maintenance BUICK REGAL 2002 Owner's Manual

1-28 Servicing Your Air Bag-Equipped Vehicle
Air bags affect how your vehicle should be serviced.
There are parts of the air bag systems in several places
around your vehicle. Your dealer and the service manual
have information about servicing your vehicle and the
air bag systems. To purchase a service manual, see
ªService and Owner Publicationsº in the Index.
CAUTION:
For up to 10 seconds after the ignition key is
turned off and the battery is disconnected, an air
bag can still inflate during improper service. You
can be injured if you are close to an air bag when
it inflates. Avoid yellow connectors. They are
probably part of the air bag systems. Be sure to
follow proper service procedures, and make sure
the person performing work for you is qualified
to do so.
The air bag systems do not need regular maintenance.
Rear Seat Passengers
It's very important for rear seat passengers to buckle up!
Accident statistics show that unbelted people in the rear
seat are hurt more often in crashes than those who are
wearing safety belts.
Rear passengers who aren't safety belted can be thrown
out of the vehicle in a crash. And they can strike others
in the vehicle who are wearing safety belts.
Rear Seat Outside Passenger Positions
Lap-Shoulder Belt
The positions next to the windows have lap
-shoulder
belts. Here's how to wear one properly.

1-58
Safety Belt Extender
If the vehicle's safety belt will fasten around you,
you should use it.
But if a safety belt isn't long enough to fasten, your
dealer will order you an extender. It's free. When you go
in to order it, take the heaviest coat you will wear, so the
extender will be long enough for you. The extender will
be just for you, and just for the seat in your vehicle that
you choose. Don't let someone else use it, and use it
only for the seat it is made to fit. To wear it, just attach it
to the regular safety belt.
Checking Your Restraint Systems
Now and then, make sure the safety belt reminder light
and all your belts, buckles, latch plates, retractors and
anchorages are working properly. Look for any other
loose or damaged safety belt system parts. If you see
anything that might keep a safety belt system from
doing its job, have it repaired.
Torn or frayed safety belts may not protect you in a
crash. They can rip apart under impact forces. If a belt
is torn or frayed, get a new one right away.
Also look for any opened or broken air bag covers, and
have them repaired or replaced. (The air bag system
does not need regular maintenance.)
Replacing Restraint System Parts
After a Crash
If you've had a crash, do you need new belts or LATCH
system parts?
After a very minor collision, nothing may be necessary.
But if the belts were stretched, as they would be if worn
during a more severe crash, then you need new parts.
If the LATCH system was being used during a more
severe crash, you may need new LATCH system parts.
If belts are cut or damaged, replace them. Collision
damage also may mean you will need to have LATCH
system, safety belt or seat parts repaired or replaced.
New parts and repairs may be necessary even if the
belt or LATCH system wasn't being used at the time
of the collision.
If an air bag inflates, you'll need to replace air bag
system parts. See the part on the air bag system earlier
in this section.

2-75 Malfunction Indicator Lamp
(Service Engine Soon Light)
Your vehicle is equipped
with a computer which
monitors operation of the
fuel, ignition and emission
control systems.
This system is called OBD II (On
-Board
Diagnostics
-Second Generation) and is intended to
assure that emissions are at acceptable levels for the life
of the vehicle, helping to produce a cleaner
environment. The SERVICE ENGINE SOON light
comes on and a chime will sound to indicate that there
is a problem and service is required. Malfunctions often
will be indicated by the system before any problem is
apparent. This may prevent more serious damage to
your vehicle. This system is also designed to assist
your service technician in correctly diagnosing
any malfunction.
NOTICE:
If you keep driving your vehicle with this light
on, after a while, your emission controls may not
work as well, your fuel economy may not be as
good and your engine may not run as smoothly.
This could lead to costly repairs that may not be
covered by your warranty.
NOTICE:
Modifications made to the engine, transaxle,
exhaust, intake or fuel system of your vehicle or
the replacement of the original tires with other
than those of the same Tire Performance Criteria
(TPC) can affect your vehicle's emission controls
and may cause the SERVICE ENGINE SOON
light to come on. Modifications to these systems
could lead to costly repairs not covered by your
warranty. This may also result in a failure to pass
a required Emission Inspection/Maintenance test.

