1999 Oldsmobile Bravada cooling

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6-24
NOTICE:
If you use an improper coolant mixture, your
engine could overheat and be badly damaged.
The repair cost wouldn't be covered by your
warranty. Too much water in the mixture can
freeze and crack the engine, radiator, heater core
and other parts.
If you have to add coolant more than four times a year,
have your dealer check your cooling system.
NOTICE:
If you use the proper coolant, you don't have to
add extra inhibitors or additives which claim to
improve the system. These can be harmful.
Checking Coolant
The vehicle must be on a level surface. When your
engine is cold, the coolant level should be at ADD, or a
little higher. When your engine is warm, the level should
be up to FULL HOT, or a little higher.

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6-43 Wheel Alignment and Tire Balance
The wheels on your vehicle were aligned and balanced
carefully at the factory to give you the longest tire life
and best overall performance.
Scheduled wheel alignment and wheel balancing are not
needed. However, if you notice unusual tire wear or
your vehicle pulling one way or the other, the alignment
may need to be reset. If you notice your vehicle
vibrating when driving on a smooth road, your wheels
may need to be rebalanced.
Wheel Replacement
Replace any wheel that is bent, cracked, or badly rusted
or corroded. If wheel nuts keep coming loose, the wheel,
wheel bolts and wheel nuts should be replaced. If the
wheel leaks air, replace it (except some aluminum
wheels, which can sometimes be repaired). See your
dealer if any of these conditions exist.
Your dealer will know the kind of wheel you need.
Each new wheel should have the same load
-carrying
capacity, diameter, width, offset and be mounted the
same way as the one it replaces.
If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new GM original
equipment parts. This way, you will be sure to have the
right wheel, wheel bolts and wheel nuts for your vehicle.
CAUTION:
Using the wrong replacement wheels, wheel bolts
or wheel nuts on your vehicle can be dangerous.
It could affect the braking and handling of your
vehicle, make your tires lose air and make you
lose control. You could have a collision in which
you or others could be injured. Always use the
correct wheel, wheel bolts and wheel nuts
for replacement.
NOTICE:
The wrong wheel can also cause problems with
bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper
height, vehicle ground clearance and tire
clearance to the body and chassis.
See ªChanging a Flat Tireº in the Index for
more information.

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6-60
Replacement Bulbs
Lamps Quantity Number
Halogen Headlamps, Composite Low Beam 2 9006 HB4
Halogen Headlamps, Composite High Beam 2 9005 HB3
Tail and Stoplamps 4 3057
Front Sidemarker Lamps 2 194
Front Turn Signal Lamps 2 3157NA
Turn Signal Lamps 2 3157 NA
Capacities and Specifications
Engine Description ªVORTECº 4300 V6. . . . . . . . .
Type V6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VIN Code W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Firing Order 1
-6-5-4-3-2 . . . . . . . . . . . . . . . . . . . . . .
Horsepower 190 at 4,400 rpm. . . . . . . . . . . . . . . . . . .
Thermostat Specification 195
F (91
C) . . . . . . . . . . .
Spark Plug Gap 0.060 inches (1.52 mm). . . . . . . . . .
Wheels and Tires
Wheel Nut Torque 100 lb-ft (140 N´m) . . . . . . . . . . .
Tire Pressure Look at the Certification/Tire label. . .
See ªLoading Your Vehicleº in the Index.
Capacities (Approximate)
Cooling System* 11.7 quarts (11.1 L). . . . . . . . . . . . .
Crankcase with Filter* 4.5 quarts (4.3 L). . . . . . . . . .
Automatic Transmission
(Drain and Refill)* 5.0 quarts (4.7 L). . . . . . . . . . .
Differential Fluid (Rear) 4.0 pints (1.9 L). . . . . . . . .
Differential Fluid (Front) 2.6 pints (1.2 L). . . . . . . . .
Fuel Tank 18.0 gallons (68.0 L). . . . . . . . . . . . . . . . . .
A/C Refrigerant 1.75 lbs (0.79 kg) of R
-134a . . . . . . .
*After refill, the level must be checked.

