filling Your Tank............................................5-6
Filling a Portable Fuel Container.......................5-8
Checking Things Under the Hood.....................5-8
Hood Release................................................5-9
Engine Compartment Overview.......................5-10
Engine Oil...................................................5-13
Supercharger Oil..........................................5-18
Engine Air Cleaner/Filter................................5-18
Automatic Transaxle Fluid..............................5-20
Engine Coolant.............................................5-22
Radiator Pressure Cap..................................5-25
Engine Overheating.......................................5-25
Cooling System............................................5-28Power Steering Fluid.....................................5-36
Windshield Washer Fluid................................5-38
Brakes........................................................5-39
Battery........................................................5-42
Jump Starting...............................................5-43
Headlamp Aiming...........................................5-48
Bulb Replacement..........................................5-50
Halogen Bulbs..............................................5-50
Headlamps..................................................5-51
Front Turn Signal and Parking Lamps..............5-52
Center High-Mounted
Stoplamp (CHMSL)....................................5-52
Taillamps, Turn Signal, and Stoplamps............5-53
Back-Up Lamps............................................5-54
Replacement Bulbs.......................................5-55
Windshield Wiper Blade Replacement..............5-55
Tires..............................................................5-56
Inflation — Tire Pressure...............................5-57
Tire Pressure Monitor System.........................5-58
Tire Inspection and Rotation...........................5-59
When It Is Time for New Tires.......................5-60
Buying New Tires.........................................5-61
Section 5 Service and Appearance Care
5-1
2003 - Regal OM

SAE 10W-30 is the viscosity grade recommended for
your vehicle. However, you can use SAE 5W-30 if
it’s going to be colder than 60°F (16°C) before your next
oil change. When it’s very cold, colder than 0°F
(-18°C), you should use an SAE 5W-30 oil. These
numbers on an oil container show its viscosity, or
thickness. Do not use other viscosity grade oils, such as
SAE 10W-40 or SAE 20W-50 under any conditions.
Notice:Use only engine oil with the American
Petroleum Institute Certied For Gasoline Engines
starburst symbol. Failure to use the recommended
oil can result in engine damage not covered by
your warranty.
GM Goodwrench
®oil meets all the requirements for
your vehicle.
If you are in an area of extreme cold, where the
temperature falls below–20°F (-29°C),itis
recommended that you use either and SAE 5W-30
synthetic oil or and SAE 0W-30 oil. Both will provide
easier cold starting and better protection for your engine
at extremely low temperatures.
Engine Oil Additives
Don’t add anything to your oil. The recommended oils
with the starburst symbol are all you will need for
good performance and engine protection.
When to Change Engine Oil
(GM Oil Life System™)
Your vehicle has a computer system that lets you know
when to change the engine oil andfilter. This is
based on engine revolutions and engine temperature,
and not on mileage. Based on driving conditions,
the mileage at which an oil change will be indicated can
vary considerably. For the oil life system to work
properly, you must reset the system every time the oil is
changed.
When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A CHANGE OIL SOON light will come on.
Change your oil as soon as possible within the next two
times you stop for fuel. It is possible that, if you are
driving under the best conditions, the oil life system may
not indicate that an oil change is necessary for over a
year. However, your engine oil andfilter must be
changed at least once a year and at this time the system
must be reset. Your dealer has GM-trained service
people who will perform this work using genuine GM
parts and reset the system. It is also important to check
your oil regularly and keep it at the proper level.
If the system is ever reset accidentally, you must change
your oil at 3,000 miles (5 000 km) since your last oil
change. Remember to reset the oil life system whenever
the oil is changed.
5-16
2003 - Regal OM

Underhood Fuse Block
Some fuses and relays are located in the underhood
fuse block on the passenger’s side of the vehicle in the
engine compartment. SeeEngine Compartment
Overview on page 5-10or more information on location.
Fuses Usage
1 Anti-Lock Brake System
2 Starter Solenoid
3Power Seats, Rear Window
Defogger Heated Seats
4High Blower, Hazard Flasher,
Stoplamps, Power Mirror, Door
Locks
5Ignition Switch, BTSI, Stoplamps,
Anti-Lock Brake System, Turn
Signals, Cluster, Air Bag, Daytime
Running Lamps Module
6 Cooling Fan
7Retained Accessory Power, Keyless
Entry, Data Link, Heating Ventilation
Air Conditioning Head, Cluster,
Radio, Auxiliary Power (Power
Drop), Cigarette Lighter
8Ignition Switch, Wipers, Radio,
Steering Wheel Controls, Body
Control Module, Auxiliary Power
(Power Drop), Power Windows,
Sunroof, Heating Ventilation Air
Conditioning Controls, Daytime
Running Lamps, Rear Window
Defogger Relay
5-90
2003 - Regal OM

Sensors.........................................................3-22
Service........................................................... 5-3
Adding Equipment to the Outside of Your
Vehicle..................................................... 5-4
Doing Your Own Work................................... 5-3
Engine Soon Light.......................................3-35
Publications Ordering Information...................7-10
Vehicle Soon Light.......................................3-41
Service Bulletins.............................................7-11
Service Engine Soon Light...............................3-35
Service Manuals.............................................7-10
Setting Preset Stations............................3-46, 3-50
Setting the Time.............................................3-45
Setting the Tone (Bass/Treble)..................3-47, 3-51
Sheet Metal Damage.......................................5-83
Shift Lock Release..........................................2-27
Shifting Into Park (P).......................................2-25
Shifting Out of Park (P)...................................2-27
Shoulder Belt Height Adjuster...........................1-14
Skidding........................................................4-16
Some Other Rainy Weather Tips.......................4-20
Special Fabric Cleaning Problems.....................5-79
Specifications, Capacities.................................5-92
Speedometer..................................................3-28
Split Folding Rear Seat
..................................... 1-6
Starter Switch Check
.......................................6-12
Starting Your Engine
.......................................2-19Steering........................................................4-12
Steering in Emergencies..................................4-13
Steering, Suspension and Front Drive Axle Boot
and Seal Inspection.....................................6-14
Steering Tips..................................................4-12
Steering Wheel Controls, Audio.........................3-57
Storage Areas
Center Console Storage Area........................2-35
Convenience Net.........................................2-36
Glove Box..................................................2-35
Storing the Flat Tire and Tools..........................5-75
Storing the Spare Tire and Tools.......................5-76
Stuck in Sand, Mud, Ice or Snow......................4-30
Sun Visors.....................................................2-15
Sunroof.........................................................2-36
T
Tachometer....................................................3-29
Taillamps
Turn Signal, and Stoplamps..........................5-53
TCS Warning Light..........................................3-33
Theft-Deterrent, Radio.....................................3-55
Theft-Deterrent Systems...................................2-16
PASS-Key
®II ..............................................2-16
Throttle System Inspection...............................6-15
Tilt Wheel........................................................ 3-5
13
2003 - Regal OM