
What is the worst time for this? Wet ice. Very cold
snow or ice can be slick and hard to drive on. But wet
ice can be even more trouble because it may offer
the least traction of all. You can get wet ice when it is
about freezing (32°F; 0°C) and freezing rain begins
to fall. Try to avoid driving on wet ice until salt and
sand crews can get there.Whatever the condition — smooth ice, packed, blowing,
or loose snow — drive with caution.
Accelerate gently. Try not to break the fragile traction.
If you accelerate too fast, the drive wheels will spin and
polish the surface under the tires even more.
Your anti-lock brakes improve your vehicle’s stability
when you make a hard stop on a slippery road.
Even though you have an anti-lock braking system, you
will want to begin stopping sooner than you would on
dry pavement. SeeAnti-Lock Brake System (ABS)
on page 4-6.
Allow greater following distance on any
slippery road.
Watch for slippery spots. The road might be
ne until you hit a spot that is covered with ice. On
an otherwise clear road, ice patches may appear
in shaded areas where the sun cannot reach, such
as around clumps of trees, behind buildings, or
under bridges. Sometimes the surface of a curve or
an overpass may remain icy when the surrounding
roads are clear. If you see a patch of ice ahead
of you, brake before you are on it. Try not to brake
while you are actually on the ice, and avoid
sudden steering maneuvers.
4-39

Driving On Grades
Reduce speed and shift to a lower gearbeforeyou
start down a long or steep downgrade. If you don’t shift
down, you might have to use your brakes so much
that they would get hot and no longer work well.
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).
You may also want to activate the tow/haul mode if the
transmission shifts too often. See “Tow/Haul Mode”
earlier.
When towing at high altitude on steep uphill grades,
consider the following: Engine coolant will boil at a lower
temperature than at normal altitudes. If you turn your
engine off immediately after towing at high altitude
on steep uphill grades, your vehicle may show signs
similar to engine overheating. To avoid this, let the
engine run while parked (preferably on level ground)
with the automatic transmission in PARK (P) for a
few minutes before turning the engine off. If you do
get the overheat warning, seeEngine Overheating
on page 5-26.
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. Release the regular brakes.
4-59

*1— Gasoline Engine and Fuel Injection Rail #2.
*2— Gasoline Engine and Fuel Injection Rail #1.
*3— Gasoline Engine; Oxygen Sensors.
*4— Gasoline Engine; Oxygen Sensors.
*5— PCM Ignition
Fuses Usage
GLOW PLUG Not Used
CUST FEED Accessory Power
HYBRID Hybrid
STUD #1 Auxiliary Power
MBECMid Bussed Electrical Center
Power Feed, Front Seats,
Right Doors
BLOWER Front Climate Control Fan
LBECLeft Bussed Electrical
Center, Door Modules,
Door Locks, Auxiliary Power
Outlet — Rear Cargo Area
and Instrument Panel
STUD 2Accessory Power/Trailer
Wiring Brake Feed
Fuses Usage
ABS Anti-Lock Brakes
VSES/ECAS Vehicle Stability
IGN A Ignition Power
IGN B Ignition Power
LBEC 1Left Bussed Electrical Center,
Left Doors, Truck Body
Controller, Flasher Module
TRL PARK Parking Lamps Trailer Wiring
RR PARKRight Rear Parking and
Sidemarker Lamps
LR PARKLeft Rear Parking and
Sidemarker Lamps
PARK LP Parking Lamps Relay
STRTR Starter Relay
INTPARK Interior Lamps
STOP LP Stoplamps
TBC BATTTruck Body Controller
Battery Feed
S/ROOF Sunroof
5-111

