Pontiac Bonneville (2005 year). Manual

Tire and Loading Information Label

A vehicle specific Tire and Loading Information label is
attached to the vehicle’s center pillar (B-pillar). With
the driver’s door open, you will find the label attached
below the door lock post (striker). The tire and
loading information label shows the number of occupant
seating positions (A), and the maximum vehicle
capacity weight (B) in kilograms and pounds.

The Tire and Loading Information label also shows the
tire size of the original equipment tires (C) and the
recommended cold tire inflation pressures (D). For more
information on tires and inflation see Tires on page 5-74
and Inflation - Tire Pressure on page 5-80.

There is also important loading information on the
Certification label. It tells you the Gross Vehicle Weight
Rating (GVWR) and the Gross Axle Weight Rating
(GAWR) for the front and rear axle; see “Certification
Label” later in this section.

Steps for Determining Correct Load Limit

1. Locate the statement “The combined weight of

occupants and cargo should never exceed
XXX kg or XXX pounds” on your vehicle’s placard.

2. Determine the combined weight of the driver and

passengers that will be riding in your vehicle.

3. Subtract the combined weight of the driver and

passengers from XXX kilograms or XXX pounds.

4. The resulting figure equals the available amount of

cargo and luggage load capacity. For example, if
the “XXX” amount equals 1400 lbs and there will be
five 150 lb passengers in your vehicle, the amount
of available cargo and luggage load capacity is
650 lbs (1400

−

750 (5 x 150) = 650 lbs).

Label Example

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5. Determine the combined weight of luggage and

cargo being loaded on the vehicle. That weight
may not safely exceed the available cargo
and luggage load capacity calculated in Step 4.

6. If your vehicle will be towing a trailer, the load from

your trailer will be transferred to your vehicle.
Consult this manual to determine how this reduces
the available cargo and luggage load capacity of
your vehicle.

If your vehicle can tow a trailer, see Towing a
Trailer (V8 Engine) on page 4-36 or Towing a Trailer
(V6 Engine) on page 4-36 for important information
on towing a trailer, towing safety rules, and
trailering tips.

Item

Description

Total

Vehicle Capacity Weight
for Example 1 =

1,000 lbs (453 kg)

Subtract Occupant
Weight 150 lbs
(68 kg)

300 lbs (136 kg)

Available Occupant and
Cargo Weight =

700 lbs (317 kg)

Example 1

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Item

Description

Total

Vehicle Capacity Weight
for Example 2

1,000 lbs (453 kg)

Subtract Occupant
Weight 150 lbs
(68 kg)

750 lbs (340 kg)

Available Cargo
Weight

250 lbs (113 kg)

Item

Description

Total

Vehicle Capacity Weight
for Example 3

1,000 lbs (453 kg)

Subtract Occupant
Weight 200 lbs
(91 kg)

1,000 lbs (453 kg)

Available Cargo
Weight =

0 lbs (0 kg)

Refer to your vehicle’s Tire and Loading Information
label for specific information about your vehicle’s
capacity weight and seating positions. The combined
weight of the driver, passengers, and cargo should
never exceed your vehicle’s capacity weight.

Example 2

Example 3

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Certification Label

A vehicle specific Certification label is attached to the rear
edge of the driver’s door. It tells you the gross weight
capacity of your vehicle, called the Gross Vehicle Weight
Rating (GVWR). The GVWR includes the weight of the
vehicle, all occupants, fuel and cargo. Never exceed the
GVWR for your vehicle, or the Gross Axle Weight Rating
(GAWR) for either the front or rear axle.

And, if you do have a heavy load, you should spread it
out. Do not carry more than 176 lbs (80 kg) in your trunk.

{

CAUTION:

Do not load your vehicle any heavier than the
Gross Vehicle Weight Rating (GVWR), or either
the maximum front or rear Gross Axle Weight
Rating (GAWR). If you do, parts on your
vehicle can break, and it can change the way
your vehicle handles. These could cause you
to lose control and crash. Also, overloading
can shorten the life of your vehicle.

Notice: Overloading your vehicle may cause
damage. Repairs would not be covered by your
warranty. Do not overload your vehicle.

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If you put things inside your vehicle, like suitcases,
tools, packages, or anything else, they will go as fast as
the vehicle goes. If you have to stop or turn quickly,
or if there is a crash, they will keep going.

{

CAUTION:

Things you put inside your vehicle can strike
and injure people in a sudden stop or turn, or
in a crash.

