towing GMC SIERRA 2007 User Guide

A parking brake symbol
is located next to the
N (NEUTRAL) symbol
as a reminder to set the
parking brake before
shifting the transfer case
in Neutral.
{CAUTION:
Shifting the transfer case to NEUTRAL
can cause your vehicle to roll even if the
transmission is in PARK (P). You or
someone else could be seriously injured.
Be sure to set the parking brake before
placing the transfer case in NEUTRAL.
SeeParking Brake on page 162.N (NEUTRAL):Shift to this setting only when
your vehicle needs to be towed. SeeRecreational
Vehicle Towing on page 439orTowing Your
Vehicle on page 439
2
m(Two-Wheel-Drive High):This setting is
used for driving in most street and highway
situations. The front axle is not engaged in
two-wheel drive. This setting also provides the
best fuel economy.
4
m(Four-Wheel-Drive High):Use this setting
when you need extra traction, such as on
snowy or icy roads or in most off-road situations.
This setting also engages the front axle to
help drive your vehicle. This is the best setting to
use when plowing snow.
You can shift from Two-Wheel-Drive High to
Four-Wheel-Drive High or Four-Wheel-Drive High
to Two-Wheel-Drive High while the vehicle is
moving. In extremely cold weather, it may
be necessary to stop or slow the vehicle to shift
into Four-Wheel-Drive High.
149

Electronic Transfer Case
The transfer case knob
is located next to the
steering column.
Use the dial to shift into and out of
four-wheel drive.
Recommended Transfer Case Settings
Driving ConditionsTransfer Case Settings
2m4m4nN
Normal YES
Severe YES
Extreme YES
Vehicle in Tow* YES
*SeeRecreational Vehicle Towing on page 439
Towing Your Vehicle on page 439
You can choose among four driving settings:
Indicator lights in the dial show which setting you
are in. The indicator lights will come on briey
when you turn on the ignition and one will stay on.
If the lights do not come on, you should take
your vehicle to your dealer for service. An indicator
light ashes while shifting the transfer case and
remains illuminated when the shift is complete. If
for some reason the transfer case cannot
make a requested shift, it will return to the last
chosen setting.
2
m(Two-Wheel-Drive High):This setting is
used for driving in most street and highway
situations. The front axle is not engaged in
Two-Wheel Drive. This setting also provides the
best fuel economy.
4
m(Four-Wheel-Drive High):Use the
Four-Wheel-Drive High position when extra traction
is needed, such as on snowy or icy roads or in
most off-road situations. This setting also engages
the front axle to help drive your vehicle. This is
the best setting to use when plowing snow.
152

4n(Four-Wheel-Drive Low):This setting also
engages the front axle and delivers extra
torque. You may never need this setting. It sends
maximum power to all four wheels. You might
choose Four-Wheel-Drive Low while driving
off-road in deep sand, deep mud, deep snow, and
while climbing or descending steep hills.
StabiliTrak
®will not engage in this mode.
{CAUTION:
Shifting the transfer case to NEUTRAL
can cause your vehicle to roll even if the
transmission is in PARK (P). You or
someone else could be seriously injured.
Be sure to set the parking brake before
placing the transfer case in NEUTRAL.
SeeParking Brake on page 162.
N (NEUTRAL):Shift the vehicle’s transfer case to
NEUTRAL only when towing your vehicle. See
Recreational Vehicle Towing on page 439or
Towing Your Vehicle on page 439for more
information.If the SERVICE 4–Wheel Drive message stays on,
you should take your vehicle to your dealer for
service. See “Service 4–Wheel Drive message”
underDIC Warnings and Messages on page 279.
Shifting Into Two-Wheel-Drive High
Turn the knob to the Two-Wheel-Drive High
position. This can be done at any speed, except
when shifting from Four-Wheel-Drive Low.
See Shifting Out of Four-Wheel-Drive Low for
more information.
Shifting Into Four-Wheel Drive Low
When Four-Wheel-Drive Low is engaged, vehicle
speed should be kept below 45 mph. Extended
high-speed operation in Four-Wheel-Drive Low may
damage or shorten the life of the drivetrain.
To shift to the Four-Wheel-Drive Low position, the
ignition must be in RUN and the vehicle must be
stopped or moving less than 3 mph (5 km/h) with
the transmission in NEUTRAL (N). The preferred
method for shifting into Four-Wheel-Drive Low
is to have your vehicle moving 1 to 2 mph
(1.6 to 3.2 km/h). Turn the knob to the
Four-Wheel-Drive Low position.
153

