2003 Oldsmobile Bravada tow

Par1 . on Hills
You really should not park your vehicle, with a
trailer attached,
on a hill. If something goes
wrong, your
rig could start to move. People
can be injured, and both your vehicle and the
trailer can be damaged.
When You Are Ready to Leave After
Parking on a
Hill
1. Apply your regular brakes and hold the pedal down
while you:
But
if you ever have to park your rig on a hill, here’s
how to do it:
1. Apply your regular brakes, but don’t shift into
PARK (P) yet. When parking uphill, turn your wheels
away from the curb. When parking downhill, turn
your wheels into the curb.
2. Have someone place chocks under the trailer
wheels.
3. When the wheel chocks are in place, release the
4. Reapply the regular brakes. Then apply your
regular brakes until
the chocks absorb the load.
parking brake, and then shift into PARK
(P).
5. Release the regular brakes.
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 transmission fluid (don’t overfill),
engine oil, axle lubricant, 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 these sections
before you start your trip.
Check periodically
to see that all hitch nuts and bolts
are tight.
4-52

Trailer Wiring Harness
Your vehicle may be equipped with the seven-wire
trailer towing harness. This harness has a seven-pin
universal heavy-duty trailer connector that is attached to
a bracket on the hitch platform.
Yellow: Left Stop/Turn Signal
Dark Green: Right Stopnurn Signal
@ Brown: Running Lamps
White: Ground
Light Green: Back-up Lamps
Red: Battery Feed
Dark Blue: Electric Brakes
If you need to tow a light-duty trailer with a standard
four-way round pin connector, an adapter connector is
available from your dealer.
Your vehicle is also equipped with wiring for an electric
trailer brake controller. These wires are located inside the vehicle on the driver’s side under the
instrument panel. These wires should be connected to
an electric trailer brake controller by your dealer or
a qualified service center.
4-53

Checking Engine Oil
It’s a good idea to check your engine oil every time you
get fuel. In order
to get an accurate reading, the oil
must be warm and the vehicle must be on level ground.
The engine oil dipstick
handle is a yellow ring located in the engine
compartment toward the passenger’s side
of
the vehicle. See Engine
Compartment Overview on
page
5- 12 for more
information on location. Turn
off the engine and give the oil several minutes
to
drain back into the oil pan. If you don’t, the oil
dipstick might not show the actual level.
Pull out the dipstick and clean it with a paper towel or
cloth, then push
it back in all the way. Remove it again,
keeping the tip down, and check the level.
5-1 4

When to Add Engine Oil
If the oil is at or below the L mark, then you’ll need to
add at least one quart of oil. But you must use the right
kind. This part explains what kind
of oil to use. For
engine oil crankcase capacity, see Capacities and
Specifications on page 5-93.
Notice: Don’t add too much oil. If your engine has
so much oil that the oil level gets above the F
mark that shows the proper operating range, your
engine could be damaged.
SAE 5W-30
a
The engine oil fill cap is
located in the engine
compartment toward the
passenger’s side of
the vehicle. See
Engine
Compartment
Overview on
page 5-72 for more
LV
information on location.
Be sure to
fill it enough to put the level somewhere in
the proper operating range. Push
the dipstick all the way
back in when you’re through.
5-1 5

How to Reset the CHANGE ENG OIL Light
The GM Oil Life System calculates when to change
your engine oil and filter based on vehicle use. Anytime
your oil is changed, reset the system
so it can
calculate when the next oil change is required. If a
situation occurs where you change your oil prior to a
CHANGE ENG OIL light being turned on, reset the
system.
To reset the CHANGE ENG OIL light, do the following:
1. Turn the ignition key to RUN with the
2. Fully press and release the accelerator pedal three
engine
off.
times within five seconds.
For vehicles with the Driver Information Center, see
Driver Information Center (DE) on page 3-43 to reset
the system.
What to Do with Used Oil
Used engine oil contains certain elements that may be
unhealthy for your skin and could even cause cancer.
Don’t let used oil stay on your skin for very long. Clean
your skin and nails with soap and water, or a good
hand cleaner. Wash or properly dispose of clothing or
rags containing used engine oil. See the manufacturer’s
warnings about the use and disposal of oil products. Used oil can be a threat
to the environment. If you
change your own oil, be sure to drain all the oil from the
filter before disposal. Never dispose
of oil by putting it
in the trash, pouring it on the ground, into sewers, or into
streams
or bodies of water. Instead, recycle it by
taking it to a place that collects used oil. If you have a
problem properly disposing
of your used oil, ask
your dealer, a service station or a local recycling center
for help.
Engine Air CleanedFilter
The engine air cleanedfilter
is located toward the front
of the engine compartment
on the passenger’s side
of the vehicle.
See
Engine Compartment Overview on page 5-12 for
more information on engine air cleaner filter location.
5-1 8

