4-31
NOTICE:
Pulling a trailer improperly can damage your
vehicle and result in costly repairs not covered by
your warranty. To pull a trailer correctly, follow
the advice in this part, and see your dealer for
important information about towing a trailer
with your vehicle. Additional rear axle
maintenance is required for a vehicle used to tow
a trailer. See ªScheduled Maintenance Servicesº
in the Index.
To identify what the vehicle trailering capacity is for
your vehicle, you should read the information in
ªWeight of the Trailerº that appears later in this section.
If yours was built with trailering options, as many are,
it's ready for heavier trailers. But trailering is different
than just driving your vehicle by itself. Trailering means
changes in handling, durability and fuel economy.
Successful, safe trailering takes correct equipment, and
it has to be used properly.
That's 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.
4-32 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'll be driving. A good source for this
information can be state or provincial police.
Consider using a sway control if your trailer will
weigh 4,000 lbs. (1 800 kg) or less. You should
always use a sway control if your trailer will weigh
more than 4,000 lbs. (1 800 kg). You can ask a hitch
dealer about sway controls.
Don't tow a trailer at all during the first 500 miles
(800 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, don't drive over 50 mph (80 km/h) and
don't make starts at full throttle. This helps your
engine and other parts of your vehicle wear in at the
heavier loads.You can tow in DRIVE (D). You may want to
shift the transmission to THIRD (3) or, if necessary,
a lower gear selection if the transmission shifts
too often (e.g., under heavy loads and/or
hilly conditions).
Three important considerations have to do with weight:
the weight of the trailer,
the weight of the trailer tongue
and the weight on your vehicle's tires.
Weight of the Trailer
How heavy can a trailer safely be?
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.
The following chart shows how much your trailer can
weigh, based upon vehicle model and options.
4-33
Model Engine Axle Ratio Max. Trailer Weight (lbs.) (kg) GCWR (lbs.) (kg)
G1500 (Cargo) 4.3L 3.42 4,600 (2088) 9,500 (4313)
5.0L 3.42 5,600 (2542) 10,500 (4767)
5.7L 3.42 6,100 (2769) 11,000 (4994)
G1500 (Passenger) 4.3L 3.42 4,200 (1907) 9,500 (4313)
3.73 4,700 (2134) 10,000 (4540)
5.0L 3.42 5,100 (2315) 10,500 (4767)
5.7L 3.42 5,600 (2542) 11,000 (4994)
3.73 6,600 (2996) 12,000 (5448)
G2500 (Cargo) 4.3L 3.42 4,300 (1952) 9,500 (4313)
4.10 5,000 (1816) 10,500 (4767)
5.0L 3.42 5,200 (2361) 10,500 (4767)
5.7L 3.42 5,700 (2588) 11,000 (4994)
3.73 6,400 (2906) 12,000 (5448)
4.10 7,900 (3587) 13,500 (6129)
6.5L 3.73 8,500 (3859) 14,500 (6583)
4.10 8,500 (3859) 14,500 (6583)
4-34
Model Engine Axle Ratio Max. Trailer Weight (lbs.) (kg) GCWR (lbs.) (kg)
G2500 (Passenger) 5.7L 3.73 5,800 (2633) 12,000 (5448)
4.10 7,300 (3314) 13,500 (6129)
6.5L 3.73 8,100 (3677) 14,500 (6583)
4.10 8,100 (3677) 14,500 (6583)
G3500 (Cargo) 5.7L 3.73 6,300 (2860) 12,000 (5448)
4.10 7,800 (3541) 13,500 (6129)
6.5L 3.73 8,400 (3814) 14,500 (6583)
4.10 8,400 (3814) 14,500 (6583)
8.1L 3.42 7,500 (3405) 13,500 (6129)
3.73 9,000 (4086) 15,000 (6810)
4.10 10,000 (4540) 17,000 (7718)
G3500 (Passenger) 5.7L 3.73 5,600 (2542) 12,000 (5448)
4.10 7,100 (3223) 13,500 (6129)
6.5L 3.73 7,800 (3541) 14,500 (6583)
4.10 7,800 (3541) 14,500 (6583)
8.1L 3.42 6,800 (3087) 13,500 (6129)
3.73 8,300 (3768) 15,000 (6810)
4.10 10,000 (4540) 17,000 (7718)
4-35
Maximum trailer weight is calculated assuming the
driver and one passenger are in the towing vehicle and
it has all the required trailering equipment. The weight
of additional equipment, passengers and cargo in the
towing vehicle must be subtracted from the above
maximum trailer weights.
