(33)= Clean and lubricate air brake automatic slack
adjuster. Check pushrod travel and auto adjustment
operation. Have serviced if needed.
(34)= Air brake chamber service: Check operation,
mounting clamps, and air lines and check for leaks.
(35)= Trailer brake hand control valve service: Check
operation; lubricate cam and follower.
(36)= Tighten the wheel stud nuts to the specified
torque values at 100 miles (160 km). Thereafter, tighten
them 1,000 miles (1 600 km) after each time the wheel
is removed. SeeTightening the Wheel Nuts on
page 5-86.
(37)= Inspect and clean any accumulated dirt, gravel,
or other foreign objects from the valves and valve boots
as needed. Using light oil, lubricate brake pedal to
brake application valve linkage components. Check any
rubber boots for cracks, holes, or deterioration and
replace if necessary.(38)= Estimated minimum. Actual mileage depends on
fuel and oil consumed.
(39)= If the vehicle has the Isuzu diesel engine and is
used primarily for long trip, highway service, change
the engine oil and filter every 18,000 miles (28 800 km),
or every 12 months, or every 750 hours of engine
operation, whichever occurs first.
(40)= Make sure any safety belt reminder light and
safety belt assemblies are working properly. Look
for any other loose or damaged safety belt system parts.
If you see anything that might keep a safety belt
system from doing its job, have it repaired. Have any
torn or frayed safety belts replaced.
6-25
Automatic Transmission Shift Indicator
Check
Check that the indicator points to the gear chosen.
Steering Check
Be alert for any changes in steering action, abnormal
front tire wear or steering wheel position. An inspection
or service is needed when the steering wheel is harder
to turn or has too much free play, or if there are strange
sounds when turning or parking.
Brake System Check
Be alert to the low air warning light or tone alarm, or
changes in braking action, such as repeated pulling to
one side, unusual sounds when braking or increased
brake pedal travel. Make sure air brake system
reservoirs are drained daily with full system air pressure,
and check system for leaks. Any of these conditions
could indicate the need for brake system inspection
and/or service.
Engine Cooling System Service
Inspect the hoses and have them replaced if they are
cracked, swollen, or deteriorated. Inspect all pipes,
fittings, and clamps; replace as needed. Clean the
outside of the radiator and air conditioning condenser.
To help ensure proper operation, a pressure test of the
cooling system and pressure cap is recommended at
least once a year.
Exhaust System Inspection
Be alert for any changes in the sound of the exhaust
system or any smell of fumes. These are signs the
system may be leaking. Have it checked and/or repaired
at once. SeeEngine Exhaust on page 2-45and
Running the Vehicle While Parked on page 2-50.
Check to be sure that mud or dirt is not caked on the
exhaust system, especially in the area of the diesel
particulate filter and tailpipe. Clean the area as needed.
SeeDiesel Particulate Filter (Diesel Engine) on
page 2-46.
At high mileages, the DPF becomes loaded with ash.
This is normal. When the amount of ash loading is high,
see your dealer/retailer for DPF cleaning or replacement.
6-28
Windshield Wipers and Washers Check
Check operation and condition of the wiper blades.
Check the flow of the washer spray.
Defroster Check
Move the control to the defrost symbol and the fan to HI
or the high symbol. Then check the airflow from the
ducts at the inside base of the windshield.
Mirrors and Sun Visors Check
Check that friction joints hold mirrors and sun visors
in place.
Seat Adjuster Check
When adjusting a manual seat, be sure seat adjusters
latch by attempting to move the seat after latching.
Lamps Check
Check panel lighting, warning lights, indicator lights, and
interior lamps. On the outside, check: license plate
lamps, sidemarker lamps, reflectors or lights on outside
mirrors, headlamps, parking lamps, identification and
clearance lamps, taillamps, brake lamps, turn signals,
backup lamps, and hazard warning flashers. Have
headlamp aim checked at once if beams seem
improperly aimed.
Glass, Mirrors, Lamps, and/or
Re ectors Condition Check
Look for broken, scratched, dirty, or damaged glass,
mirrors, lamps, or reflectors that could reduce the view
or visibility or cause injury. Replace, clean, or repair
promptly.
Door Latches Check
Check that doors close, latch, and lock tightly. Check for
broken, damaged, or missing parts that might prevent
tight latching.
