❑Evaporative Control System service, if equipped, (or
every 24 months, whichever occurs first).(2) (24) †
❑Gasoline Engine: Air compressor remote mounted air
filter dry element pleated paper air strainer service
(or every 6 months or every 1800 hours, whichever
occurs first).
96,000 Miles (152 000 km)
❑Lubricate U-joints (or every 6 months, whichever
occurs first).
97,500 Miles (156 000 km)
❑Gasoline Engine Only: Check engine oil life system.
If engine oil and filter are changed, reset system.
See “Engine Oil (Gasoline Engine)” in the
Index.(2) (8)
❑Check fluid levels (or every 3 months, whichever
occurs first).(1) (5)
❑Chassis lubrication service (or every 6 months,
whichever occurs first).(11)
❑Wheels and tires service.(14)
❑Hydraulic brake service (or every 6 months,
whichever occurs first).(6) (36)
❑Parking brake service (or every 6 months, whichever
occurs first).(21)
❑Air brake service (or every 6 months, whichever
occurs first).(32)❑Air brake automatic slack adjuster service (or every
500 hours, whichever occurs first).(33)
❑Check air brake relay valve operation and check for
leaks (or every month, or every 300 hours, whichever
occurs first).
❑Clean air brake application valve (or every 3 months,
or every 300 hours, whichever occurs first). Lubricate
linkage.
❑Air brake chamber service (or every 2 months,
whichever occurs first).(34)
100,000 Miles (160 000 km)
❑Diesel Only: Inspect engine drive belt; replace as
necessary.
❑Gasoline Engine Only (Vehicles with GVW of
16,000 lbs or less): Spark plug service.(2) (25)
❑Change power steering fluid (or every 36 months,
whichever occurs first).(12)
❑Replace power steering reservoir filter element
(or every 24 months, whichever occurs first).
❑Wheel bearing (oil type) service (and whenever hubs
are removed).(22) (36)
❑Except four-wheel drive: Front axle service.(31)
❑Four-wheel drive only: Front axle service.(30)
❑Four-wheel drive only: Transfer case service.(30)
6-18
(12)= Check steering system:
•Look for damaged, loose, or missing parts. Inspect
the steering linkage relay rod and tie rod ends for
looseness or lack of lubricant. Also look for parts
showing signs of wear or lack of lubrication. Replace
parts as needed. Also check steering gear mounting
bolts, pitman arm nut, gear housing upper cover and
side cover attaching bolts, steering column mounting
bolts and cardan joint clamp bolts; tighten if
necessary. See the service manual.
•Inspect power steering hoses, tubes, and fittings for
leaks. Hoses and lines must not be twisted, kinked,
or tightly bent. Make sure clips, clamps, supporting
tubes, and hoses are in place and properly secured.
•Check steering gear for leakage around pitman shaft
and housing. If leakage is evident (lubricant oozing
out, not just oily film), leak should be corrected
immediately.
(13)= Check front and rear suspension. Look for
damaged, loose, or missing parts or parts showing signs
of wear or lack of lubrication. Replace parts as needed.
(14)= Adjust tire pressures as indicated on the
Certification or Tire Information label for optimum tire
life. SeeTires on page 5-82for further details. Check
tires for excessive or abnormal wear or damage. Also
check for damaged wheels. Replace wheels and/or tires
as needed.(15)= Check spring-to-axle U-bolts and shackle bolts
for proper torque. See the service manual for torque
sequence and specifications. When parts are replaced,
the torque must be checked and adjusted more often
during the first 6,000 miles (10 000 km). Check torque at
500 miles (800 km) and 2,000 miles (3 000 km) after
first use of parts.
(16)= Check complete exhaust system, including DPF
pressure lines, and cab areas near the exhaust system
for broken, damaged, missing, or out-of-position parts.
Also inspect for open seams, holes, loose connections, or
other conditions which could let exhaust fumes seep into
the driver compartment. Needed repairs should be made
at once. To help maintain system integrity, replace
exhaust pipes whenever a new muffler is put on.
(17)= Check all gasoline engine drive belts for cracks,
fraying, and wear. Replace as needed.
(18)= Adjust valve lash. Incorrect valve clearance will
result in increased engine noise and reduced engine
output.
(19)= With the engine off and below normal operating
temperature, check to see that the thermostatically
controlled engine cooling fan can be rotated by hand on
viscous-operated drives. Replace as needed.
(20)= Check shields and underhood insulation for
damage or looseness. Adjust or replace as needed.
6-22
Part B: Owner Checks and Services
Listed in this part are owner checks and services
which should be performed at the intervals specified to
help ensure the safety, dependability and emission
control performance of your vehicle.
For your safety and that of others, any of the
safety-related components that may have been
damaged in an accident should be checked and any
needed repairs made before operating the vehicle.