2-77
Are you low on fuel?
As your engine starts to run out of fuel, your engine may
not run as efficiently as designed since small amounts of
air are sucked into the fuel line causing a misfire. The
system can detect this. Adding fuel should correct this
condition. Make sure to install the fuel cap properly. See
ªFilling Your Tankº in the Index. It will take a few
driving trips to turn the light off.
Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel. See
ªFuelº in the Index. Poor fuel quality will cause your
engine not to run as efficiently as designed. You may
notice this as stalling after start
-up, stalling when you put
the vehicle into gear, misfiring, hesitation on acceleration
or stumbling on acceleration. (These conditions may go
away once the engine is warmed up.) This will be detected
by the system and cause the light to turn on.
If you experience one or more of these conditions,
change the fuel brand you use. It will require at least one
full tank of the proper fuel to turn the light off.
If none of the above steps have made the light turn off,
have your dealer or qualified service center check the
vehicle. Your dealer has the proper test equipment and
diagnostic tools to fix any mechanical or electrical
problems that may have developed.Emissions Inspection and Maintenance Programs
Some state/provincial and local governments have
or may begin programs to inspect the emission
control equipment on your vehicle. Failure to pass
this inspection could prevent you from getting a
vehicle registration.
Here are some things you need to know in order to help
your vehicle pass an inspection:
Your vehicle will not pass this inspection if the
SERVICE ENGINE SOON light is on or not
working properly.
Your vehicle will not pass this inspection if the OBD
(on-board diagnostic) system determines that critical
emission control systems have not been completely
diagnosed by the system. The vehicle would be
considered not ready for inspection. This can happen
if you have recently replaced your battery or if your
battery has run down. The diagnostic system is designed
to evaluate critical emission control systems during
normal driving. This may take several days of routine
driving. If you have done this and your vehicle still
does not pass the inspection for lack of OBD system
readiness, see your dealer or qualified service center to
prepare the vehicle for inspection.

2-82 Low Fuel Light
United States Canada
If your fuel is low, a circular light on your instrument
panel cluster will come on and stay on and a chime will
sound periodically until you add fuel.
It will also come on for a few seconds when you first
turn on the ignition as a check to show you it's working.
If it doesn't come on then, have it fixed.
Driver Information Center (Option)
The Driver Information Center (DIC), located below the
tachometer on the instrument panel cluster, gives you
important safety and maintenance facts. When you turn
the ignition on, the entire center lights up for just a
few seconds.
3800 V6 Engine

2-84 Modes
AVG ECON (Average Economy): Shows your average
fuel economy since you last reset this mode. Average
fuel economy is viewed as a long term approximation of
your overall driving and driving conditions. To learn the
average fuel economy from a new starting point, press
the RESET button while the average fuel economy is
displayed in the DIC.
INSTANTANEOUS FUEL ECONOMY: Shows your
current fuel economy. Instantaneous fuel economy
varies with your driving conditions, such as
acceleration, braking and the grade of the road being
traveled. The instantaneous fuel economy display cannot
be reset, therefore the reset button has no effect while in
this mode.OIL LIFE MONITOR: Shows an estimate of the oil's
remaining useful life. When the oil life index is less than
10%, the CHANGE OIL SOON light will come on.
When you have the oil changed according to the
maintenance schedule (see ªMaintenance Scheduleº in
the Index), you will have to reset the CHANGE OIL
SOON light.
To reset the CHANGE OIL SOON light, see ªOil Life
Systemº in the Index.
Also, see ªEngine Oil, When to Changeº and
ªMaintenance Scheduleº in the Index.
RANGE: Shows the approximate distance you can
drive without refueling. This is based on the amount of
fuel in the tank and on the fuel economy of the most
recent 25 miles (40 km). Pressing RESET while in this
mode will have no effect.
BOOST GAGE: If you have the supercharged engine,
this gage will show the amount of boost your engine is
receiving. Pressing RESET while in this mode will have
no effect.