Hood Latches Check
Check that the hood closes firmly. Check for broken,
damaged, loose, or missing parts that might prevent
tight latching. Make sure the secondary latch, if the
vehicle has one, keeps the hood from opening all the way
when the primary latch is released.
Fluid Leaks Check
Check for fuel, coolant, oil, or other fluid leaks by
looking at the surface beneath the vehicle after it has
been parked for awhile.
6-29
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
Dome Lamps.................................................3-16
Door
Locks.......................................................... 2-6
Power Door Locks......................................... 2-7
Driving
At Night.....................................................4-13
Defensive..................................................... 4-2
Drunken....................................................... 4-3
Highway Hypnosis.......................................4-15
Hill and Mountain Roads..............................4-15
In Rain and on Wet Roads...........................4-14
Rocking Your Vehicle to Get it Out.................4-20
Tow Hooks.................................................4-20
Winter........................................................4-16
Dual Tire Operation.........................................5-84
E
EDR .............................................................7-11
Electrical System
Add-On Equipment.....................................5-102
Fuses and Circuit Breakers.........................5-103
Fusible Links.............................................5-103
Headlamp Wiring.......................................5-102
Instrument Panel Fuse Block.......................5-103
Power Windows and Other Power Options....5-103
Underhood Fuse Block...............................5-106
Windshield Wiper Fuses.............................5-102Engine
Air Cleaner/Filter.........................................5-39
Alarm and Automatic Shutdown.....................2-18
Change Engine Oil Light...............................3-38
Check and Service Engine Soon Light............3-36
Checks Before Operating..............................2-23
Coolant......................................................5-44
Coolant Heater............................................2-25
Coolant Temperature Gage...........................3-35
Diesel Engine Exhaust Brake........................2-26
Drive Belt Routing......................................5-117
Exhaust.....................................................2-45
Exhaust Restrictor.......................................2-22
Fan Breakage............................................... 5-6
Fan Noise..................................................5-54
High Idle System.........................................2-20
Oil ....................................5-23, 5-24, 5-28, 5-32
Oil Life System...........................5-36, 5-37, 5-39
Overheating................................................5-48
Reduced Power Light...................................3-41
Shutdown Warning Light...............................3-39
Speed Limiter.............................................3-27
Starter Over-Crank Protection........................2-12
Starting Diesel............................................2-14
Starting the Gasoline...................................2-12
Engine Overspeed Warning Light......................3-39
Entry Lighting.................................................3-17
Event Data Recorders.....................................7-11
4
Exhaust Brake Indicator Light...........................3-40
Exhaust Restrictor...........................................2-22
Extender, Safety Belt.......................................1-28
Exterior Lamps...............................................3-14
F
Filter
Engine Air Cleaner......................................5-39
Filter Minder Gage..........................................3-45
Finish Damage...............................................5-99
Fixed Mast Antenna........................................3-58
Flashers, Hazard Warning.................................. 3-6
Flat Tire........................................................5-92
Fluid.............................................................5-43
Power Steering...........................................5-54
Windshield Washer......................................5-55
Four-Wheel Drive....................................2-32, 5-73
Front Axle......................................................5-74
Front Wheel Bearings with Oil-Filled Hubs..........5-81
Fuel............................................................... 5-7
Additives...................................................... 5-8
Change Filter Warning Light..........................3-44
Diesel Engine Fuel........................................ 5-9
Filling a Portable Fuel Container....................5-21
Filling the Tank...........................................5-20
Filter..........................................................5-78
Filter Replacement.......................................5-18
Fuels in Foreign Countries............................5-19Fuel (cont.)
Gage.........................................................3-43
Gasoline Octane........................................... 5-7
Gasoline Specifications.................................. 5-7
Primary Filter and Water Separator................5-79
Running Out of...........................................2-50
Running Out of Fuel....................................5-17
Secondary Filter and Water Separator/
Heater....................................................5-80
Very Cold Weather Operation........................5-12
Water in Fuel..............................................5-12
Water in Warning Light.................................3-44
What Fuel to Use.......................................... 5-9
Fuses
Fuses and Circuit Breakers.........................5-103
Instrument Panel Fuse Block.......................5-103
Underhood Fuse Block...............................5-106
Windshield Wiper.......................................5-102
G
Gage
Air Pressure...............................................3-46
Check Gages Warning Light..........................3-42
Engine Coolant Temperature.........................3-35
Filter Minder...............................................3-45
Fuel..........................................................3-43
Hourmeter..................................................3-46
Oil Pressure...............................................3-37
5