Instrument Panel Overview........................ 140
Hazard Warning Flashers.......................... 142
Other Warning Devices............................. 142
Horn.......................................................... 142
Tilt Wheel.................................................. 142
Turn Signal/Multifunction Lever.................. 143
Turn and Lane-Change Signals................. 144
Headlamp High/Low-Beam Changer.......... 144
Windshield Wipers..................................... 145
Windshield Washer.................................... 146
Cruise Control........................................... 146
Exterior Lamps.......................................... 150
Headlamps on Reminder........................... 150
Daytime Running Lamps (DRL)................. 151
Marker Lamps........................................... 152
Instrument Panel Brightness...................... 152
Dome Lamps............................................. 153
Entry Lighting............................................ 154
Reading Lamps......................................... 154
Instrument Panel Switchbank..................... 154
Accessory Power Outlet(s)........................ 156
Ashtray(s) and Cigarette Lighter................ 157Climate Controls......................................... 157
Climate Control System............................. 157
Outlet Adjustment...................................... 160
Rear Heating System................................ 161
Warning Lights, Gages, and Indicators..... 161
Instrument Panel Cluster........................... 162
Speedometer and Odometer...................... 163
Trip Odometer........................................... 163
Tachometer............................................... 163
Engine Speed Limiter................................ 164
Safety Belt Reminder Light........................ 164
Safety Belt Reminder Tone....................... 164
Airbag Readiness Light............................. 165
Airbag Off Light......................................... 166
Charging System Light.............................. 167
Voltmeter Gage......................................... 168
Service Transmission Warning Light.......... 168
Range Inhibit Warning Indicator................. 169
Brake System Warning Light..................... 169
Anti-Lock Brake System Warning Light...... 172
Trailer Anti-Lock Brake System
Warning Light........................................ 172
Section 3 Instrument Panel
137
Speedometer and Odometer
Your speedometer lets you see your speed
in both miles per hour (mph) and kilometers per
hour (km/h).
Your odometer shows how far your vehicle
has been driven, in either miles (used in the
United States) or kilometers (used in Canada).
Trip Odometer
The trip odometer can tell you how far your
vehicle has been driven since you last set the trip
odometer to zero.
While the engine is running, press the reset
button, located to the right of the trip odometer, to
toggle between the trip odometer and the
regular odometer. Holding the reset button for
two seconds while the engine is running and the
trip odometer is displayed, will reset it.
To display the odometer reading with the ignition
off, press the reset button.
The hourmeter gage is accessed through the trip
odometer, for more information seeHourmeter
Gage on page 183.
Tachometer
This gage shows the safe operating range for the
engine speed in revolutions per minute (rpm).
7.2L Caterpillar®Diesel
Engine and Isuzu 6H
Diesel EnginesGasoline and
6.6L DURAMAX®
Diesel Engines
163
Air Pressure Gage
If your vehicle has air
brakes, the air pressure
gage is located above
the switchbank in
the center of the
instrument panel.
This gage shows the air pressure for both your
front and rear brake systems.
If the needle on the gage indicates that the air
pressure is below 60 to 75 psi (415 to 517 kPa),
the low air warning light will come on. An alarm will
also sound if this happens.The top pointer shows the pressure available for the
front system, while the bottom pointer shows
pressure for the rear. There should be no more than
4 psi (28 kPa) difference showing between the
systems.
Don’t drive until both pointers are showing at least
120 psi (827 kPa), so you’ll have enough air if
you need to apply your brakes.
Hourmeter Gage
To access the engine hourmeter gage, press the
trip odometer button three times.
The instrument panel cluster displays the
accumulated engine run time hours using the
reconfigurable odometer display. The engine run
time hours displays only when the ignition is in the
LOCK or ACCESSORY position and the trip
reset button is pressed for about four seconds.
The value of the accumulated hours does
not change when the battery is disconnected.
The hourmeter resets to 0.0 when 10,000 hours
are accumulated. The instrument panel cluster
begins to reaccumulate the engine run time hours
from 0.0 hours.