•

Put things in the trunk of your vehicle. In a
trunk, put them as far forward as you can.
Try to spread the weight evenly.

•

Never stack heavier things, like suitcases,
inside the vehicle so that some of them
are above the tops of the seats.

•

Do not leave an unsecured child restraint
in your vehicle.

•

When you carry something inside the
vehicle, secure it whenever you can.

Automatic Level Control

This feature keeps the rear of your vehicle level as the
load changes. It is automatic, you do not need to adjust
anything.

Towing

Towing Your Vehicle

Consult your dealer or a professional towing service if
you need to have your disabled vehicle towed. See
Roadside Assistance Program on page 7-5.

If you want to tow your vehicle behind another vehicle
for recreational purposes (such as behind a motorhome),
see “Recreational Vehicle Towing” following.

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Recreational Vehicle Towing

Recreational vehicle towing means towing your vehicle
behind another vehicle — such as behind a motorhome.
The two most common types of recreational vehicle
towing are known as “dinghy towing” (towing your vehicle
with all four wheels on the ground) and “dolly towing”
(towing your vehicle with two wheels on the ground and
two wheels up on a device known as a “dolly”).

With the proper preparation and equipment, many
vehicles can be towed in these ways. See “Dinghy
Towing” and “Dolly Towing,” following.

Here are some important things to consider before you
do recreational vehicle towing:

•

What is the towing capacity of the towing vehicle?
Be sure you read the tow vehicle manufacturer’s
recommendations.

•

How far will you tow? Some vehicles have
restrictions on how far and how long they can tow.

•

Do you have the proper towing equipment? See
your dealer or trailering professional for additional
advice and equipment recommendations.

•

Is your vehicle ready to be towed? Just as you
would prepare your vehicle for a long trip, you
will want to make sure your vehicle is prepared to
be towed. See Before Leaving on a Long Trip
on page 4-21.

Dinghy Towing

Notice: If you tow your vehicle with all four wheels
on the ground, the drivetrain components could
be damaged. The repairs would not be covered by
your warranty. Do not tow your vehicle with all
four wheels on the ground.

Your vehicle was not designed to be towed with all four
wheels on the ground. If your vehicle must be towed,
you should use a dolly. See “Dolly Towing” that follows
for more information.

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Dolly Towing

Your vehicle can be towed using a dolly. To tow your
vehicle using a dolly, follow these steps:

1. Put the front wheels on the dolly.

2. Put the vehicle in PARK (P).

3. Set the parking brake and then remove the key.

4. Clamp the steering wheel in a straight-ahead

position.

5. Release the parking brake.

Towing a Trailer (V8 Engine)

Do not tow a trailer if your vehicle is equipped with the
4.6L V8 engine.

Towing a Trailer (V6 Engine)

{

CAUTION:

If you do not use the correct equipment and
drive properly, you can lose control when you
pull a trailer. For example, if the trailer is too
heavy, the brakes may not work well — or even
at all. You and your passengers could be
seriously injured. You may also damage your
vehicle; the resulting repairs would not be
covered by your warranty. Pull a trailer only if
you have followed all the steps in this section.
Ask your dealer for advice and information
about towing a trailer with your vehicle.

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Your vehicle can tow a trailer if it is equipped with the
3.8L V6 engine and the proper trailer towing equipment.
To identify what the vehicle trailering capacity is for
your vehicle, you should read the information in “Weight
of the Trailer” that appears later in this section. But
trailering is different than just driving your vehicle
by itself. Trailering means changes in handling,
acceleration, braking, durability and fuel economy.
Successful, safe trailering takes correct equipment, and
it has to be used properly.

That is the reason for this part. In it are many
time-tested, important trailering tips and safety rules.
Many of these are important for your safety and that of
your passengers. So please read this section carefully
before you pull a trailer.

Load-pulling components such as the engine, transaxle,
wheel assemblies and tires are forced to work harder
against the drag of the added weight. The engine
is required to operate at relatively higher speeds and
under greater loads, generating extra heat. Also,
the trailer adds considerably to wind resistance,
increasing the pulling requirements.

If You Do Decide To Pull A Trailer

If you do, here are some important points:

•

There are many different laws, including speed limit
restrictions, having to do with trailering. Make sure
your rig will be legal, not only where you live
but also where you will be driving. A good source
for this information can be state or provincial police.

