Page 342 of 594

Driving Through Deep Standing Water
Notice:If you drive too quickly through deep
puddles or standing water, water can come in
through your engine’s air intake and badly damage
your engine. Never drive through water that is
slightly lower than the underbody of your vehicle.
If you cannot avoid deep puddles or standing water,
drive through them very slowly.
Driving Through Flowing Water
{CAUTION:
Flowing or rushing water creates strong
forces. If you try to drive through owing
water, as you might at a low water crossing,
your vehicle can be carried away. As little as
six inches of owing water can carry away a
smaller vehicle. If this happens, you and other
vehicle occupants could drown. Do not ignore
police warning signs, and otherwise be very
cautious about trying to drive through
owing water.
Some Other Rainy Weather Tips
Turn on your low-beam headlamps — not just your
parking lamps — to help make you more visible to
others.
Besides slowing down, allow some extra following
distance. And be especially careful when you
pass another vehicle. Allow yourself more clear
room ahead, and be prepared to have your
view restricted by road spray.
Have good tires with proper tread depth. SeeTires
on page 5-74.
4-36
Page 467 of 594
3. Pull the headlamp assembly out.
A. Low-Beam Headlamp
B. High-Beam Headlamp4. Unplug the electrical connector.
5. Turn the old bulb counterclockwise and remove it
from the headlamp assembly.
6. Put the new bulb into the assembly and turn it
clockwise until it is tight.
7. Plug in the electrical connector.
8. Reinstall the headlamp assembly.
9. Install the pin and turn it into the locking feature.
5-63
Page 476 of 594
Replacement Bulbs
Exterior Lamp Bulb Number
Back-up Lamp 3157
Back-up Lamp* 1156
Cargo Lamp and Center
High-Mounted Stoplamp (CHMSL)912
Daytime Running Lamps (DRL) 4114K
Fender Marker, Front Roof
Marker and Sidemarker Lamp
(If Equipped)194
Front Parking and Turn Lamp 3457A
License Plate Lamp 168
Exterior Lamp Bulb Number
Headlamps
High-Beam 9005
Low-Beam 9006
Rear Marker Lamp,
Taillamp and Stoplamp*3157
Rear Turn Signal Lamp 3157
Rear Turn Signal Lamp* 1156
Stoplamp and Taillamp* 1157
* Chassis Cab Models
For replacement bulbs not listed here, contact your
dealer.
5-72
Page 536 of 594

Fuses Usage
SEO B2 Off-Road Lamps
4WS Not Used
AUX PWRAuxiliary Power
Outlet — Console
PCM 1 Powertrain Control Module
ETC/ECMElectronic Throttle Control,
Electronic Brake
Controller-Gasoline Engine,
Fan Clutch-Diesel Engines
IGN EInstrument Panel Cluster, Air
Conditioning Relay, Turn
Signal/Hazard Switch,
Starter Relay
RTD Ride Control
TRL B/U Backup Lamps Trailer Wiring
F/PMP Fuel Pump (Relay)
B/U LPBack-up Lamps, Automatic
Transmission Shift Lock
Control System
RR DEFOG Rear Window Defogger
HDLP-HI Headlamp High Beam Relay
PRIME Not Used
AIRBAGSupplemental In atable
Restraint System
FRT PARKFront Parking Lamps,
Sidemarker LampsFuses Usage
DRLDaytime Running
Lamps (Relay)
SEO IGN Rear Defog Relay
TBC IGN1 Truck Body Controller Ignition
HI HDLP-LT High Beam Headlamp-Left
LH HID Not Used
DRL Daytime Running Lamps
RVC Regulated Voltage Control
IPC/DICInstrument Panel
Cluster/Driver Information
Center
HVAC/ECAS Climate Control Controller
CIG LTR Cigarette Lighter
HI HDLP-RT High Beam Headlamp-Right
HDLP-LOW Headlamp Low Beam Relay
A/C COMPAir Conditioning
Compressor Relay
A/C COMP Air Conditioning Compressor
TCMB Transmission Control Module
RR WPR Not Used
RADIO Audio System
SEO B1Mid Bussed Electrical Center,
Rear Heated Seats,
Universal Home Remote
System
5-132
Page 537 of 594
Fuses Usage
LO HDLP-LT Headlamp Low Beam-Left
BTSIBrake Transmission Shift
Interlock System
CRNK Starting System
LO HDLP-RT Headlamp Low Beam-Right
FOG LP Fog Lamps Relay
FOG LP Fog Lamps
HORN Horn Relay
W/S WASHWindshield Washer
Pump Relay
W/S WASH Windshield Washer Pump
INFOOnStar
®/Rear Seat
Entertainment
RADIO AMP Radio Ampli er
RH HID Not Used
HORN Horn
EAP Not Used
TREC Not Used
SBA Supplemental Brake Assist
Auxiliary Electric Cooling Fan
Fuse Block
The auxiliary electric
cooling fan fuse block is
located in the engine
compartment on the
driver’s side of the vehicle
next to the underhood
fuse block.
Lift the cover for access to the fuse/relay block.
Fuses Usage
COOL/FAN Cooling Fan
COOL/FAN Cooling Fan Relay Fuse
COOL/FAN Cooling Fan Fuse
Relays Usage
COOL/FAN 1 Cooling Fan Relay 1
COOL/FAN 3 Cooling Fan Relay 3
COOL/FAN 2 Cooling Fan Relay 2
5-133
Page 585 of 594