4n(Four-Wheel-Drive Low):This setting also
engages the front axle and delivers extra
torque. You may never need this setting. It sends
maximum power to all four wheels. You might
choose Four-Wheel-Drive Low if you are driving
off-road in deep sand, deep mud, deep snow, and
while climbing or descending steep hills.
StabiliTrak
®will not engage in this mode. See
StabiliTrak®System on page 381for more
information.
{CAUTION:
Shifting the transfer case to NEUTRAL
can cause your vehicle to roll even if the
transmission is in PARK (P). You or
someone else could be seriously injured.
Be sure to set the parking brake before
placing the transfer case in NEUTRAL.
SeeParking Brake on page 162.N (NEUTRAL):Shift the vehicle’s transfer case to
NEUTRAL only when towing your vehicle. See
Recreational Vehicle Towing on page 439or
Towing Your Vehicle on page 439for more
information.
If the SERVICE 4–Wheel Drive message stays on,
you should take your vehicle to your dealer for
service. See “Service 4–Wheel Drive message”
underDIC Warnings and Messages on page 279.
Shifting Into Four-Wheel-Drive High or
AUTO (Automatic Four-Wheel Drive)
Turn the knob to the Four-Wheel-Drive High or
AUTO position. This can be done at any speed,
except when shifting from Four-Wheel-Drive
Low, and the indicator light will ash while shifting.
It will remain on when the shift is completed.
158

Parking Brake
To set the parking brake, hold the regular brake
pedal down with your right foot. Push down
the parking brake pedal with your left foot.
A chime will activate and the warning light will
ash when the parking brake is applied and
the vehicle is moving at least 5 mph (8 km/h).To release the parking brake, hold the regular
brake pedal down. Pull the bottom edge of
the lever, located above the parking brake pedal,
with the parking brake symbol, to release the
parking brake.
If the ignition is on when the parking brake is
released, the brake system warning light will
go off.
Notice:Driving with the parking brake on can
overheat the brake system and cause
premature wear or damage to brake system
parts. Verify that the parking brake is fully
released and the brake warning light is
off before driving.
If you are towing a trailer and are parking on any
hill, seeTowing a Trailer on page 445.
162

Shifting Into Park (P)
{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 rmly 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 will not move, even
when you are on fairly level ground, use
the steps that follow. With four-wheel drive,
if your transfer case is in NEUTRAL, your
vehicle will be free to roll, even if your shift
CAUTION: (Continued)
CAUTION: (Continued)
lever is in PARK (P). So, be sure the
transfer case is in a drive gear — not in
NEUTRAL. If you are pulling a trailer, see
Towing a Trailer on page 445.
1. Hold the brake pedal down with your right foot
and set the parking brake.
2. Move the shift lever into the PARK (P)
position by pulling the shift lever toward
you and moving it up as far as it will go.
3. Be sure the transfer case is in a drive
gear — not in NEUTRAL (N).
4. Turn the ignition key to LOCK.
5. Remove the key and take it with you. If you
can leave your vehicle with the ignition key in
your hand, your vehicle is in PARK (P).
163

{CAUTION:
Four-wheel drive vehicles with the transfer
case in NEUTRAL will allow the vehicle to
roll, even if the shift lever is in PARK (P).
So, be sure the transfer case is in a drive
gear — not in NEUTRAL. Always set the
parking brake.
Follow the proper steps to be sure your vehicle
will not move. SeeShifting Into Park (P) on
page 163.
If you are pulling a trailer, seeTowing a Trailer
on page 445.
Mirrors
Manual Rearview Mirror
Pull or push the tab under the inside rearview
mirror to adjust it to the night or daytime setting. In
the nighttime setting, the glare from headlamps
behind the vehicle will be less intense.
Automatic Dimming Rearview Mirror
with OnStar
®, Compass and
Temperature Display
Your vehicle may have this feature. When on, the
automatic dimming mirror dims to the proper level
to minimize glare from lights behind you after dark.
The mirror has a dual display in the upper right
corner of the mirror face that shows the compass
reading and the outside temperature.
Control buttons for the OnStar
®system are at the
bottom of the mirror. SeeOnStar®System on
page 180for more information about the services
OnStar
®provides.
P(On/Off):This is the on/off button.
169