3-2
Comfort Controls
Dual ComforTemp
Climate Control
With this system, the driver and passenger can maintain
separate temperatures in their seating areas. The system
works best if you keep your windows closed while using it.
FAN:
Turn the knob clockwise toward HI to increase fan
speed and counterclockwise toward LO to decrease
fan speed. The fan must be turned on for the air
conditioning compressor to operate.
If the airflow seems very low when the fan is adjusted
to the highest setting regardless of the mode setting,
your passenger compartment air filter may need to be
replaced. See ªMaintenance Scheduleº or ªPassenger
Compartment Air Filterº in the Index.
OFF: To turn off the fan, turn the knob all the way
counterclockwise to off.
DRIVER (Driver's Side Temperature):
The lever on the left adjusts the air temperature on the
driver's side outlets independent of the temperature set by
the passenger. Slide the lever up to raise the temperature.
Slide the lever down to lower the temperature.
PASSENGER (Passenger's Side Temperature):
The lever on the right adjusts the air temperature on the
passenger's side independent of the temperature set by
the driver. Slide the lever up to raise the temperature.
Slide the lever down to lower the temperature.

3-9 Ventilation System
Adjust the direction of
airflow by moving the
vent levers.
Your vehicle's flow
-through ventilation system supplies
outside air into the vehicle when it is moving. Outside
air will also enter the vehicle when the air conditioning
fan is running.
If the airflow seems very low when the fan is adjusted to
the highest setting regardless of the mode setting, your
passenger compartment air filter may need to be
replaced. See ªMaintenance Scheduleº or ªPassenger
Compartment Air Filterº in the Index.Ventilation Tips

Keep the hood and front air inlet free of ice, snow or
any other obstruction, such as leaves. The heater and
defroster will work far better, reducing the chance of
fogging the inside of your windows.

When you enter a vehicle in cold weather, adjust the
mode knob or button to FLOOR and the fan to the
highest speed for a few seconds before driving off.
This helps clear the intake ducts of snow and
moisture and reduces the chance of fogging the
inside of your windows.

Keep the air path under the front seats clear of
objects. This helps air to circulate throughout
your vehicle.

For mild outside temperatures, when little heating or
cooling is needed, use VENT to direct outside air
through your vehicle.

4-42 When You Are Ready to Leave After
Parking on a Hill
1. Apply your regular brakes and hold the pedal down
while you:

start your engine,

shift into a gear, and

release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you're
pulling a trailer. See the Maintenance Schedule for more
on this. Things that are especially important in trailer
operation are automatic transaxle fluid (don't overfill),
engine oil, drive belt, cooling system and brake system.
Each of these is covered in this manual, and the Index
will help you find them quickly. If you're trailering, it's
a good idea to review this information before you start
your trip.
Check periodically to see that all hitch nuts and bolts
are tight.
Engine Cooling When Trailer Towing
Your cooling system may temporarily overheat during
severe operating conditions. See ªEngine Overheatingº
in the Index.

6-
6-1
Section 6 Service and Appearance Care
Here you will find information about the care of your vehicle. This section begins with service and fuel information,
and then it shows how to check important fluid and lubricant levels. There is also technical information about your
vehicle, and a part devoted to its appearance care.
6
-2 Service
6
-3 Fuel
6
-5 Fuels in Foreign Countries
6
-6 Filling Your Tank
6
-8 Filling a Portable Fuel Container
6
-8 Checking Things Under the Hood
6
-12 Engine Oil
6
-18 Engine Air Cleaner/Filter
6
-19 Passenger Compartment Air Filter
6
-20 Supercharger Oil
6
-21 Automatic Transaxle Fluid
6
-25 Engine Coolant
6
-29 Power Steering Fluid
6
-30 Windshield Washer Fluid
6
-31 Brakes
6
-35 Battery
6
-36 Bulb Replacement
6
-43 Windshield Wiper Blade Replacement6
-44 Tires
6
-55 Appearance Care
6
-55 Cleaning the Inside of Your Vehicle
6
-58 Cleaning Glass Surfaces
6
-59 Cleaning the Outside of the Windshield and
Wiper Blades
6
-59 Cleaning the Outside of Your Vehicle
6
-61 Cleaning Aluminum or Chrome-Plated
Wheels (If Equipped)
6
-61 Cleaning Tires
6
-63 GM Vehicle Care/Appearance Materials
6
-64 Vehicle Identification Number (VIN)
6
-65 Electrical System
6
-71 Replacement Bulbs
6
-72 Capacities and Specifications
6
-72 Air Conditioning Refrigerant Capacity
6
-72 Normal Maintenance Replacement Parts