At Least Twice a Year
Wiper Blade Check
Inspect wiper blades for wear, cracking, or
contamination. Clean the windshield and wiper blades, if
contaminated. Replace wiper blades that are worn or
damaged. SeeWindshield Wiper Blade Replacement on
page 5-76andWindshield and Wiper Blades on
page 5-98for more information.
Weatherstrip Lubrication
Silicone grease on weatherstrips will make them last
longer, seal better, and not stick or squeak. Apply
silicone grease with a clean cloth. During very cold,
damp weather more frequent application may be
required. Part C tells you what to use.
Body Lubrication Service
Lubricate all exposed surfaces such as door checks,
door lock bolts, lock strike plates, door hinge bushings,
latches, and dovetail bumper wedges. Where oil holes
are provided, a dripless oil can be used. The seat
adjusters, seat track, door weatherstrips, and rubber cap
bumpers should also be lubricated. Part C tells you what
to use. More frequent lubrication may be required when
exposed to a corrosive environment.
Parking Brake Check
Park on a fairly steep hill and hold the vehicle with the
parking brake only. This checks holding ability. See
Parking Brake (With Hydraulic Brakes) on page 2-38or
Parking Brake (With Air Brakes) on page 2-41.
Starter Switch Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular
brakes.
Do not use the accelerator pedal, and be ready to
turn off the engine immediately if it starts.
3. On automatic transmission vehicles, try to start the
engine in each gear. The starter should work only
in PARK (P) or NEUTRAL (N). If the starter works in
any other position, your vehicle needs service. On
manual transmission vehicles, the starter should
work only when the clutch pedal is all the way down.
6-27
Part C: Recommended Fluids and
Lubricants
Fluids and lubricants identified below by name, part
number, or specification can be obtained from your
dealer/retailer.
Usage Fluid/Lubricant
Engine Oil
(Gasoline
Engine)Engine oil which meets
GM Standard GM6094M and
displays the American Petroleum
Institute (API) Certified for Gasoline
Engines starburst symbol. To
determine the proper viscosity for
your vehicle’s engine, see “Engine
Oil” in the Index.
Engine Oil
(DURAMAX
®/
Isuzu Diesel
Engines)Engine oils with the letters CJ-4 are
required for your vehicle. The CJ-4
designation can appear either alone
or in combination with other
American Petroleum Institute (API)
designations, such as API CJ-4/SL.
These letters show API levels of
quality. To determine the preferred
viscosity for your vehicle’s diesel
engine, see “Engine Oil” in the Index.
Engine Oil
(Caterpillar
®
Diesel Engine)See the Caterpillar
®Operation &
Maintenance Manual for engine oil
recommendations.
Usage Fluid/Lubricant
Engine Coolant
(Caterpillar
®
Diesel Engine)See the Caterpillar
®Operation &
Maintenance Manual for engine
coolant recommendations.
Engine Coolant
(Gasoline
Engine &
DURAMAX
®/
Isuzu Diesel
Engines)50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant. SeeEngine Coolant
(Caterpillar®Diesel Engines) on
page 5-44orEngine Coolant
(Gas and DURAMAX
®/Isuzu 7.8L
L6 Engines) on page 5-44.
Hydraulic Brake
SystemDelco
®Supreme 11 Brake Fluid or
equivalent DOT-3 brake fluid.
Windshield
Washer SolventOptikleen
®Washer Solvent.
Clutch Bearing
LubricantClutch Bearing Lubricant
(GM Part No. 12378484 or
equivalent NLGI #3 consistency).
Exhaust Brake
Ball Joint Cap
LubricantHigh-Temperature Grease
(GM Part No. U.S. 1051344, in
Canada 903037) or NLGI #3
consistency.
Power Steering
SystemDEXRON
®-VI Automatic
Transmission Fluid.
Manual
TransmissionSynthetic Manual Transmission Fluid
(GM Part No. U.S. 88861952, in
Canada 88861953).