A
Accessory Power Outlets.................................3-22
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-58
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment...........................5-105
Adjustable Throttle and Brake Pedal..................2-29
Air Cleaner/Filter, Engine.................................5-18
Air Conditioning..............................................3-23
Airbag
Passenger Status Indicator...........................3-33
Readiness Light..........................................3-32
Airbag Sensing and Diagnostic Module (SDM)....7-10
Airbag System................................................1-46
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-58
How Does an Airbag Restrain?......................1-52
Passenger Sensing System...........................1-54
Servicing Your Airbag-Equipped Vehicle..........1-58
What Makes an Airbag In ate?......................1-52
What Will You See After an Airbag In ates?....1-53
When Should an Airbag In ate?....................1-51
Where Are the Airbags?...............................1-48
All-Wheel Drive...............................................5-45
All-Wheel Drive (AWD) System.........................2-34
Analog Clock..................................................3-23
Antenna, Fixed Mast.......................................3-99
Antenna, XM™ Satellite Radio Antenna
System......................................................3-99Anti-Lock Brake System (ABS)........................... 4-6
Anti-Lock Brake, System Warning Light..............3-37
Appearance Care............................................5-95
Aluminum Wheels......................................5-101
Care of Safety Belts....................................5-99
Chemical Paint Spotting..............................5-102
Cleaning Exterior Lamps/Lenses..................5-100
Fabric/Carpet..............................................5-96
Finish Care...............................................5-100
Finish Damage..........................................5-102
Glass Surfaces............................................5-98
Instrument Panel.........................................5-98
Interior Plastic Components...........................5-98
Leather......................................................5-98
Sheet Metal Damage..................................5-102
Speaker Covers..........................................5-98
Tires........................................................5-102
Underbody Maintenance.............................5-102
Vehicle Care/Appearance Materials...............5-103
Vinyl..........................................................5-97
Washing Your Vehicle...................................5-99
Weatherstrips..............................................5-99
Windshield and Wiper Blades......................5-101
Wood Panels..............................................5-98
Ashtrays........................................................3-22
Audio System(s).............................................3-66
Audio Steering Wheel Controls......................3-96
Care of Your Cassette Tape Player................3-97
Care of Your CD and DVD Player..................3-99
Care of Your CD Player...............................3-98
1

Audio System(s) (cont.)
Care of Your CDs and DVDs........................3-98
CD Changer...............................................3-92
Chime Level Adjustment...............................3-99
Fixed Mast Antenna.....................................3-99
Navigation/Radio System..............................3-90
Radio with Cassette and CD.........................3-67
Rear Seat Audio (RSA)................................3-91
Setting the Time..........................................3-66
Theft-Deterrent Feature................................3-95
Understanding Radio Reception.....................3-97
XM™ Satellite Radio Antenna System............3-99
Automatic Headlamp System............................3-15
Automatic Transmission
Fluid..........................................................5-20
Operation...................................................2-31
B
Battery..........................................................5-40
Run-Down Protection...................................3-19
Before Leaving on a Long Trip.........................4-35
Brake
Anti-Lock Brake System (ABS)........................ 4-6
Emergencies................................................ 4-8
Parking......................................................2-34
System Warning Light..................................3-35
Brake Pedal, Throttle.......................................2-29
Brakes..........................................................5-37Braking........................................................... 4-5
Braking in Emergencies..................................... 4-8
Break-In, New Vehicle.....................................2-27
Bulb Replacement...........................................5-52
Front Turn Signal, Sidemarker and Daytime
Running Lamps........................................5-56
Halogen Bulbs............................................5-52
Headlamp Aiming........................................5-48
Headlamps.................................................5-53
High Intensity Discharge (HID) Lighting...........5-52
Replacement Bulbs......................................5-58
Taillamps....................................................5-57
Buying New Tires...........................................5-72
C
California Fuel.................................................. 5-6
Canadian Owners................................................ ii
Capacities and Speci cations..........................5-115
Carbon Monoxide...........2-13, 2-21, 2-37, 4-38, 4-51
Care of
Safety Belts................................................5-99
Your Cassette Tape Player............................3-97
Your CD and DVD Player.............................3-99
Your CD Player...........................................3-98
Your CDs and DVDs....................................3-98
Cargo Area, All-Weather..................................2-63
Cargo Cover Panels........................................2-52
CD Changer...................................................3-92
2