183
{CAUTION:
Without the correct wheel, you may not be
able to stop properly, and you could have
other problems like a tire air-out. You
could have a collision. If you do not go to
your dealer to get a new wheel, be sure
you get the correct one. Each new wheel
should match the original wheel in
load-carrying capacity, in ation pressure
capacity, diameter, width, offset and
mounting con guration.
Using wheels and tires with higher load-carrying
limits than the original wheels and tires does
not change the Gross Axle Weight Rating (GAWR)
or the Gross Vehicle Weight Rating (GVWR) of
your vehicle. SeeLoading Your Vehicle on
page 238for more information.Notice:The wrong wheel can cause trouble in
bearing life, brake cooling,
speedometer/odometer calibration, headlamp
aim, bumper height, vehicle ground clearance,
stopping distance and tire clearance to the
body and chassis. You could also have other
problems like a tire air-out.
Used Replacement Wheels
{CAUTION:
Putting a used wheel on your vehicle is
dangerous. You cannot know how it has
been used or how far it has been driven. It
could fail suddenly and cause a crash. If
you have to replace a wheel, use a new
GM original equipment wheel.
329
Part D: Maintenance Record
After the scheduled services are performed, record the date, odometer reading and who performed the
service, and any additional information from “Owner Checks and Services” on the following record pages.
Also, you should retain all maintenance receipts.
DateMiles/km Or
HoursServiced By Maintenance Record
400
Maintenance Schedule (cont.)
Introduction.............................................. 360
Maintenance Requirements...................... 360
Part A - Scheduled Maintenance
Services............................................... 362
Part B - Owner Checks and Services....... 391
Part C - Recommended Fluids and
Lubricants............................................. 397
Part D - Maintenance Record.................. 400
Scheduled Maintenance........................... 363
Scheduled Maintenance Supplements...... 363
Using....................................................... 362
Your Vehicle and the Environment............ 360
Malfunction Indicator Light........................... 174
Manual Transmission
Fluid........................................................ 283
Operation................................................. 116
Manual Windows........................................... 93
Marker Lamps............................................. 152
Mirrors
Manual Rearview Mirror........................... 133
Outside Convex Mirrors............................ 134
Outside Heated Mirrors............................ 134
Outside Manual Mirrors............................ 133
Outside Power Mirrors............................. 133N
New Vehicle Break-In.................................... 95
Noise Control System, Tampering ................ 314
Normal Maintenance Replacement Parts..... 352
O
Odometer.................................................... 163
Odometer, Trip............................................ 163
Off-Road Recovery...................................... 219
Oil
Change Engine Oil Light.......................... 176
Engine............................................268, 272
Low Oil Level Light.................................. 176
Pressure Gage......................................... 175
Oil, Engine Oil Life System........276, 278, 279
Older Children, Restraints............................. 42
Other Service Items
Air Conditioning System........................... 320
Automatic Ether Injection System............. 318
Front Wheel Bearings with
Oil-Filled Hubs...................................... 319
Fuel Filter................................................ 317
425
Tires (cont.)
Wheel Loading......................................... 323
Wheel Replacement................................. 328
When It Is Time for New Tires................. 324
Tow Hooks.................................................. 237
Towing
Your Vehicle............................................. 241
Traction
Control System (TCS).............................. 216
Trailer
Connections............................................. 243
Trailer Brake Hand Control Valve................ 214
Transmission
Fluid, Automatic....................................... 282
Fluid, Manual........................................... 283
Service Warning Light.............................. 168
Temperature Gage................................... 178
Transmission Operation, Automatic.............. 115
Transmission Operation, Manual.................. 116
Trip Odometer............................................. 163
Turn and Lane-Change Signals................... 144
Turn Signal/Multifunction Lever.................... 143
Two-Speed Rear Axle Electric Shift Control . 113U
Understanding Radio Reception................... 201
V
Vehicle
Control..................................................... 210
Damage Warnings....................................... 5
Loading.................................................... 238
Symbols...................................................... 5
Vehicle Data Collection and Event Data
Recorders................................................ 409
Vehicle Identification
Number (VIN).......................................... 340
Service Parts Identification Label.............. 340
Ventilation Adjustment.................................. 160
Visors........................................................... 95
Voltmeter Gage........................................... 168
429