2004 GMC ENVOY steering

(A) Light Truck (LT-Metric) Tire:The United States
version of a metric tire sizing system. The letter “LT” as
the rst two characters in the tire size means a light
truck tire engineered to standards set by the U. S. Tire
and Rim Association.
(B) Tire Width:The three-digit number indicates the
tire section width in millimeters from sidewall to sidewall.
(C) Aspect Ratio:A two-digit number that indicates
the tire height-to-width measurements. For example, if
the tire size aspect ratio is “75,” as shown in item “C” of
the illustration, it would mean that the tire’s sidewall is
75% as high as it is wide.(D) Construction Code:A letter code is used to
indicate the type of ply construction in the tire. The letter
“R” means radial ply construction; the letter “D” means
diagonal or bias ply construction; and the letter “B”
means belted-bias ply construction.
(E) Rim Diameter:Diameter of the wheel in inches.
(F) Service Description:The service description
indicates the load range and speed rating of a tire. The
load index can range from 1 to 279. Speed ratings
range from “A” to “Z”. The light truck tire size example
above shows dual or single tire congurations.Tire Terminology and Denitions
Air Pressure:The amount of air inside the tire pressing
outward on each square inch of the tire. Air pressure
is expressed in pounds per square inch (psi) or
kilopascal (kPa).
Accessory Weight:This means the combined weight
of optional accessories. Some examples of optional
accessories are, automatic transmission, power steering,
power brakes, power windows, power seats, and air
conditioning. Light Truck (LT-Metric) Tire
5-62

If a Tire Goes Flat
It’s unusual for a tire to “blowout” while you’re driving,
especially if you maintain your tires properly. If air goes
out of a tire, it’s much more likely to leak out slowly.
But if you should ever have a “blowout,” here are a few
tips about what to expect and what to do:
If a front tire fails, the at tire will create a drag that
pulls the vehicle toward that side. Take your foot off the
accelerator pedal and grip the steering wheel rmly.
Steer to maintain lane position, and then gently brake to
a stop well out of the traffic lane.
A rear blowout, particularly on a curve, acts much like a
skid and may require the same correction you’d use
in a skid. In any rear blowout, remove your foot from the
accelerator pedal. Get the vehicle under control by
steering the way you want the vehicle to go. It may be
very bumpy and noisy, but you can still steer. Gently
brake to a stop, well off the road if possible.{CAUTION:
Lifting a vehicle and getting under it to do
maintenance or repairs is dangerous without
the appropriate safety equipment and training.
The jack provided with your vehicle is
designed only for changing a at tire. If it is
used for anything else, you or others could be
badly injured or killed if the vehicle slips off
the jack. Use the jack provided with your
vehicle only for changing a at tire.
If a tire goes at, the next part shows how to use your
jacking equipment to change a at tire safely.
5-75

Scheduled Maintenance
Service MaintenanceIMaintenanceII
Change engine oil and lter. Reset oil life system. SeeEngine Oil on
page 5-16.An Emission Control Service.••
Visually check for any leaks or damage.See footnote (j).••
Inspect engine air cleaner lter. If necessary, replace lter. SeeEngine Air
Cleaner/Filter on page 5-21.An Emission Control Service. See footnote †.••
Rotate tires and check ination pressures and wear. SeeTires on page 5-57.••
Inspect brake system.See footnote (a).••
Check engine coolant and windshield washer uid levels and add uid as
needed.••
Perform any needed additional services. See “Additional Required Services” in
this section.••
Inspect suspension and steering components.See footnote (b).•
Inspect engine cooling system.See footnote (c).•
Inspect wiper blades.See footnote (d).•
Inspect restraint system components.See footnote (e).•
Lubricate body components.See footnote (f).•
Check transmission uid level and add uid as needed.•
6-5

Additional Required Services (cont’d)
Service25,000
(41 500)50,000
(83 000)75,000
(125 000)100,000
(166 000)125,000
(207 500)150,000
(240 000)
Replace spark plugs.An Emission
Control Service.•
V8 engine only: Inspect spark plug
wires.An Emission Control Service.•
Engine cooling system service
(or every 5 years, whichever occurs
rst).An Emission Control Service.
See footnote (i).•
Inspect engine accessory drive belt.
An Emission Control Service.•
Maintenance Footnotes
†The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to
the completion of the vehicle’s useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the
maintenance be recorded.(a)Visually inspect brake lines and hoses for proper
hook-up, binding, leaks, cracks, chang, etc. Inspect
disc brake pads for wear and rotors for surface
condition. Inspect other brake parts, including calipers,
parking brake, etc.
(b)Visually inspect front and rear suspension and
steering system for damaged, loose or missing parts or
signs of wear. Inspect power steering lines and
hoses for proper hook-up, binding, leaks, cracks,
chang, etc.
6-7

Recommended Fluids and
Lubricants
Fluids and lubricants identied below by name, part
number or specication may be obtained from your
dealer.
Usage Fluid/Lubricant
Engine OilEngine oil which meets GM
Standard GM6094M and displays
the American Petroleum Institute
Certied for Gasoline Engines
starburst symbol. To determine the
proper viscosity for your vehicle’s
engine, seeEngine Oil on
page 5-16.
Engine Coolant50/50 mixture of clean, drinkable
water and use only
DEX-COOL
®Coolant. SeeEngine
Coolant on page 5-25.
Hydraulic Brake
SystemDelco Supreme 11 Brake Fluid or
equivalent DOT-3 brake uid.
Windshield
Washer SolventGM Optikleen
®Washer Solvent.
Usage Fluid/Lubricant
Parking Brake
Cable GuidesChassis Lubricant (GM Part No.
U.S. 12377985, in Canada
88901242) or lubricant meeting
requirements of NLGI #2, Category
LB or GC-LB.
Power Steering
SystemGM Power Steering Fluid (GM Part
No. U.S. 89021184, in Canada
89021186).
Automatic
TransmissionDEXRON
®-III Automatic
Transmission Fluid.
Key Lock
CylindersMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474).
Chassis
LubricationChassis Lubricant (GM Part No.
U.S. 12377985, in Canada
88901242) or lubricant meeting
requirements of NLGI #2, Category
LB or GC-LB.
Front and
Rear AxleSAE 75W-90 Synthetic Axle
Lubricant (GM Part No. U.S.
12378261, in Canada 10953455)
meeting GM Specication 9986115.
6-12