H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-9
Headlamps............................................3-13, 5-62
Automatic Headlamp System.........................3-14
Bulb Replacement.......................................5-62
Daytime Running Lamps...............................3-14
Flash-to-Pass............................................... 3-8
Front Turn Signal, Sidemarker
and Daytime Running Lamps.....................5-64
Halogen Bulbs............................................5-62
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-14
Pickup Box Identi cation and
Fender Marker Lamps...............................5-69
Roof Marker Lamps.....................................5-66
Heated Seats................................................... 1-5
Heater...................................................3-20, 3-21
Heater...........................................................3-24
Highbeam On Light.........................................3-49
Highway Hypnosis...........................................4-40
Hill and Mountain Roads..................................4-40
Hood
Checking Things Under................................5-12
Release.....................................................5-13
Horn ............................................................... 3-6
How to Use This Manual...................................... ii
How to Wear Safety Belts Properly...................1-18
Hydraulic Clutch.............................................5-34
I
Ignition Positions.............................................2-20
Infants and Young Children, Restraints...............1-34
In ation - Tire Pressure...................................5-81
Instrument Panel
Overview..................................................... 3-4
Instrument Panel (I/P)
Brightness..................................................3-17
Cluster.......................................................3-31
J
Jump Starting.................................................5-52
K
Keyless Entry System....................................... 2-4
Keys............................................................... 2-3
7
Page 586 of 594

L
Labeling, Tire Sidewall.....................................5-75
Lamps
Auxiliary Roof Mounted Lamp........................3-16
Cargo........................................................3-18
Dome ........................................................3-17
Dome Lamp Override...................................3-17
Fog ...........................................................3-16
Front Reading.............................................3-18
LATCH System
Child Restraints...........................................1-44
Latches, Seatback............................................ 1-9
License Plate Lamps.......................................5-71
Light
Airbag Off..................................................3-34
Airbag Readiness........................................3-33
Anti-Lock Brake System Warning...................3-42
Battery Warning..........................................3-39
Brake System Warning.................................3-41
Cargo Lamp...............................................3-49
Cruise Control.............................................3-48
Four-Wheel-Drive.........................................3-49
Highbeam On.............................................3-49
Low Fuel Warning.......................................3-50Light (cont.)
Malfunction Indicator....................................3-45
Passenger Airbag Status Indicator..................3-36
Safety Belt Reminder...................................3-33
Security.....................................................3-48
Tow/Haul Mode ...........................................3-49
Traction Off................................................3-42
Up-Shift.....................................................3-40
Lighting
Entry.........................................................3-18
Exit...........................................................3-18
Loading Your Vehicle.......................................4-48
Locking Rear Axle...........................................4-12
Locks
Delayed Locking........................................... 2-9
Door ........................................................... 2-8
Lockout Protection.......................................2-12
Power Door.................................................. 2-8
Programmable Automatic Door Locks.............2-10
Rear Door Security Locks.............................2-12
Loss of Control...............................................4-16
Low Fuel Warning Light...................................3-50
Lumbar
Power Controls............................................. 1-4
8