2004 GMC ENVOY transmission

Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition key to LOCK in each shift lever position.
The key should turn to LOCK only when the
shift lever is in PARK (P).
The key should come out only in LOCK.
Contact your GM Goodwrench dealer if service is
required.
Parking Brake and Automatic
Transmission Park (P) Mechanism Check
{CAUTION:
When you are doing this check, your vehicle
could begin to move. You or others could be
injured and property could be damaged. Make
sure there is room in front of your vehicle in
case it begins to roll. Be ready to apply the
regular brake at once should the vehicle begin
to move.Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake, set the
parking brake.
To check the parking brake’s holding ability: With
the engine running and transmission in
NEUTRAL (N), slowly remove foot pressure from
the regular brake pedal. Do this until the vehicle is
held by the parking brake only.
To check the PARK (P) mechanism’s holding ability:
With the engine running, shift to PARK (P). Then
release the parking brake followed by the regular
brake.
Contact your GM Goodwrench dealer if service is
required.
Underbody Flushing Service
At least every spring, use plain water to ush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.
6-11

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

Normal Maintenance Replacement Parts
Replacement parts identied below by name, part number, or specication can be obtained from your dealer.
Part GM Part Number ACDelco®Part Number
Engine Oil Filter
L6 89017342 PF61
V8 25010633 PF44
Engine Air Cleaner/Filter 15036141 A2014C
Automatic Transmission Filter Kit 24200796 —
Spark Plugs
L6 25337472 41-981
V8 12571164 41–985
Fuel Filter 88983068 GF831
Windshield Wiper Blade (Performance Blade 22”) — 8–2221
Backglass Wiper Blade (Performance Blade 16”) — 8–2161
6-14

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

Audio System(s) (cont.)
Rear Seat Audio (RSA)...............................3-114
Setting the Time..........................................3-63
Theft-Deterrent Feature...............................3-116
Understanding Radio Reception...................3-117
XM™ Satellite Radio Antenna System...........3-120
Automatic Headlamp System............................3-15
Automatic Transfer Case..................................2-27
Automatic Transmission
Fluid..........................................................5-22
Operation...................................................2-24
B
Backglass Wiper Blade Replacement.................5-56
Backing Up....................................................4-62
Battery..........................................................5-42
BATTERY NOT CHARGING.............................3-60
Battery Replacement......................................... 2-7
Battery Run-Down Protection............................3-19
Before Leaving on a Long Trip.........................4-35
Before You Drive...........................................3-104
Before You Go Off-Roading..............................4-15
Brake
Parking......................................................2-30
System Warning Light..................................3-38
Brake Adjustment............................................5-41
Brake Fluid....................................................5-39Brake Pedal, Throttle.......................................2-22
Brake Pedal Travel.........................................5-41
Brake Wear...................................................5-41
Brakes..........................................................5-39
Braking........................................................... 4-6
Braking in Emergencies..................................... 4-8
Break-In, New Vehicle.....................................2-19
Bulb Replacement...........................................5-52
Front Turn Signal and Sidemarker Lamps.......5-52
Halogen Bulbs............................................5-52
Headlamps.................................................5-52
Replacement Bulbs......................................5-54
Taillamps and Turn Signal Lamps..................5-52
Buying New Tires...........................................5-68
C
California Fuel.................................................. 5-5
Canada........................................................... 7-4
Canadian Owners................................................ ii
Canadian Roadside Assistance........................... 7-7
Capacities and Specications..........................5-115
Carbon Monoxide...................4-38, 4-55, 2-14, 2-34
Care of
Safety Belts................................................5-94
Your Cassette Tape Player..........................3-118
Your CD and DVD Player...........................3-119
Your CDs and DVDs..................................3-119
2

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

Towing
Recreational Vehicle.....................................4-44
Towing a Trailer..........................................4-55
Your Vehicle...............................................4-43
Traction
Assist System (TAS)...................................... 4-8
Trailer Brakes.................................................4-60
Trailer Wiring Harness.....................................4-66
Transfer Case................................................5-50
Transmission
Fluid, Automatic...........................................5-22
Transmission Operation, Automatic....................2-24
Transmission, Transaxle, Transfer Case Unit
Repair Manual............................................7-12
Transportation Options...................................... 7-8
Travel Note Recorder......................................2-46
Traveling to Remote Areas...............................4-17
Trip Information..............................................3-51
Trip Odometer................................................3-34
Turn and Lane Change Signals.......................... 3-8
TURN SIGNAL ON.........................................3-60
Turn Signal/Multifunction Lever........................... 3-7
Turn Signals When Towing a Trailer..................4-63
Two-Wheel-Drive Vehicles................................4-45U
Understanding Radio Reception.......................3-117
Uniform Tire Quality Grading............................5-69
United States................................................... 7-4
Used Replacement Wheels..............................5-72
Using Cleaner on Fabric..................................5-92
Using HomeLink
®...........................................2-44
Using Song List Mode...................................3-101
V
Vehicle
Control........................................................ 4-5
Damage Warnings........................................... iv
Loading......................................................4-48
Symbols......................................................... iv
Vehicle Data Collection and Event Data Records....7-10
Vehicle Identication
Number (VIN).............................................5-99
Service Parts Identication Label..................5-100
Vehicle Personalization
Memory Seat..............................................2-52
16