You can ask your dealer for our trailering information or
advice, or you can write us at the address listed in your
Warranty and Owner Assistance Information Booklet.
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. And if you will tow a trailer, you
must add the tongue load to the GVW because your
vehicle will be carrying that weight, too. See ªLoading
Your Vehicleº in the Index for more information about
your vehicle's maximum load capacity.
If you're using a weight-carrying or a
weight
-distributing hitch, the trailer tongue weight (A)
should be 10 percent to 15 percent of the total loaded
trailer weight (B). Do not exceed the maximum
allowable tongue weight for your vehicle.
After you've loaded your trailer, weigh the trailer and
then the tongue, separately, to see if the weights are
proper. If they aren't, you may be able to get them right
simply by moving some items around in the trailer.
4-36 Total Weight on Your Vehicle's Tires
Be sure your vehicle's tires are inflated to the upper
limit for cold tires. You'll find these numbers on the
Certification label at the rear edge of the driver's door or
see ªLoading Your Vehicleº in the Index. Then be sure
you don't go over the GVW limit for your vehicle,
including the weight of the trailer tongue.
Hitches
It's important to have the correct hitch equipment.
Crosswinds, large trucks going by and rough roads are
a few reasons why you'll need the right hitch. Here are
some rules to follow:
The bumpers on your vehicle are not intended
for hitches. Do not attach rental hitches or other
bumper
-type hitches to them. Use only a
frame
-mounted hitch that does not attach to the
bumper. Do not use a ball hitch, because it could
pull the bumper loose.If you'll be pulling a trailer that, when loaded, will
weigh more than 4,000 lbs. (1 800 kg), be sure to
use a properly mounted, weight
-distributing hitch
and sway control of the proper size. This equipment
is very important for proper vehicle loading and
good handling when you're driving.
Will you have to make any holes in the body of your
vehicle when you install a trailer hitch?
If you're using the wiring provided by the
factory
-installed hitch, you should not need to make
any holes in the body of your vehicle. However, if
you have an aftermarket hitch installed, you may
need to make holes in the body.
If you do, then be sure to seal the holes later when
you remove the hitch. If you don't seal them, deadly
carbon monoxide (CO) from your exhaust can get
into your vehicle. See ªCarbon Monoxideº in the
Index. Dirt and water can, too.
4-38 Driving with a Trailer
CAUTION:
If you have a rear-most window open and you
pull a trailer with your vehicle, carbon monoxide
(CO) could come into your vehicle. You can't see
or smell CO. It can cause unconsciousness or
death. See ªEngine Exhaustº in the Index.
To maximize your safety when towing a trailer:
Have your exhaust system inspected for
leaks, and make necessary repairs before
starting on your trip.
Keep the rear
-most windows closed.
If exhaust does come into your vehicle
through a window in the rear or another
opening, drive with your front, main
heating or cooling system on and with the
fan on any speed. This will bring fresh,
outside air into your vehicle. Do not use
MAX A/C because it only recirculates the
air inside your vehicle. See ªComfort
Controlsº in the Index.
Towing a trailer requires a certain amount of experience.
Before setting out for the open road, you'll 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 the trailer hitch and platform
(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.
6-11
Before closing the hood, be sure all the filler caps are
on properly.
Then lift the hood to relieve pressure on the hood prop.
Remove the hood prop from the slot in the hood and
return the prop to its retainer. Then let the hood down
and close it firmly.
Noise Control System
The following information relates to compliance with
federal noise emission standards for vehicles with a
Gross Vehicle Weight Rating (GVWR) of more than
10,000 lbs. (4 536 kg). The Maintenance Schedule
provides information on maintaining the noise control
system to minimize degradation of the noise emission
control system during the life of your vehicle. The
noise control system warranty is given in your
warranty booklet.
These standards apply only to vehicles sold in the
United States.
Tampering With Noise Control
System Prohibited
Federal law prohibits the following acts or the
causing thereof:
1. The removal or rendering inoperative by any person,
other than for purposes of maintenance, repair or
replacement, of any device or element of design
incorporated into any new vehicle for the purpose of
noise control, prior to its sale or delivery to the
ultimate purchaser or while it is in use; or
2. The use of the vehicle after such device or element
of design has been removed or rendered inoperative
by any person.
Among those acts presumed to constitute tampering are
the acts listed below.
Insulation:
Removal of the noise shields or any
underhood insulation.