•

Consider using a sway control. You can ask a hitch
dealer about sway controls.

•

Do not tow a trailer at all during the first 1,000 miles
(1 600 km) your new vehicle is driven. Your engine,
axle or other parts could be damaged.

•

Then, during the first 500 miles (800 km) that you
tow a trailer, do not drive over 50 mph (80 km/h)
and do not make starts at full throttle. This
helps your engine and other parts of your vehicle
wear in at the heavier loads.

•

Obey speed limit restrictions when towing a trailer.
Do not drive faster than the maximum posted
speed for trailers, or no more than 55 mph
(90 km/h), to save wear on your vehicle’s parts.

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Three important considerations have to do with weight:

•

The weight of the trailer

•

The weight of the trailer tongue

•

The total weight on your vehicle’s tires

Weight of the Trailer

How heavy can a trailer safely be?

It should never weigh more than 1,000 lbs (450 kg). But
even that can be too heavy.

It depends on how you plan to use your rig. For
example, speed, altitude, road grades, outside
temperature and how much your vehicle is used to pull
a trailer are all important. And, it can also depend
on any special equipment that you have on your vehicle.

You can ask your dealer for our trailering information or
advice, or you can write us at:

Pontiac-GMC Customer Assistance Center
P.O. Box 33172
Detroit, MI 48232-5172

In Canada, write to:

General Motors of Canada Limited
Customer Communication Centre, 163-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7

Weight of the Trailer Tongue

The tongue load (A) of any trailer is an important weight
to measure because it affects the total or gross weight of
your vehicle. The Gross Vehicle Weight (GVW) includes
the curb weight of the vehicle, any cargo you may carry in
it, and the people who will be riding in the vehicle. If you
have a lot of options, equipment, passengers, or cargo in
your vehicle, it will reduce the tongue weight your vehicle
can carry, which will also reduce the trailer weight your
vehicle can tow. And if you tow a trailer, you must add the
tongue load to the GVW because your vehicle will be
carrying that weight, too. See Loading Your Vehicle on
page 4-29 for more information about your vehicle’s
maximum load capacity.

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If you are using a weight-carrying hitch, the trailer
tongue (A) should weigh 10 to 15 percent of the total
loaded trailer weight (B).

After you have loaded your trailer, weigh the trailer and
then the tongue, separately, to see if the weights are
proper. If they are not, you may be able to get them right
simply by moving some items around in the trailer.

Total Weight on Your Vehicle’s Tires

Be sure your vehicle’s tires are inflated to the upper limit
for cold tires. You will find these numbers on the
Tire-Loading Information label. See Loading Your
Vehicle on page 4-29. Then be sure you do not go over
the GVW limit for your vehicle, including the weight
of the trailer tongue.

Hitches

It is important to have the correct hitch equipment.
Crosswinds, large trucks going by and rough roads are
a few reasons why you will need the right hitch. Here
are some rules to follow:

•

The rear bumper on your vehicle is not intended for
hitches. Do not attach rental hitches or other
bumper-type hitches to it. Use only a frame-mounted
hitch that does not attach to the bumper.

•

Will you have to make any holes in the body of your
vehicle when you install a trailer hitch? If you do, then
be sure to seal the holes later when you remove the
hitch. If you do not seal them, deadly carbon
monoxide (CO) from your exhaust can get into your
vehicle. See Engine Exhaust on page 2-34. Dirt and
water can also enter the vehicle.

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Safety Chains

You should always attach chains between your vehicle
and your trailer. Cross the safety chains under the
tongue of the trailer so that the tongue will not drop to
the road if it becomes separated from the hitch.
Instructions about safety chains may be provided by the
hitch manufacturer or by the trailer manufacturer.
Follow the manufacturer’s recommendation for attaching
safety chains and do not attach them to the bumper.
Always leave just enough slack so you can turn
with your rig. And, never allow safety chains to drag on
the ground.

Trailer Brakes

Does your trailer have its own brakes? Be sure to read
and follow the instructions for the trailer brakes so
you will be able to install, adjust and maintain them
properly.

Because you have anti-lock brakes, do not try to tap
into your vehicles brake system. If you do, both
brake systems will not work well, or at all.

Trailer Wiring Harness

All of the electrical circuits required for your trailer
lighting system can be accessed at the driver’s side rear
lamp connector. This connector is located under the
carpet in the rear corner of your trunk compartment.

