2001 GMC SIERRA wheel

4-67
K-2500 Regular Cab Long Box HD (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,400 lbs. (4 717 kg)
8100 V8 3.73 13,700 lbs. (6 214 kg)**
4.10 15,700 lbs. (7 121 kg)**
6600 V8 Diesel 3.73 15,600 lbs. (7 076 kg)**
4.10 15,600 lbs. (7 076 kg)**K-2500 Extended Cab Long Box HD (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,200 lbs. (4 627 kg)
8100 V8 3.73 13,500 lbs. (6 123 kg)**
4.10 15,500 lbs. (7 031 kg)**
6600 V8 Diesel 3.73 15,500 lbs. (7 031 kg)**
4.10 15,500 lbs. (7 031 kg)**
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,200 lb. (544 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 2,500 lb. (1 134 kg) maximum.
** Fifth
-wheel hitch rating; weight distributing hitch rating is limited to 12,000 lbs. (5 443 kg) maximum.

4-68
K-2500 Crew Cab Short Box HD (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,000 lbs. (4 536 kg)
8100 V8 3.73 13,200 lbs. (5 987 kg)**
4.10 15,200 lbs. (6 895 kg)**
6600 V8 Diesel 3.73 15,200 lbs. (6 895 kg)**
4.10 15,200 lbs. (6 895 kg)**K-2500 Crew Cab Long Box HD (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 9,900 lbs. (4 491 kg)
8100 V8 3.73 13,200 lbs. (5 987 kg)**
4.10 15,200 lbs. (6 895 kg)**
6600 V8 Diesel 3.73 15,100 lbs. (6 849 kg)**
4.10 15,100 lbs. (6 849 kg)**
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,200 lb. (544 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 2,500 lb. (1 134 kg) maximum.
** Fifth
-wheel hitch rating; weight distributing hitch rating is limited to 12,000 lbs. (5 443 kg) maximum.

4-69
C-3500 Regular Cab HD (2WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,400 lbs. (4 717 kg)
8100 V8 4.10 15,700 lbs. (7 121 kg)**
6600 V8 Diesel 3.73 15,800 lbs. (7 167 kg)**
4.10 15,800 lbs. (7 167 kg)**
C
-3500 Extended Cab (2WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,100 lbs. (4 581 kg)
8100 V8 4.10 15,400 lbs. (6 985 kg)**
6600 V8 Diesel 3.73 15,500 lbs. (7 031 kg)**C
-3500 Crew Cab (2WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 9,900 lbs. (4 491 kg)
8100 V8 4.10 15,300 lbs. (6 940 kg)**
6600 V8 Diesel 3.73 15,400 lbs. (6 985 kg)**
4.10 15,400 lbs. (6 985 kg)**
K
-3500 Regular Cab (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 10,100 lbs. (4 582 kg)
8100 V8 4.10 15,500 lbs. (7 031 kg)**
6600 V8 Diesel 3.73 15,400 lbs. (6 985 kg)**
4.10 15,400 lbs. (6 985 kg)**
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,200 lb. (544 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 2,500 lb. (1 134 kg) maximum.
** Fifth
-wheel hitch rating; weight distributing hitch rating is limited to 12,000 lbs. (5 443 kg) maximum.

4-70
K-3500 Extended Cab (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 9,800 lbs. (4 445 kg)
8100 V8 4.10 15,100 lbs. (6 849 kg)**
6600 V8 Diesel 3.73 14,800 lbs. (6 713 kg)**
4.10 14,800 lbs. (6 713 kg)**K-3500 Crew Cab (4WD)*
Engine Axle
RatioMax. Trailer Wt.
6000 V8 4.10 9,800 lbs. (4 445 kg)
8100 V8 4.10 15,100 lbs. (6 849 kg)**
6600 V8 Diesel 3.73 15,200 lbs. (6 895 kg)**
4.10 15,200 lbs. (6 895 kg)**
* Weight
-distributing hitch tongue weight 10% to 15% of trailer weight 1,200 lb. (544 kg) maximum.
Fifth
-wheel hitch tongue weight 15% to 25% of trailer weight 2,500 lb. (1 134 kg) maximum.
** Fifth
-wheel hitch rating; weight distributing hitch rating is limited to 12,000 lbs. (5 443 kg) maximum.

4-74
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.
While towing a trailer or when exposed to long periods
of sunshine, the floor 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.

4-76 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 for an automatic transmission,
or into gear for a manual transmission.
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) for an
automatic transmission, or REVERSE (R) for a
manual transmission.5. If you have a four
-wheel-drive vehicle, be sure
the transfer case is in a drive gear and not in
NEUTRAL (N).
6. Release the regular brakes.
CAUTION:
It can be dangerous to get out of your vehicle if
the shift lever is not fully in PARK (P) with the
parking brake firmly set. Your vehicle can roll.
If you have left the engine running, the vehicle
can move suddenly. You or others could be
injured. To be sure your vehicle won't move,
even when you're on fairly level ground, use the
steps that follow.
Always put the shift lever fully in PARK (P) with
the parking brake firmly set.
If the transfer case on four-wheel drive vehicles
is in NEUTRAL, your vehicle will be free to roll,
even if your shift lever is in PARK (P). So, be
sure the transfer case is in a drive gear
-- not
in NEUTRAL.

4-79
The eight-wire harness contains the following
trailer circuits:

Yellow: Left Stop/Turn Signal

Dark Green: Right Stop/Turn Signal

Brown: Taillamps

White: Ground

Light Green: Back
-up Lamps

Light Blue: CHMSL

Red: Battery Feed

Dark Blue: Trailer Brake
A jumper harness for an electric trailer brake controller
and a trailer battery feed fuse are included with this
trailering package. (See ªInstrument Panel Jumper
Wiring Harnessº later in this section.)
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.Camper/Fifth
-Wheel Trailer Wiring Package
(If Equipped)
The eight
-wire camper harness is located under the
front edge of the pickup box on the driver's side of the
vehicle, attached to the frame bracket. A connector will
have to be added to the wiring harness which connects
to the camper.
The eight
-wire harness contains the following
camper/trailer circuits:

Yellow: Left Stop/Turn Signal

Dark Green: Right Stop/Turn Signal

Brown: Taillamps

White: Ground

Light Green: Back
-up Lamps

Light Blue: Center High
-Mounted
Stoplamp (CHMSL)

Red: Battery Feed

Dark Blue: Trailer Brake
A jumper harness for an electric trailer brake controller
and a trailer battery feed fuse are included with this
trailering package. (See ªInstrument Panel Jumper
Wiring Harnessº later in this section.)

4-80
If your vehicle is equipped with the ªHeavy-Duty
Traileringº option, please refer to ªHeavy
-Duty Trailer
Wiring Packageº, earlier in this section.
When the camper
-wiring harness is ordered without the
heavy
-duty trailering package, an eight-wire harness
with a seven
-pin connector and separate CHMSL
connector are located at the rear of the vehicle and are
tied to the vehicle's frame.Instrument Panel Jumper Wiring Harness
This harness is included with the heavy-duty and
camper/fifth
-wheel trailer wiring packages. The harness
is for an electric trailer brake controller and includes a
trailer battery feed fuse. This harness and fuse should be
installed by your dealer or a qualified service center.