Outside Trailer-Tow Mirrors
If your vehicle has trailer towing type mirrors, they
can be adjusted so you can have a clear view
of the objects behind you. Manually pull out
the mirror head to extend it for better visibility
when towing a trailer.These mirrors can be manually folded forward or
rearward. The lower portion of the mirror is
convex. A convex mirror’s surface is curved so
you can see more from the driver’s seat. The
convex mirror can be adjusted manually to the
driver’s preferred position for better vision.
Your vehicle may have outside heated mirrors
which help clear them of condensation, snow, and
ice. When the rear window defogger button is
pressed, the heated mirrors are also turned on.
Only the upper glass of the mirror is heated.
The lower convex part of the mirror is not heated.
Your mirror may also have a turn signal arrow
that will ash in the direction of the turn or
lane change.
175

The main components of your instrument panel are the following:
A. Air Outlets. SeeOutlet Adjustment on
page 245.
B. Turn Signal/Multifunction Lever. SeeTurn
Signal/Multifunction Lever on page 212.
C. Driver Information Center (DIC) Buttons. See
Driver Information Center (DIC) on page 267.
D. Hazard Warning Flasher Button. SeeHazard
Warning Flashers on page 211.
E. Instrument Panel Cluster. SeeInstrument
Panel Cluster on page 247.
F. Shift Lever. SeeAutomatic Transmission
Operation on page 138. Tow/Haul Selector
Button (If Equipped). SeeTow/Haul Mode on
page 144. Range Selection Mode (Allison
Transmission
®and Hydra-Matic®6-Speed
Button (If Equipped). SeeAutomatic
Transmission Operation on page 138.
G. Audio System. SeeAudio System(s) on
page 300.
H. Instrument Panel Storage Area. SeeInstrument
Panel Storage Area on page 197.I. Integrated Trailer Brake Controller (If
Equipped). SeeTowing a Trailer on page 445.
J. Exterior Lamp Controls. SeeExterior Lamps
on page 221.
K. Hood Release. SeeHood Release on
page 497.
L. Parking Brake. SeeParking Brake on
page 162.
M. Dome Lamp Override Button. SeeDome Lamp
Override on page 226. Dome Lamp Knob.
SeeDome Lamps on page 226. Fog Lamp
Button (If Equipped). SeeFog Lamps on
page 224.
N. Cruise Control Buttons. SeeCruise Control on
page 218.
O. Tilt Wheel Lever. SeeTilt Wheel on page 212.
P. Horn. SeeHorn on page 211.
Q. Automatic Transfer Case Control (If Equipped).
SeeFour-Wheel Drive on page 147.
207

E. Shift Lever. SeeAutomatic Transmission
Operation on page 138.
F. Tow/Haul Selector Button (If Equipped). See
Tow/Haul Mode on page 144.
G. Driver Information Center (DIC) Controls. See
Driver Information Center (DIC) on page 267.
H. Audio System. SeeAudio System(s) on
page 300.
I. Exterior Lamps Control. SeeExterior Lamps on
page 221.
J. Integrated Trailer Brake Controller (If
Equipped). SeeTowing a Trailer on page 445.
K. Dome Lamp Override Button. SeeDome
Lamp Override on page 226. Dome Lamp
Knob. SeeDome Lamps on page 226.
L. Automatic Transfer Case Control. (If Equipped).
SeeFour-Wheel Drive on page 147.
M. Hood Release. SeeHood Release on
page 497.
N. Parking Brake. SeeParking Brake on
page 162.
O. Cruise Control Buttons. SeeCruise Control on
page 218.
P. Tilt Wheel Lever. SeeTilt Wheel on page 212.Q. Horn. SeeHorn on page 211.
R. Audio Steering Wheel Controls. SeeAudio
Steering Wheel Controls on page 368.
S. Climate Controls. SeeClimate Control System
(With Air Conditioning ) on page 234or
Climate Control System (Heater Only) on
page 237or Dual Automatic Climate Controls
(If Equipped). SeeDual Automatic Climate
Control System on page 238.
T. Accessory Power Outlets. SeeAccessory
Power Outlet(s) on page 232. Cigarette Lighter
(If Equipped). SeeAshtray(s) and Cigarette
Lighter on page 233.
U. StabiliTrak
®Button (If Equipped). See
StabiliTrak®System on page 381. Pedal Adjust
Button (If Equipped). SeeAdjustable Throttle
and Brake Pedal on page 136. Rear Park Assist
Disable Button (If Equipped). SeeUltrasonic
Rear Parking Assist (URPA) on page 228.
Heated Windshield Washer Fluid Button
(If Equipped). SeeWindshield Washer on
page 217.
V. Passenger Airbag Off Control (If Equipped).
SeeAirbag Off Switch on page 93.
W. Glove Box. SeeGlove Box on page 196.
210