At the minimum, these routine checks should be made
every 6 months or 6,000 miles (10 000 km), whichever
occurs first. Whenever repairs are needed, have
them completed before operating the vehicle.
At Each Fuel Fill
It is important to perform these underhood checks at
each fuel fill.
Engine Oil Level Check
Notice:It is important to check the engine oil
regularly and keep it at the proper level. Failure to
keep the engine oil at the proper level can cause
damage to the engine not covered by your warranty.Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil (Caterpillar
®Diesel Engine)
on page 5-23orEngine Oil (Gasoline Engine) on
page 5-24orEngine Oil (DURAMAX
®Diesel Engine) on
page 5-28orEngine Oil (Isuzu Diesel Engine) on
page 5-32.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
(Caterpillar®Diesel Engines) on page 5-44orEngine
Coolant (Gas and DURAMAX®/Isuzu 7.8L L6 Engines)
on page 5-44.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the windshield
washer fluid reservoir and add the proper fluid if
necessary. SeeWindshield Washer Fluid on page 5-55.
Tire In ation Check
Check tire inflation cold. Make sure the tires are inflated
to the correct pressures. SeeLoading Your Vehicle
on page 4-21andInflation - Tire Pressure on page 5-82.
6-26
A
Accessories and Modifications............................ 5-4
Adding a Snow Plow or Similar Equipment.........4-23
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-59
Additives, Fuel................................................. 5-8
Add-On Electrical Equipment...........................5-102
Air Cleaner/Filter, Engine.................................5-39
Air Conditioning..............................................3-20
Air Pressure Gage..........................................3-46
Air Suspension...............................................2-44
Air Suspension Seats........................................ 1-6
Airbag
Off Light.....................................................3-29
Readiness Light..........................................3-28
Airbag System................................................1-48
What Will You See After an Airbag Inflates?....1-54
When Should an Airbag Inflate?....................1-52
Where Are the Airbags?...............................1-51
Airbag Systems
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-59
Airbag Off Switch........................................1-56
How Does an Airbag Restrain?......................1-54
Servicing Your Airbag-Equipped Vehicle..........1-59
What Makes an Airbag Inflate?......................1-53
Antenna, Fixed Mast.......................................3-58Antilock Brake System (ABS)............................. 4-5
Antilock Brake, System Warning Light................3-34
Antilock Brakes, Trailer System Warning Light.....3-34
Appearance Care
Aluminum or Chrome-Plated Wheels..............5-98
Care of Safety Belts....................................5-96
Chemical Paint Spotting..............................5-100
Cleaning Exterior Lamps/Lenses....................5-97
Fabric/Carpet..............................................5-95
Finish Care.................................................5-97
Finish Damage............................................5-99
Instrument Panel, Vinyl, and Other Plastic
Surfaces.................................................5-96
Interior Cleaning..........................................5-94
Sheet Metal Damage...................................5-99
Tires..........................................................5-99
Underbody Maintenance.............................5-100
Vehicle Care/Appearance Materials...............5-100
Washing Your Vehicle...................................5-97
Weatherstrips..............................................5-96
Windshield and Wiper Blades........................5-98
Ashtray.........................................................3-20
Audio System.................................................3-47
Chime Level Adjustment...............................3-58
Fixed Mast Antenna.....................................3-58
Radio Reception..........................................3-58
Setting the Clock.........................................3-48
Theft-Deterrent Feature................................3-57
1
Audio System(s).............................................3-48
Automatic Transmission
Fluid..........................................................5-43
Operation...................................................2-29
B
Battery..........................................................5-66
Bench Seat, Split............................................. 1-6
Brake
Diesel Engine Exhaust.................................2-26
Emergencies................................................ 4-5
Exhaust Indicator Light.................................3-40
Trailer Hand Control Valve.............................. 4-6
Brakes..........................................................5-57
Hydraulic Systems......................................... 4-4
Parking Brake Burnish Procedure...................2-43
System Warning Light..................................3-32
Braking........................................................... 4-4
Braking in Emergencies..................................... 4-5
Break-In, New Vehicle.....................................2-10
Bucket Seats................................................... 1-2
Bulb Replacement...........................................5-76
Buying New Tires...........................................5-85
C
California Perchlorate Materials Requirements....... 5-5
California Proposition 65 Warning....................... 5-5Capacities and Specifications..........................5-109
Carbon Monoxide...................................2-45, 4-16
Care of
Safety Belts................................................5-96
Center Console Storage Area...........................2-53
Change Fuel Filter Warning Light......................3-44
Charging System Light....................................3-30
Check
Engine Light...............................................3-36
Gages Warning Light...................................3-42
Checking Things Under the Hood......................5-22
Chemical Paint Spotting.................................5-100
Child Restraints
Child Restraint Systems...............................1-35
Infants and Young Children...........................1-31
Lower Anchors and Tethers for Children..........1-40
Older Children.............................................1-28
Securing a Child Restraint in a Rear Outside
