2004 GMC ENVOY oil pressure

Cooling System
When you decide it’s safe to lift the hood, here’s what
you’ll see:
A. Coolant Recovery Tank
B. Radiator Pressure Cap
C. Engine Fan
If the coolant inside the coolant recovery tank is boiling,
don’t do anything else until it cools down. The vehicle
should be parked on a level surface. L6 Engine
V8 Engine
5-30

Aspect Ratio:The relationship of a tire’s height to
its width.
Belt:A rubber coated layer of cords that is located
between the plies and the tread. Cords may be made
from steel or other reinforcing materials.
Bead:The tire bead contains steel wires wrapped by
steel cords that hold the tire onto the rim.
Bias Ply Tire:A pneumatic tire in which the plies are
laid at alternate angles less than 90 degrees to the
centerline of the tread.
Cold Ination Pressure:The amount of air pressure in
a tire, measured in pounds per square inch (psi) or
kilopascals (kPa) before a tire has built up heat
from driving. SeeInation - Tire Pressure on page 5-65.
Curb Weight:This means the weight of a motor
vehicle with standard and optional equipment including
the maximum capacity of fuel, oil and coolant, but
without passengers and cargo.DOT Markings:A code molded into the sidewall of a
tire signifying that the tire is in compliance with the U.S.
Department of Transportation motor vehicle safety
standards. The DOT code includes the Tire Identication
Number (TIN), an alphanumeric designator which can
also identify the tire manufacturer, production plant,
brand and date of production.
GVWR:Gross Vehicle Weight Rating, seeLoading
Your Vehicle on page 4-48.
GAWR FRT:Gross Axle Weight Rating for the front
axle, seeLoading Your Vehicle on page 4-48.
GAWR RR:Gross Axle Weight Rating for the rear axle,
seeLoading Your Vehicle on page 4-48.
Intended Outboard Sidewall:The side of an
asymmetrical tire, that must always face outward when
mounted on a vehicle.
Kilopascal (kPa):The metric unit for air pressure.
There are 6.9 kPa’s to one psi.
5-63

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

Owner Checks and Services
These owner checks and services should be performed
at the intervals specied to help ensure the safety,
dependability and emission control performance of your
vehicle. Your GM Goodwrench dealer can assist you
with these checks and services.
Be sure any necessary repairs are completed at once.
Whenever any uids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
inRecommended Fluids and Lubricants on page 6-12.
At Each Fuel Fill
It is important to perform these underhood checks at
each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-16for further
details.
Notice:It is important to check your oil regularly
and keep it at the proper level. Failure to keep your
engine oil at the proper level can cause damage
to your engine not covered by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOL®coolant mixture if necessary. SeeEngine
Coolant on page 5-25for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the windshield
washer tank and add the proper uid if necessary.
At Least Once a Month
Tire Ination Check
Visually inspect your tires and make sure tires are
inated to the correct pressures. Do not forget to check
your spare tire. SeeTires on page 5-57for further
details. Check to make sure the spare tire is stored
securely. Push, pull and then try to rotate or turn
the spare tire. If it moves, tighten it. SeeChanging a
Flat Tire on page 5-76.
6-9

Fuel (cont.)
Filling a Portable Fuel Container..................... 5-9
Filling Your Tank........................................... 5-7
Fuels in Foreign Countries.............................. 5-6
Gage.........................................................3-48
Gasoline Octane........................................... 5-4
Gasoline Specications.................................. 5-5
Low Warning Light.......................................3-49
Fuel Information..............................................3-52
FUEL LEVEL LOW.........................................3-61
Fuses
Fuses and Circuit Breakers.........................5-101
Windshield Wiper.......................................5-101
G
Gage
Check Gages Warning Light..........................3-47
Engine Coolant Temperature.........................3-39
Fuel..........................................................3-48
Oil Pressure...............................................3-44
Speedometer..............................................3-34
Tachometer.................................................3-35
Voltmeter Gage...........................................3-37
Garage Door Opener.......................................2-41
Gasoline
Octane........................................................ 5-4
Specications............................................... 5-5Gate Ajar Light...............................................3-48
Gate Operator and Canadian Programming........2-44
Getting Familiar with Off-Road Driving................4-18
Glove Box.....................................................2-45
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
H
Hazard Warning Flashers................................... 3-6
Head Restraints............................................... 1-5
Headlamp High/Low-Beam Changer.................... 3-9
Headlamp Washer..........................................3-11
Headlamps....................................................5-52
Bulb Replacement.......................................5-52
Electrical System.......................................5-100
Front Turn Signal and Sidemarker Lamps.......5-52
Halogen Bulbs............................................5-52
Headphones.................................................3-110
Heated Seats................................................... 1-3
Highway Hypnosis...........................................4-36
Hill and Mountain Roads..................................4-36
Hitches..........................................................4-59
HomeLink
®Transmitter....................................2-41
HomeLink®Transmitter, Programming................2-42
Hood
Checking Things Under................................5-10
Release.....................................................5-10
7

Maintenance Schedule (cont.)
Owner Checks and Services........................... 6-9
Recommended Fluids and Lubricants.............6-12
Scheduled Maintenance................................. 6-4
Using Your................................................... 6-3
Your Vehicle and the Environment................... 6-2
Maintenance When Trailer Towing.....................4-65
Making Turns.................................................4-62
Malfunction Indicator Light................................3-40
Matching Transmitter(s) to Your Vehicle............... 2-6
Memory Seat.................................................2-52
Message
DIC Warnings and Messages........................3-59
Mexico, Central America and Caribbean
Islands/Countries (Except Puerto Rico and
U.S. Virgin Islands)....................................... 7-5
Mirror Operation.............................................2-36
Mirrors
Automatic Dimming Rearview with OnStar
®
and Compass..........................................2-36
Outside Automatic Dimming Mirror with Curb
View Assist.............................................2-39
Outside Convex Mirror.................................2-39
Outside Heated Mirrors................................2-39
Outside Manual Mirrors................................2-38
Outside Power Mirrors..................................2-38
MyGMLink.com................................................ 7-3
N
Navigation/Radio System................................3-103
New Vehicle Break-In......................................2-19
Normal Maintenance Replacement Parts............6-14
O
Odometer......................................................3-34
Off-Road Recovery..........................................4-12
Oil
Change Engine Oil Light...............................3-45
Engine.......................................................5-16
Pressure Gage............................................3-44
OIL PRESSURE LOW/STOP ENGINE...............3-60
Older Children, Restraints................................1-29
Online Owner Center........................................ 7-3
OnStar
®Personal Calling.................................2-41
OnStar®Services............................................2-40
OnStar®System.............................................2-40
OnStar®Virtual Advisor....................................2-41
Operating Your All-Wheel-Drive Vehicle Off
Paved Roads..............................................4-15
Other Warning Devices...................................... 3-6
Outlet Adjustment...................................3-23, 3-27
10