2003 Oldsmobile Bravada fuel

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

Underbody Maintenance
Chemicals used for ice and snow removal and dust
control can collect on the underbody. If these are not
removed, accelerated corrosion (rust) can occur on
the underbody parts such as fuel lines, frame, floor pat]
and exhaust system even though they have corrosion
protection.
At least every spring, flush these materials from the
underbody with plain water. Clean any areas where mud
and debris can collect.
Dirt packed in close areas of
the frame should be loosened before being flushed.
Your dealer or an underbody car washing system can
do this for you.
Chemical Paint Spotting
Some weather and atmospheric conditions can create a
chemical fallout. Airborne pollutants can fall upon and
attack painted surfaces on your vehicle. This damage
can take two forms; blotchy, ringlet-shaped
discolorations, and small irregular dark spots etched into
the paint surface.
Although no defect in the paint job causes this,
GM will
repair, at no charge to the owner, the surfaces
of
new vehicles damaged by this fallout condition within
12 months or 12,000 miles (20 000 km) of purchase,
whichever occurs first.
GM Vehicle Care/Appearance
Materials
See your GM dealer for more information on purchasing
the following products.
5-83

Fuses
10
11 12
13 14
15 16
17
18
19
20
21 22
23
24
25
26
27
28
29
30
31
Usage
Powertrain Control Module B
Fog Lamps
Stop Lamp
Cigarette Lighter
Ignition Coils
Air Suspension Ride
TBD-Ignition
1
Crank
Air Bag
Electric Brake
Cooling Fan
Horn Ignition
E
Electronic Throttle Control
Instrument Panel Cluster, Driver
Information Center
Automatic Shift Lock Control System
Engine 1
Back-up Powertrain Control Module 1
Oxygen Sensor
Air Conditioning
Truck Body Controller
Fuses
32
33
34
35
36
50
51
52
Relays
37
38
39
40
41
42
43
44
45
46 47
Usage
Trailer
Anti-Lock Brakes (ABS) Ignition A
Blower Motor Ignition B Passenger’s Side Trailer Turn
Driver’s Side Trailer Turn
Hazard Flashers
Usage
Blank Rear Window Washer
Fog Lamps
Horn Fuel Pump
Windshield WipersNasher
High-Beam Headlamp
Air Conditioning
Cooling Fan
Headlamp Driver Module
Starter
Miscellaneous Usage
48 Instrument Panel Battery
49 Fuse Puller
5-89

Normal Maintenance Replacement Parts
Part
GM Part No. 24200796
Automatic Transmission Filter Kit A201 4C*
Engine Air Cleaner P F58*
Engine
Oil Filter Number
~~ ~
Spark Plugs
*ACDelco@ part
number 14.0
inches
(35.6 em) Backglass Wiper Blade
20.0 inches (50.8 cm)
Windshield Wiper Blade
GF831* Fuel Filter 41
-981
*
5-94

6 Maintenance Schedule
Maintenance Schedule ...................................... 6-2
Introduction
................................................... 6-2
Maintenance Requirements
.............................. 6-2
How This Section is Organized ......................... 6-3
Part A: Scheduled Maintenance Services
........... 6-4
Using Your Maintenance Schedule
.................... 6-4
Scheduled Maintenance
................................... 6-5
Part
B: Owner Checks and Services ................ 6-10
At Each Fuel Fill
.......................................... 6-10
At Least Once a Month
................................. 6-10
At Least Twice a Year
................................... 6-11
Your
Vehicle and the Environment
.................... 6-2 At
Least Once a Year
................................... 6-12
Part
C: Periodic Maintenance Inspections ......... 6.15
Boot and Seal Inspection
............................ 6.15
Exhaust System Inspection
............................ 6.15
Fuel System Inspection
.................................. 6.15
Engine Cooling System Inspection
................... 6.15
Brake System Inspection
................................ 6-16
Part E: Maintenance Record
........................... 6.19
Steering, Suspension and Front Drive
Axle
Transfer Case and Front Axle
(All-Wheel Drive) Inspection
........................ 6.16
Part D: Recommended Fluids and Lubricants
.... 6-17
6- 1

Part A: Scheduled Maintenance
Services
This part contains engine oil scheduled maintenance
which explains the engine oil life system and how
it indicates when to change the engine oil and filter.
Also, listed are scheduled maintenance services which
are
to be performed at the mileage intervals specified.
Using Your Maintenance Schedule
We at General Motors want to help you keep your
vehicle in good condition. But we don’t know exactly how
you’ll drive it. You may drive very short distances only
a few times a week. Or you may drive long distances in
very hot, dusty weather. You may use your vehicle in
making deliveries. Or you may drive it to work,
to
do errands or in many other ways.
Because
of all the different ways people use their
vehicles, maintenance needs vary. You may need more
frequent checks and replacements.
So please read
the following and note how you drive.
If you have any
questions on how
to keep your vehicle in good condition,
see your dealer. This part tells you the
maintenance services you should
have done and when you should schedule them.
When you
go to your dealer for your service needs,
you’ll know that GM-trained and supported service
people will perform the work using genuine GM parts.
The proper fluids and lubricants
to use are listed in
Part
D. Make sure whoever services your vehicle uses
these.
All parts should be replaced and all necessary
repairs done before you or anyone else drives the
vehicle.
This schedule is for vehicles that:
carry passengers and cargo within recommended
limits. You will find these limits on your vehicle’s
Certificationflire label. See
Loading Your Vehicle on
page
4-4 1.
are driven on reasonable road surfaces within legal
driving limits.
are driven off-road in the recommended manner.
See
Operating Your All- Wheel-Drive Vehicle Off
Paved Roads on page 4- 15.
use the recommended fuel. See Gasoline Octane
on page 5-5.
6-4

Scheduled Maintenance
The services shown in this schedule up to 100,000 miles
(166 000 km) should be repeated after 100,000 miles
(166 000 km) at the same intervals for the life of
this vehicle. The services shown at
150,000 miles
(240 000 km) should be repeated at the same interval
after
150,000 miles (240 000 km) for the life of this
vehicle.
See
Part B: Owner Checks and Services on page 6- 10
and Part C: Periodic Maintenance Inspections on
page 6- 15.
Footnotes
t The US. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior
to
the completion of the vehicle 's useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the
maintenance be recorded.
+ A good time to check your brakes is during tire
rotation. See Brake System Inspection
on page 6- 16.
Engine Oil Scheduled Maintenance
Change engine oil and filter as indicated by the GM
Oil Life System (or every 12 months, whichever
occurs first). Reset the system.
Your vehicle has a computer system that lets you know
when
to change the engine oil and filter. 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 ENGINE
OIL 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 and filter must be
changed at least once a year and at this time the system
must be reset.
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. See
Engine Oil on
page 5-13 for information on resetting the system.
After the services are performed, record the date, odometer reading and who performed the service on the
maintenance record pages in Part
E of this schedule.
An Emission Control Service.
6-5