6-31
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
L
Lamps
Dome........................................................3-16
Marker.......................................................3-16
Reading.....................................................3-17
Lap Belt........................................................1-27
Lap-Shoulder Belt...........................................1-24
LATCH System
Child Restraints...........................................1-40
Light
Airbag Off..................................................3-29
Airbag Readiness........................................3-28
Antilock Brake System Warning.....................3-34
Brake System Warning.................................3-32
Change Engine Oil......................................3-38
Change Fuel Filter Warning..........................3-44
Charging System.........................................3-30
Check Gages Warning.................................3-42
Daytime Running Lamps Indicator..................3-41
Diesel Particulate Filter Warning....................3-45
Differential Lock Indicator..............................3-40
Engine Overspeed Warning...........................3-39
Engine Shutdown Warning............................3-39
Exhaust Brake Indicator................................3-40
Highbeam On.............................................3-41Light (cont.)
Low Coolant Warning...................................3-35
Low Oil Level.............................................3-38
Low Washer Fluid Warning...........................3-42
Malfunction Indicator....................................3-36
Power Take-Off...........................................3-42
Range Inhibit Warning Indicator.....................3-32
Reduced Engine Power................................3-41
Safety Belt Reminders..................................3-27
Service Transmission Warning.......................3-31
Trailer Antilock Brake System Warning............3-34
Wait to Start Indicator..................................3-36
Water in Fuel Warning.................................3-44
Lighting
Entry.........................................................3-17
Lights
Exterior Lamps............................................3-14
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-15
Loading Your Vehicle.......................................4-21
Locks
Door........................................................... 2-6
Power Door.................................................. 2-7
Loss of Control...............................................4-12
Low Coolant Warning Light..............................3-35
Low Washer Fluid Warning Light.......................3-42
7
M
Maintenance, Replacement Parts.....................5-115
Maintenance Schedule
At Each Fuel Fill.........................................6-25
At Least Once a Year..................................6-29
At Least Twice a Year..................................6-26
How This Section is Organized....................... 6-2
Introduction.................................................. 6-2
Maintenance Requirements............................. 6-2
Part A - Scheduled Maintenance Services......... 6-3
Part B - Owner Checks and Services.............6-25
Part C - Recommended Fluids and
Lubricants...............................................6-30
Part D - Maintenance Record........................6-32
Scheduled Maintenance................................. 6-4
Scheduled Maintenance Supplements............... 6-4
Using.......................................................... 6-3
Your Vehicle and the Environment................... 6-2
Malfunction Indicator Light................................3-36
Manual Transmission
Fluid..........................................................5-43
Operation...................................................2-30
Manual, Using..................................................... ii
Manual Windows.............................................. 2-8
Marker Lamps................................................3-16
Mirrors
Manual Rearview Mirror................................2-51
Outside Convex Mirrors................................2-52
Outside Heated Mirrors................................2-52Mirrors (cont.)
Outside Manual Mirrors................................2-51
Outside Power Mirrors..................................2-51
N
Navigation System, Privacy..............................7-12
New Vehicle Break-In......................................2-10
Noise Control System, Tampering......................5-75
O
Odometer......................................................3-26
Odometer, Trip...............................................3-26
Off-Road Recovery..........................................4-11
Oil
Change Engine Oil Light...............................3-38
Engine...............................5-23, 5-24, 5-28, 5-32
Low Oil Level Light......................................3-38
Pressure Gage............................................3-37
Oil, Engine Oil Life System..............5-36, 5-37, 5-39
Older Children, Restraints................................1-28
OnStar, Privacy..............................................7-12
Other Service Items
Front Wheel Bearings with Oil-Filled Hubs.......5-81
Primary Fuel Filter and Water Separator.........5-79
Secondary Fuel Filter and Water
Separator/Heater......................................5-80
Other Warning Devices...................................... 3-6
8