Seat Position...........................................1-40
Securing a Child Restraint in the Center Front
Seat Position...........................................1-44
Securing a Child Restraint in the Center Rear
Seat Position...........................................1-42
Securing a Child Restraint in the Right Front
Seat Position...........................................1-44
Where to Put the Restraint...........................1-38
Chime Level Adjustment..................................3-58
Cigarette Lighter.............................................3-20
2
Cleaning
Aluminum or Chrome-Plated Wheels..............5-98
Exterior Lamps/Lenses.................................5-97
Fabric/Carpet..............................................5-95
Finish Care.................................................5-97
Instrument Panel, Vinyl, and Other Plastic
Surfaces.................................................5-96
Interior.......................................................5-94
Tires..........................................................5-99
Underbody Maintenance.............................5-100
Washing Your Vehicle...................................5-97
Weatherstrips..............................................5-96
Windshield and Wiper Blades........................5-98
Climate Control System...................................3-20
Outlet Adjustment........................................3-23
Rear Heating System...................................3-24
Clock, Setting.................................................3-48
Collision Damage Repair................................... 7-6
Control of a Vehicle.......................................... 4-3
Coolant
Engine Temperature Gage............................3-35
Heater, Engine............................................2-25
Low Warning Light.......................................3-35
Surge Tank Pressure Cap.............................5-47
Cooling System..............................................5-50
Cruise Control................................................3-10
Customer Assistance Information
Customer Assistance for Text
Telephone (TTY) Users............................... 7-3
Customer Assistance Offices........................... 7-4Customer Assistance Information (cont.)
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-5
Reporting Safety Defects to General Motors...... 7-9
Reporting Safety Defects to the Canadian
Government.............................................. 7-9
Reporting Safety Defects to the United
States Government.................................... 7-9
Roadside Assistance Program......................... 7-5
Service Publications Ordering Information........7-10
D
Daytime Running Lamps..................................3-15
Daytime Running Lamps Indicator Light.............3-41
Defensive Driving............................................. 4-2
Diesel
Running Out of Fuel....................................2-50
Diesel Engine.................................................2-26
Engine Alarm and Automatic Shutdown...........2-18
Exhaust Restrictor.......................................2-22
Fuel............................................................ 5-9
High Idle System.........................................2-20
Starting......................................................2-14
Diesel Particulate Filter....................................2-46
Diesel Particulate Filter Warning Light................3-45
Differential Lock Control, Rear Axle..................... 4-7
Differential Lock Indicator Light.........................3-40
Doing Your Own Service Work........................... 5-6
3
Specifications, Capacities...............................5-109
Speedometer..................................................3-26
Split Bench Seat.............................................. 1-6
Starting Diesel Engine.....................................2-14
Starting the Gasoline Engine............................2-12
Steering.......................................................... 4-9
Steering Wheel, Tilt Wheel................................. 3-7
Storage Areas................................................2-53
Center Console Storage Area........................2-53
Stuck in Sand, Mud, Ice, or Snow.....................4-19
Sun Visors...................................................... 2-9
Suspension, Air..............................................2-44
Switchbanks, Instrument Panel..........................3-18
T
Tachometer....................................................3-26
Theft-Deterrent, Radio.....................................3-57
Tilt Wheel........................................................ 3-7
Time, Setting..................................................3-48
Tires.............................................................5-82
Aluminum or Chrome-Plated Wheels,
Cleaning.................................................5-98
Buying New Tires........................................5-85
Cleaning....................................................5-99
Dual Tire Operation.....................................5-84
If a Tire Goes Flat.......................................5-92
Inflation - Tire Pressure................................5-82
Tightening the Wheel Nuts............................5-86Tires (cont.)
Wheel Alignment and Tire Balance.................5-86
Wheel Loading............................................5-83
Wheel Replacement.....................................5-90
When It Is Time for New Tires......................5-84
Tow Hooks.....................................................4-20
Towing
Your Vehicle...............................................4-24
Traction
Control System (TCS).................................... 4-8
Trailer
Connections................................................4-26
Trailer Brake Hand Control Valve........................ 4-6
Transmission
Fluid, Automatic...........................................5-43
Fluid, Manual..............................................5-43
Service Warning Light..................................3-31
Temperature Gage.......................................3-39
Transmission Operation, Automatic....................2-29
Transmission Operation, Manual........................2-30
Trip Odometer................................................3-26
Turn and Lane-Change Signals.......................... 3-8
Turn Signal/Multifunction Lever........................... 3-7
Two-Speed Rear Axle......................................2-27
U
Using this Manual................................................ ii
11