Driving with a Trailer

Towing a trailer requires a certain amount of experience.
Before setting out for the open road, you will want to
get to know your rig. Acquaint yourself with the feel of
handling and braking with the added weight of the trailer.
And always keep in mind that the vehicle you are
driving is now a good deal longer and not nearly as
responsive as your vehicle is by itself.

Before you start, check all trailer hitch parts and
attachments, safety chains, electrical connector, lamps,
tires and mirror adjustment. If the trailer has electric
brakes, start your vehicle and trailer moving and then
apply the trailer brake controller by hand to be sure
the brakes are working. This lets you check your
electrical connection at the same time.

During your trip, check occasionally to be sure that the
load is secure, and that the lamps and any trailer
brakes are still working.

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Following Distance

Stay at least twice as far behind the vehicle ahead as
you would when driving your vehicle without a trailer.
This can help you avoid situations that require
heavy braking and sudden turns.

Passing

You will need more passing distance up ahead when
you are towing a trailer. And, because the vehicle
is a good deal longer, you will need to go much farther
beyond the passed vehicle before you can return to
your lane.

Backing Up

Hold the bottom of the steering wheel with one hand.
Then, to move the trailer to the left, just move that hand
to the left. To move the trailer to the right, move your
hand to the right. Always back up slowly and, if possible,
have someone guide you.

Making Turns

Notice: Making very sharp turns while trailering
could cause the trailer to come in contact with the
vehicle. Your vehicle could be damaged. Avoid
making very sharp turns while trailering.

When you are turning with a trailer, make wider turns than
normal. Do this so your trailer will not strike soft
shoulders, curbs, road signs, trees or other objects. Avoid
jerky or sudden maneuvers. Signal well in advance.

Turn Signals When Towing a Trailer

When you tow a trailer, your vehicle may need a
different turn signal flasher and/or extra wiring. Check
with your dealer. All of the electrical circuits required for
your trailer lighting system can be accessed at the
left rear lamp connector. This connector is located under
the carpet on the driver’s side in the rear corner of
your trunk compartment. The arrows on your instrument
panel will flash whenever you signal a turn or lane
change. Properly hooked up, the trailer lamps will also
flash, telling other drivers you are about to turn,
change lanes or stop.

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When towing a trailer, the arrows on your instrument
panel will flash for turns even if the bulbs on the trailer
are burned out. Thus, you may think drivers behind
you are seeing your signal when they are not. It
is important to check occasionally to be sure the trailer
bulbs are still working.

Your vehicle has bulb warning lights. When you plug a
trailer lighting system into your vehicle’s lighting
system, its bulb warning lights may not let you know if
one of your lamps goes out. So, when you have a trailer
lighting system plugged in, be sure to check your
vehicle and trailer lamps from time to time to be sure
they are all working. Once you disconnect the trailer
lamps, the bulb warning lights again can tell you if one
of your vehicle lamps is out.

Driving On Grades

Reduce speed and shift to a lower gear before you start
down a long or steep downgrade. If you do not shift
down, you might have to use your brakes so much that
they would get hot and no longer work well.

On a long uphill grade, shift down to THIRD (3) and
reduce your speed to around 45 mph (70 km/h) to
reduce the possibility of the engine and transaxle
overheating.

Parking on Hills

{

CAUTION:

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.

But if you ever have to park your rig on a hill, here is
how to do it:

1. Apply your regular brakes, but do not shift into

PARK (P) yet.

2. Have someone place chocks under the trailer

wheels.

3. When the wheel chocks are in place, release the

regular brakes until the chocks absorb the load.

4. Reapply the regular brakes. Then apply your

parking brake, and then shift to PARK (P).

5. Release the regular brakes.

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When You Are Ready to Leave After
Parking on a Hill

1. Apply your regular brakes and hold the pedal down

while you:

•

Start your engine.

•

Shift into a gear.

•

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 are
pulling a trailer. See the Maintenance Schedule for
more on this. Things that are especially important in
trailer operation are automatic transaxle fluid (do
not overfill), engine oil, drive 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
are trailering, it is a good idea to review this information
before you start your trip.

Check periodically to see that all hitch nuts and bolts
are tight.

Engine Cooling When Trailer Towing

Your cooling system may temporarily overheat during
severe operating conditions. See Engine Overheating
(3.8L V6 Engine) on page 5-36 or Engine Overheating
(4.6L V8 Engine) on page 5-38.

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Pontiac Bonneville (2005 year). Manual - part 16