Scheduled Maintenance
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7-6
Short Trip/City Intervals
Every 100,000 Miles (166 000 km): Spark Plug Wire
Inspection. Spark Plug Replacement. Positive
Crankcase Ventilation (PCV) Valve Inspection.
Every 150,000 Miles (240 000 km): Cooling System
Service (or every 60 months, whichever occurs first).
These intervals only summarize maintenance services.
Be sure to follow the complete scheduled maintenance
on the following pages.
Long Trip/Highway Definition
Follow this scheduled maintenance only if none of the
conditions from the Short Trip/City Scheduled
Maintenance is true. Do not use this schedule if the
vehicle is used for trailer towing, driven in a dusty area
or used off paved roads. Use the Short Trip/City
schedule for these conditions.
Driving a vehicle with a fully warmed engine
under highway conditions causes engine oil to
break down slower.
Long Trip/Highway Intervals
Every 7,500 Miles (12 500 km): Engine Oil and Filter
Change (or every 12 months, whichever occurs first).
Chassis Lubrication (or every 12 months, whichever
occurs first). Drive Axle Service. Tire Rotation.
Every 15,000 Miles (25 000 km): Automatic
Transmission Service (severe conditions only).
Every 30,000 Miles (50 000 km): Fuel Filter
Replacement. Air Cleaner Filter Replacement.
Every 50,000 Miles (83 000 km): Automatic
Transmission Service (normal conditions).
Every 60,000 Miles (100 000 km): Engine Accessory
Drive Belt Inspection. Fuel Tank, Cap and Lines
Inspection.
Every 100,000 Miles (166 000 km): Spark Plug Wire
Inspection. Spark Plug Replacement. Positive
Crankcase Ventilation (PCV) Valve Inspection.
Every 150,000 Miles (240 000 km): Cooling System
Service (or every 60 months, whichever occurs first).
These intervals only summarize maintenance services.
Be sure to follow the complete scheduled maintenance
on the following pages.

Short Trip/City Scheduled Maintenance
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7-26
100,000 Miles (166 000 km)

Inspect spark plug wires.
An Emission Control Service.

Replace spark plugs.
An Emission Control Service.

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.

Inspect Positive Crankcase Ventilation (PCV) valve.
An Emission Control Service.
150,000 Miles (240 000 km)

Drain, flush and refill cooling system (or every 60 months since last service,
whichever occurs first). See ªEngine Coolantº in the Index for what to use.
Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test
cooling system and pressure cap.
An Emission Control Service.
ACTUAL
SERVICED BY:MILEAGE
DATE
ACTUAL
SERVICED BY:MILEAGE
DATE

Long Trip/Highway Scheduled Maintenance
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7-38
100,000 Miles (166 000 km)

Inspect spark plug wires.
An Emission Control Service.

Replace spark plugs.
An Emission Control Service.

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.

Inspect Positive Crankcase Ventilation (PCV) valve.
An Emission Control Service.
150,000 Miles (240 000 km)

Drain, flush and refill cooling system (or every 60 months since last service,
whichever occurs first). See ªEngine Coolantº in the Index 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.
ACTUAL
SERVICED BY:MILEAGE
DATE
ACTUAL
SERVICED BY:MILEAGE
DATE

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7-43
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 ªService and Owner
Publicationsº in the Index.
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 ªEngine Exhaustº in
the Index.
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.

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9-5
Halogen Bulbs 6-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hazard Warning Flashers 5-2 . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Restraints 1-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlamps 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Replacement 6-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High/Low Beam Changer 2-30 . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring 6-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hearing Impaired, Customer Assistance 8-4 . . . . . . . . . . . . . .
Heated Front Seats 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heated Outside Mirrors 2-40 . . . . . . . . . . . . . . . . . . . . . . . . . .
Heating 3-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Highway Hypnosis 4-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hill and Mountain Roads 4-35 . . . . . . . . . . . . . . . . . . . . . . . . .
Hitches, Trailer 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hood 6-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn 2-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydroplaning 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition
Positions 2-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmission Lock Check 7-42 . . . . . . . . . . . . . . . . . . . . . .
Illuminated Entry 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation, Tire 6-38, 7-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside Electrochromic Rearview Mirror 2-39 . . . . . . . . . . . . .
Inspections
Brake System 7
-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drive Axle 7-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Cooling System 7-43 . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust Systems 7-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Drive Axle Boot 7-43 . . . . . . . . . . . . . . . . . . . . . . . . . Steering 7
-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suspension 7-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle System 7-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transfer Case 7-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Panel 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cluster 2-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block 6-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Lamps 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jacking Equipment 5-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keyless Entry System 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 2-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Panic Alarm 2-7 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resynchronization 2-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keys 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Labels
Certification/Tire 4-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse 6-55, 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belt 1-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Parts Identification 6-53 . . . . . . . . . . . . . . . . . . . . .
Vehicle Identification Number 6-53 . . . . . . . . . . . . . . . . . . .
Lamps 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dome 2-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Reading 2-38, 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .