wheel GMC SIERRA 2007 Owner's Manual

K-2500 Regular Cab
Long Box HD (4WD)*Axle Ratio Maximum Trailer Weight GCWR
6.0L V8 3.73 12,700 lbs (5 761 kg) 18,500 lbs (8 391 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs
(1 361 kg) maximum.
*Trailer rating limited to 13,000 lbs (5 897 kg) with weight distributing hitch.
K-2500 Extended Cab
Long Box HD (4WD)*Axle Ratio Maximum Trailer Weight GCWR
6.0L V8 3.73 12,200 lbs (5 534 kg) 18,500 lbs (8 391 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs
(1 361 kg) maximum.
*Trailer rating limited to 13,000 lbs (5 897 kg) with weight distributing hitch.
K-2500 Crew Cab Long
Box HD (4WD)*Axle Ratio Maximum Trailer Weight GCWR
6.0L V8 3.73 12,100 lbs (5 488 kg) 18,500 lbs (8 391 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,000 lbs
(1 361 kg) maximum.
*Trailer rating limited to 13,000 lbs (5 897 kg) with weight distributing hitch.
C-3500 Regular
Cab (2WD)*Axle Ratio Maximum Trailer Weight GCWR
6.0L V8 3.73 12,600 lbs (5 715 kg) 18,500 lbs (8 391 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,500 lbs
(1 587 kg) maximum.
*Trailer rating limited to 13,000 lbs (5 897 kg) with weight distributing hitch.
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C-3500 Extended
Cab (2WD)*Axle Ratio Maximum Trailer Weight GCWR
6.0L V8 3.73 12,200 lbs (5 534 kg) 18,500 lbs (8 391 kg)
6.0L V8 (Dual Rear
Wheels)3.73 12,000 lbs (5 443 kg) 18,500 lbs (8 391 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,500 lbs
(1 587 kg) maximum.
*Trailer rating limited to 13,000 lbs (5 897 kg) with weight distributing hitch.
C-3500 Crew
Cab (2WD)*Axle Ratio Maximum Trailer Weight GCWR
6.0L V8 3.73 12,100 lbs (5 488 kg) 18,500 lbs (8 391 kg)
6.0L V8 (Dual Rear
Wheels)3.73 11,800 lbs (5 352 kg) 18,500 lbs (8 391 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,500 lbs
(1 587 kg) maximum.
*Trailer rating limited to 13,000 lbs (5 897 kg) with weight distributing hitch.
K-3500 Regular
Cab (4WD)*Axle Ratio Maximum Trailer Weight GCWR
6.0L V8 3.73 12,400 lbs (5 624 kg) 18,500 lbs (8 391 kg)
6.0L V8 (Dual Rear
Wheels)3.73 12,200 lbs (5 534 kg) 18,500 lbs (8 391 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,500 lbs
(1 587 kg) maximum.
*Trailer rating limited to 13,000 lbs (5 897 kg) with weight distributing hitch.
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K-3500 Extended
Cab (4WD)* Axle RatioMaximum Trailer Weight GCWR
6.0L V8 3.73 12,000 lbs (5 443 kg) 18,500 lbs (8 391 kg)
6.0L V8 (Dual Rear
Wheels)3.73 11,700 lbs (5 307 kg) 18,500 lbs (8 391 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,500 lbs
(1 587 kg) maximum.
*Trailer rating limited to 13,000 lbs (5 897 kg) with weight distributing hitch.
K-3500 Crew
Cab (4WD)*Axle Ratio Maximum Trailer Weight GCWR
6.0L V8 3.73 11,800 lbs (5 352 kg) 18,500 lbs (8 391 kg)
6.0L V8 (Dual Rear
Wheels)3.73 11,600 lbs (5 262 kg) 18,500 lbs (8 391 kg)
*Fifth-wheel or gooseneck kingpin weight should be 15 percent to 25 percent of trailer weight up to 3,500 lbs
(1 587 kg) maximum.
*Trailer rating limited to 13,000 lbs (5 897 kg) with weight distributing hitch.
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The trailer tongue weight (A) should be 10 percent
to 15 percent of the total loaded trailer weight, up to
a maximum of 600 lbs (272 kg) for the 1500 or
2500 series, and up to a maximum of 750 lbs
(340 kg) for the 2500 HD or 3500 series with a
weight carrying hitch. The trailer tongue weight (A)
should be 10 percent to 15 percent of the total
loaded trailer weight, up to a maximum of 1,000 lbs
(453 kg) for the 1500 series and up to a maximum
of 1,500 lbs (680 kg) for the 2500, 2500 HD or
3500 series with a weight distributing hitch.Fifth wheel or gooseneck kingpin weight should be
15 to 25 percent of the trailer weight up to the
maximum amount specied in the trailering chart
for your vehicle. See “Weight of the Trailer”,
and “Fifth-Wheel and Gooseneck Trailering” in this
section.
Do not exceed the maximum allowable tongue
weight for your vehicle. Choose the shortest hitch
extension that will position the hitch ball closest
to the vehicle. This will help reduce the effect
of trailer tongue weight on the rear axle.
After you have loaded the 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 by moving some items
around in the trailer.
Trailering may be limited by the vehicle’s ability to
carry tongue weight. Tongue weight cannot
cause the vehicle to exceed the GVWR (Gross
Vehicle Weight Rating) or the RGAWR (Rear
Gross Axle Weight Rating). The effect of additional
weight may reduce your trailering capacity more
than the total of the additional weight.
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Weight-Distributing Hitches and Weight
Carrying Hitches
A. Body to Ground Distance
B. Front of Vehiclet
When using a weight-distributing hitch, the hitch
must be adjusted so the distance (A) remains
the same both before and after coupling the trailer
to the tow vehicle.If you use a step-bumper hitch, the bumper could
be damaged in sharp turns. Make sure there is
ample room when turning to avoid contact between
the trailer and the bumper.
If you will be pulling a trailer that, when loaded,
will weigh more than 5,000 lbs (2 270 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 driving. Always
use a sway control if the trailer will weigh
more than these limits. You can ask a hitch dealer
about sway controls.
Fifth Wheel and Gooseneck Trailering
Fifth wheel and gooseneck trailers can be
used with many pickup models. These trailers
place a larger percentage of the weight (kingpin
weight) on the tow vehicle than conventional
trailers. Make sure this weight does not cause the
vehicle to exceed GAWR or GVWR.
Fifth wheel or gooseneck kingpin weight should be
15 to 25 percent of the trailer weight up to the
maximum amount specied in the trailering chart
for your vehicle. See “Weight of the Trailer” in
this section for more information.
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The hitch should be located in the pickup bed so
that it’s centerline is over or slightly in front of the
rear axle. Take care that it is not so far forward that
it will contact the back of the cab in sharp turns.
This is especially important for short box pickups.
Trailer pin box extensions and sliding fth wheel
hitch assemblies can help this condition. There
should be at least six inches of clearance between
the top of the pickup box and the bottom of the
trailer shelf that extends over the box.
Make sure the hitch is attached to the tow vehicle
frame rails. Do not use the pickup box for support.
Safety Chains
You should always attach chains between your
vehicle and your trailer. Cross the safety chains
under the tongue of the trailer to help prevent the
tongue from contacting 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. If you are towing a
trailer up to 5,000 lbs (2 271 kg) with a
factory-installed step bumper, you may attach the
safety chains to the attaching points on the bumper.If you are towing a trailer up to your vehicle’s trailer
rating limit you may attach the safety chains to the
attaching point on the hitch platform. If you are
towing with an aftermarket hitch follow the trailer or
hitch manufacturer’s recommendation for attaching
safety chains. Always leave just enough slack so
you can turn with your rig. Never allow safety
chains to drag on the ground.
Trailer Brakes
If your trailer weighs more than 2,000 lbs (900 kg)
loaded, then it needs its own brakes – and they
must be adequate. Be sure to read and follow the
instructions for the trailer brakes so you’ll be
able to install, adjust and maintain them properly.
If your vehicle is equipped with StabiliTrak
®,
your trailer cannot tap into the vehicle’s hydraulic
brake system.