Automatic Transmission Fluid
When to Check and Change
A good time to check your automatic transmission fluid
level is when the engine oil is changed.
Change both the fluid and filter every
50,000 miles
(83
000 km) if the vehicle is mainly driven under one or
more of these conditions:
In heavy city traffic where the outside temperature
9 In hilly or mountainous terrain.
0 When doing frequent trailer towing.
regularly
reaches
90°F (32°C) or higher.
Uses such as found in taxi, police or delivery
If you do not use your vehicle under any of these
conditions, change the fluid and filter every
100,000 miles (1 66 000 km).
service.
How to Check
Because this operation can
be a little difficult, you may
choose
to have this done at the dealership service
department.
If you do it yourself, be sure to follow all the instructions
here, or you could get a false reading on the dipstick.
Notice: Too much or too little fluid can damage
your transmission.
Too much can mean that some
of the fluid could come out and fall on hot engine
part or exhaust system parts, starting
a fire.
Too little fluid could cause the transmission to
overheat.
Be sure to get an accurate reading if you
check your transmission fluid.
Wait at least 30 minutes before checking the
transmission fluid level
if you have been driving:
When outside temperatures are above
90°F (32°C).
At high speed for quite a while.
In heavy traffic-especially in hot weather
While pulling a trailer.
To get the right reading, the fluid should be at normal
operating temperature, which is 180°F
to 200°F
(82°C to 93°C).
5-20

Get the vehicle warmed up by driving about 15 miles
(24 km) when outside temperatures are above 50°F
(10OC). If it's colder than 50°F (IOOC), drive the vehicle
in
THIRD (3) until the engine temperature gage
moves and then remains steady for
10 minutes.
A cold fluid check can be made after the vehicle has
been sitting for eight hours or more with the engine
off,
but this is used only as a reference. Let the engine
run at idle for five minutes
if outside temperatures are
50°F (10°C) or more. If it's colder than 50°F (IOOC), you
may have to idle the engine longer. Should the fluid
level be low during this cold check, you
must check the
fluid hot before adding fluid. Checking the fluid hot
will give you a more accurate reading of the fluid level.
Checking the Fluid Level
Prepare your vehicle as follows:
0 Park your vehicle on a level place. Keep the engine
running.
With the parking brake applied, place the shift lever
in PARK (P).
With your foot on the brake pedal, move the shift
lever through each gear range, pausing for about
three seconds in each range. Then, position the shift
lever in PARK
(P).
Let the engine run at idle for three minutes or more. Then,
without shutting
off the engine, follow these steps:
-1 The automatic
transmission dipstick
handle with the
transmission and lock
symbol is located in the
engine compartment
I I on the passenger's side of
the vehicle.
See
Engine Compartment Overview on page 5-12 for
more information on location.
1. Flip the handle up and then pull out the dipstick
and wipe it with a clean rag or paper towel.
2. Push it back in all the way, wait three seconds and
then pull it back out again.
3. If the fluid level is in the acceptable range, push the
dipstick back
in all the way; then flip the handle
down to lock the dipstick in place.
5-21

If Steam Is Coming From Your Engine
Stean, ,;on, ,n c,,rheated engine L.. ,urn
you badly, even
if you just open the hood. Stay
away from the engine
if you see or hear steam
coming from
it. Just turn it off and get
CAUTION: (Continued)
U
everyone away from the vehicle until it cools
down. Wait until there is no
sign of steam or
coolant before you open the hood.
If you keep driving when your engine
is
overheated, the liquids in it can catch fire. You
or others could be badly burned. Stop your
engine if
it overheats, and get out of the
vehicle
until the engine is cool.
Notice: If your engine catches fire because you
keep driving with
no coolant, your vehicle can
be badly damaged. The costly repairs would not be
covered by your warranty.
If No Steam Is Coming From Your
Engine
If you get an engine overheat warning but see or hear
no steam, the problem may not be too serious.
Sometimes the engine can get a little too hot when
you:
0 Climb a long hill on a hot day
Stop after high-speed driving
Idle for long periods in traffic
9 Tow a trailer
5-25