2003 Oldsmobile Bravada radiator 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

100,000 Miles (166 000 km)
0 Replace spark plugs. An Emission Control Service.
0 Change automatic transmission fluid and filter if
the vehicle is mainly driven under one or more
of these conditions:
- In heavy city traffic where the outside
temperature regularly reaches
90°F (32°C) or
higher.
- In hilly or mountainous terrain.
- When doing frequent trailer towing.
- Uses such as found in taxi, police or delivery
service.
0 If you haven’t used your vehicle under severe service
conditions listed previously and, therefore, haven’t
changed your automatic transmission fluid, change
both the fluid and filter
U Change transfer case fluid.
150,000 Miles (240 000 km)
U Drain, flush and refill cooling system (or every
60 months since last service, whichever occurs first).
See
Engine Coolant on page 5-22 for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.
An Emission Control Service.
0 Inspect engine accessory drive belt. An Emission
Control Service.
6-9

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

Power (cont.) Door Locks
.................................................. 2-9
Electrical System
......................................... 5-86
Lumbar Controls
........................................... 1-2
Reclining Seatbacks
...................................... 1-4
Reduced Engine Light
.................................. 3-40
Seat
............................................................ 1-2
Steering Fluid
............................................. 5-33
Windows
.................................................... 2-1 5
Power Steering ............................................... 4-10
Programmable Automatic Door Locks
.... ..... 2-10
Programmable Unlocking Feature
.................. 2-1 1
Programmable Locking Feature ..................... 2-1 0
Programming the HomeLink Transmitter ............. 2-37
Questions and Answers About Safety Belts 1-12
Radiator Pressure Cap
.................................... 5-24
Radios
.......................................................... 3-56
Care of Your Cassette Tape Player
................ 3-90
Care
of Your CD and DVD Player .................. 3-91
Care
of Your CDs and DVDs ........................ 3-91
Radio Personalization
................................... 3-88
Radio with Cassette and CD
......................... 3-57
Radio with Six-Disc CD
................................ 3-66
Rear Seat Audio
.......................................... 3-87 Radios (cont.)
Setting the Time
...................................... 3-56
Theft-Deterrent
............................................ 3-88
Understanding Reception
.............................. 3-89
RainsenseTM Wipers
.......................................... 3-9
RDS Messages
...................................... 3-61, 3-71
Reading Lamps
.............................................. 3-18
REAR ACCESS OPEN
.................................... 3-53
Rear Axle
...................................................... 5-46
Lockina
...................................................... 4-10
Rear
Rear
Rear
Rear
Rear
Reat
Rear
Rear Reat
Rear
Rear Climate Control System 3-25
v
............................
Door Security Locks ................................ 2-12
Floor Storage Lid
.................................... 2-43
Seat Audio (RSA)
.................................... 3-87
Seat Entertainment System
....................... 3-76
Seat Operation
......................................... 1-6
Seat Passenger Positions
......................... 1-21
Seat Passengers, Safety Belts
.................. 1-21
Underseat Fuse Block
.............................. 5-90
Window Defogger
.................................... 3-24
Safety
Belt Comfort Guides
...................... 1-24
Rearview Mirror. Automatic Dimming with
Onstar@ and Compass
................................. 2-30
Reclining Seatbacks. Power
............................... 1-4
Recreational Vehicle Towing
............................. 4-41
Reduced Engine Power Light
............................ 3-40
Remote Control
.............................................. 3-81
Remote Keyless Entry System
............................ 2-4
Remote Keyless Entry System, Operation
............ 2-5
11