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Your trailer brake system can tap into the vehicle’s
hydraulic brake system only if:
The trailer parts can withstand 3,000 psi
(20 650 kPa) of pressure.
The trailer’s brake system will use less than
0.02 cubic inch (0.3 cc) of uid from your
vehicle’s master cylinder. Otherwise,
both braking systems won’t work well. You
could even lose your brakes.
If everything checks out this far, make the brake
tap at the port on the master cylinder that
sends the uid to the rear brakes. But don’t use
copper tubing for this. If you do, it will bend
and nally break off. Use steel brake tubing.
Integrated Trailer Brake Control System
Your vehicle may have
an Integrated Trailer
Brake Control (ITBC)
system for electric trailer
brakes.This symbol is located on the Trailer Brake
Control Panel on vehicles with an Integrated
Trailer Brake Control System. The power output to
the trailer brakes is based on the amount of
brake pressure being applied by your vehicle’s
brake system. This available power output to the
trailer brakes can be adjusted to a wide range
of trailering situations.
The ITBC system is integrated with your vehicle’s
brake, anti-lock brake and StabiliTrak
®(if
equipped) systems. In trailering conditions that
cause your vehicle’s anti-lock brake or StabiliTrak
®
systems to activate, power sent to the trailer’s
brakes will be automatically adjusted to minimize
trailer wheel lock-up. This does not imply that
your trailer has the StabiliTrak
®system.
If your vehicle’s brake, anti-lock brake or
StabiliTrak
®systems are not functioning properly,
your ITBC system may not be fully functional
or may not function at all. Make sure all of these
systems are fully operational to ensure full
functionality of the ITBC system.
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4. Adjust the Trailer Gain by using the gain
adjustment (+ / -) buttons on the Trailer
Brake Control Panel.
5. Drive the vehicle with the trailer attached on a
level road surface representative of the towing
condition and free of traffic at about 20 to
25 mph (32 to 40 km/h) and fully apply
the Manual Trailer Brake Apply lever.
Adjusting trailer gain at speeds lower than
20 to 25 mph (32 to 40 km/h) may result in an
incorrect gain setting.
6. Adjust the Trailer Gain to just below the point
of trailer wheel lock-up, indicated by trailer
wheel squeal or puffs of tire smoke when
a trailer wheel locks.
Trailer wheel lock-up may not occur if towing
a heavily loaded trailer. In this case, adjust
the Trailer Gain to the highest allowable
setting for the towing condition.
7. Re-adjust Trailer Gain any time vehicle
loading, trailer loading or road surface
conditions change or if you notice trailer wheel
lock-up at any time while you are towingOther ITBC Related DIC Messages
In addition to displaying TRAILER GAIN and
TRAILER OUTPUT through the DIC, trailer
connection and ITBC system status is displayed in
the DIC.
TRAILER CONNECTED – This message will be
briey displayed when a trailer with electric brakes
is rst connected to the vehicle. This message
will automatically turn off in about ten seconds.
The driver can also acknowledge this message
before it automatically turns off.
CHECK TRAILER WIRING – This message will be
displayed if:
1. The ITBC system rst determines connection
to a trailer with electric brakes and then the
trailer harness becomes disconnected
from the vehicle.
If the disconnect occurs while the vehicle is
stationary, this message will automatically turn
off in about thirty seconds. This message
will also turn off if the driver acknowledges this
message off or if the trailer harness is
re-connected.
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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.
While towing a trailer or when exposed to long
periods of sunshine, the oor of the truck bed may
become very warm. Avoid putting items in the
truck bed that might be affected by high ambient
temperatures.
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’ll need more passing distance up ahead when
you’re towing a trailer. And, because you’re a good
deal longer, you’ll 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’re turning with a trailer, make wider
turns than normal. Do this so your trailer
won’t strike soft shoulders, curbs, road signs,
trees or other objects. Avoid jerky or sudden
maneuvers. Signal well in advance.
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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’s how to do it:
1. Apply your regular brakes, but don’t 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 shift into PARK (P).
5. If you have a four-wheel-drive vehicle, be sure
the transfer case is in a drive gear and not in
NEUTRAL.
6. Release the regular brakes.
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