Service Publications Ordering
Information
Service Manuals
Service Manuals have the diagnosis and repair
information on engines, transmission, axle, suspension,
brakes, electrical, steering, body, etc.
RETAIL SELL PRICE: $120.00
Transmission, Transaxle, Transfer
Case Unit Repair Manual
This manual provides information on unit repair service
procedures, adjustments, and specications for GM
transmissions, transaxles, and transfer cases.
RETAIL SELL PRICE: $50.00
Service Bulletins
Service Bulletins give technical service information
needed to knowledgeably service General Motors cars
and trucks. Each bulletin contains instructions to
assist in the diagnosis and service of your vehicle.
In Canada, information pertaining to Product Service
Bulletins can be obtained by contacting your General
Motors dealer or by calling 1-800-GM-DRIVE
(1-800-463-7483).
7-12

A
Accessory Inator...........................................5-73
Accessory Power Outlets.................................3-19
Adding a Snow Plow or Similar Equipment.........4-55
Adding Washer Fluid.......................................5-38
Additional Program Information........................... 7-9
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment...........................5-100
Adjustable Throttle and Brake Pedal..................2-22
Adjusting the Speakers
(Balance/Fade)............................3-67, 3-78, 3-93
After Off-Road Driving.....................................4-28
Air Bag
Readiness Light..........................................3-35
Air Bag Systems.............................................1-51
How Does an Air Bag Restrain?....................1-58
Servicing Your Air Bag-Equipped Vehicle.........1-61
What Makes an Air Bag Inate?....................1-58
What Will You See After an Air Bag Inates? . . 1-59
When Should an Air Bag Inate?...................1-57
Where Are the Air Bags?..............................1-55
Air Cleaner/Filter, Engine.................................5-21
Airbag Sensing and Diagnostic Module (SDM)....7-10
All Overseas Locations...................................... 7-5
AM .............................................................3-117
Antenna, Fixed Mast......................................3-120
Antenna, XM™ Satellite Radio Antenna System . . . 3-120
Anti-lock Brake System..................................... 4-6Anti-Lock Brake, System Warning Light..............3-39
Appearance Care............................................5-91
Care of Safety Belts....................................5-94
Chemical Paint Spotting...............................5-98
Cleaning the Inside of Your Vehicle................5-92
Cleaning the Outside of Your Vehicle..............5-95
Finish Damage............................................5-97
Sheet Metal Damage...................................5-97
Underbody Maintenance...............................5-98
Vehicle Care/Appearance Materials................5-98
Weatherstrips..............................................5-94
Approaching a Hill..........................................4-20
Ashtrays........................................................3-20
Audio Output................................................3-112
Audio System(s).............................................3-63
Audio Steering Wheel Controls....................3-116
Care of Your Cassette Tape Player...............3-118
Care of Your CD and DVD Player................3-119
Care of Your CDs and DVDs.......................3-119
Chime Level Adjustment.............................3-120
Fixed Mast Antenna...................................3-120
Navigation/Radio System.............................3-103
Audio Systems
Radio Personalization.................................3-115
Audio System(s)
Radio with Cassette and CD.........................3-75
Radio with CD............................................3-64
Radio with Six-Disc CD................................3-90
1

Engine (cont.)
Coolant Heater............................................2-23
Coolant Temperature Gage...........................3-39
Drive Belt Routing.......................................6-15
Engine Compartment Overview......................5-12
Exhaust.....................................................2-34
Fan Noise..................................................5-36
Oil .............................................................5-16
Overheating................................................5-28
Reduced Power Light...................................3-46
Starting......................................................2-21
Engine Compartment Fuse Block.....................5-102
ENGINE COOLANT HOT/ENGINE
OVERHEATED............................................3-60
Engine Oil Additives........................................5-19
Entertainment System
Cleaning the Video Screen..........................3-119
DVD Distortion..........................................3-117
Entry Lighting.................................................3-18
Environmental Concerns..................................4-17
Erasing HomeLink
®Buttons..............................2-44
Event Data Records (EDR)..............................7-10
Exit Lighting...................................................3-18
Express–Down Window....................................2-16
Extender, Safety Belt.......................................1-28
Exterior Lamps...............................................3-15
F
Filter
Engine Air Cleaner......................................5-21
Finding a Program Type (PTY)
Station (RDS and XM™)..............3-68, 3-79, 3-93
Finding a Station............................3-66, 3-77, 3-91
Finish Care....................................................5-95
Finish Damage...............................................5-97
Fixed Mast Antenna.......................................3-120
Flash-to-Pass................................................... 3-9
Flat Tire........................................................5-75
Flat Tire, Changing.........................................5-76
Fluid
Automatic Transmission................................5-22
Power Steering...........................................5-37
Windshield Washer......................................5-38
FM Stereo....................................................3-117
Fog Lamps....................................................3-17
Following Distance..........................................4-62
Four-Wheel Drive....................................2-26, 5-50
Front Axle......................................................5-51
Front Storage Area.........................................2-46
Fuel............................................................... 5-4
Additives...................................................... 5-6
California Fuel.............................................. 5-5
6