2003 Oldsmobile Bravada fuel cap

Engine Fan Noise
6. Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine cooling fan.
7. By this time, the coolant level inside the radiator
filler neck may be lower.
If the level is lower, add
more of the proper
DEX-COOL@ coolant mixture
through the filler neck until the level reaches
the base of the filler neck.
8. Then replace the pressure cap. At any time during
this procedure
if coolant begins to flow out of the
filler neck, reinstall the pressure cap. Be sure
the pressure cap is hand-tight. This vehicle has a clutched engine cooling
fan. When
the clutch is engaged, the fan spins faster to provide
more air to cool the engine. In most everyday driving
conditions the clutch is not engaged. This improves fuel
economy and reduces fan noise. Under heavy vehicle
loading, trailer towing, and/or high outside temperatures,
the fan speed increases when the clutch engages.
So
you may hear an increase in fan noise. This is
normal and should not be mistaken as the transmission
slipping or making extra shifts.
It is merely the cooling
system functioning properly. The fan will slow down
when additional cooling is not required and the clutch
disengages.
You may also hear this fan noise when you start the
engine.
It will go away as the fan clutch disengages.
5-32

Inflation -- Tire Pressure
The Certificationnire label, which is on the driver’s door
edge, above the door latch, shows the correct inflation
pressures for your tires when they’re cold. “Cold” means
your vehicle has been sitting
for at least three hours
or driven no more than
1 mile (1.6 km).
Notice: Don’t let anyone tell you that underinflation
or overinflation
is all right. It’s not. If your tires
don’t have enough air (underinflation), you can get
the following:
0 Too much flexing
Too much heat
0 Tire overloading
Bad wear
0 Bad handling
0 Bad fuel economy
If your tires have too much air (overinflation), you
can get the following:
0 Unusual wear
0 Bad handling
0 Rough ride
Needless damage from road hazards
When to Check
Check your tires once a month or more.
Also, check the tire pressure of the spare tire.
Use a good quality pocket-type gage to check tire
pressure.
You can’t tell if your tires are properly inflated
simply by looking at them. Radial tires may look
properly inflated even when they’re underinflated.
Be sure
to put the valve caps back on the valve stems.
They help prevent leaks by keeping
out dirt and moisture.
Tire Inspection and Rotation
Tires should be rotated every 7,500 miles (12 500 km).
Any time you notice unusual wear, rotate your tires
as soon as possible and check wheel alignment.
Also
check for damaged tires or wheels. See When It Is Time
for New Tires
on page 5-55 and Wheel Replacement
on page 5-58 for more information.
Make sure the spare tire
is stored securely. Push, pull,
and then try
to rotate or turn the tire. If it moves,
use the wheel wrench to tighten the cable. See
Changing a Flat Tire on page 5-62.
5-53

Part C: Periodic Maintenance
Inspections
Listed in this part are inspections and services which
should be performed at least twice a year (for instance,
each spring and fall).
You should let your dealer’s
service department or other qualified service center do
these jobs. Make sure any necessary repairs are
completed at once.
Proper procedures to perform these services may be
found in a service manual. See
Service Publications
Ordering Information
on page 7- 10.
Steering, Suspension and Front
Drive Axle
Boot and Seal Inspection
Inspect the front and rear suspension and steering
system for damaged, loose or missing parts, signs of
wear or lack of lubrication. Inspect the power steering
lines and hoses for proper hook-up, binding, leaks,
cracks, chafing, etc. Clean and then inspect the drive
axle boot seals for damage, tears or leakage. Replace
seals
if necessary.
Exhaust System Inspection
Inspect the complete exhaust system. Inspect the body
near the exhaust system. Look for broken, damaged,
missing or out-of-position parts as well as open seams,
holes, loose connections or other conditions which
could cause a heat build-up in the floor pan or could let
exhaust fumes into the vehicle. See
Engine Exhaust
on page 2-28.
Fuel System Inspection
Inspect the complete fuel system for damage or leaks.
Engine Cooling System Inspection
Inspect the hoses and have them replaced if they
are cracked, swollen or deteriorated. Inspect all pipes,
fittings and clamps; replace as needed. Clean the
outside of the radiator and air conditioning condenser.
To help ensure proper operation, a pressure test
of
the cooling system and pressure cap is recommended
at least once a year.
6-1 5

Automatic Headlamp System ............................ 3-1 5
Automatic Transmission
Fluid
.......................................................... 5-20
Operation
................................................... 2-22
Automatic Transmission Check
.......................... 6-1 1
Automatic Transmission Shift Lock Control
System Check
....................................... ... 6-13
Backglass Wiper Blade Replacement
................. 5-51
Battery
.......................................................... 5-38
Battery Replacement
......................................... 2-6
Battery Run-Down Protection
............................ 3-1 9
Before Leaving on a Long Trip
......................... 4-33
Before You Drive
............................................ 3-76
Before You Go Off-Roading
.............................. 4-16
Body Lubrication Service
.................................. 6-12
Brake
Parking
...................................................... 2-25
System Inspection
....................................... 6-1 6
System Warning Light
.................................. 3-33
Brake Adjustment
............................................ 5-37
Brake Fluid
.................................................... 5-34
Brake Pedal Travel
..................................... 5-37
Brake Wear
............................................... 5-36
Brakes
.......................................................... 5-34
Braking
........................................................... 4-6
Backing
Up
.................................................... 4-51
BATTERY NOT CHARGING
............................. 3-53 Braking
in Emergencies
..................................... 4-8
Break.ln. New Vehicle
..................................... 2-18
Bulb Replacement
........................................... 5-47
Replacement Bulbs
...................................... 5-48
Buying New Tires
........................................... 5-56
Taillamps
and Turn Signal Lamps
.................. 5-47
C
California Fuel .................................................. 5-6
Canada
........................................................... 7-4
Canadian Owners
................................................ ii
Canadian Roadside Assistance ........................... 7-7
Capacities and Specifications
............................ 5-93
Care of
Carbon Monoxide
................... 4-36,
4-45, 2-13, 2-28
Safety Belts
................................................ 5-80
Your Cassette Tape Player
............................ 3-90
Your CD and DVD Player
............................. 3-91
Your CDs and DVDs
.................................... 3-91
Cargo Cover
.................................................. 2-44
Cargo Tie Downs
............................................ 2-45
Cassette Tape Messages
................................. 3-64
Cassette Tape Player Service
........................... 6-10
Center Seat Position, Child Restraints
................ 1-45
Chains, Tires
.............................................. 5-60
Charging System Light
................................ 3-32
Check
Engine Light
........................................... 3-35
Gages Warning Light
................................... 3-41
2