fuel cap GMC ENVOY 2007 User Guide

6. Start the engine and let it run until you can
feel the upper radiator hose getting hot.
Watch out for the engine cooling fan.
7. By this time, the coolant level inside the
radiator ller neck may be lower. If the level is
lower, add more of the proper DEX-COOL
®
coolant mixture through the ller neck until the
level reaches the base of the ller neck.8. Then replace the pressure cap. At any time
during this procedure if coolant begins to ow
out of the ller neck, reinstall the pressure
cap. Be sure the pressure cap is hand-tight
and fully seated.
Engine Fan Noise
Your vehicle has a clutched engine cooling fan.
When the clutch is engaged, the fan spins faster to
provide more air to cool the engine. In most
everyday driving conditions the clutch is not
engaged. This improves fuel economy and reduces
fan noise. Under heavy vehicle loading, trailer
towing, and/or high outside temperatures, the fan
speed increases when the clutch engages so
you may hear an increase in fan noise. This is
normal and should not be mistaken as the
transmission slipping or making extra shifts. It is
merely the cooling system functioning properly.
The fan will slow down when additional cooling is
not required and the clutch disengages.
You may also hear this fan noise when you start
the engine. It will go away as the fan clutch
disengages.
416

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/
transaxle, power steering, power brakes, power
windows, power seats, and air conditioning.
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 Tire 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 447.
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 (DOT)
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. See
Loading Your Vehicle on page 349.
GAWR FRT:Gross Axle Weight Rating for the
front axle. SeeLoading Your Vehicle on page 349.
GAWR RR:Gross Axle Weight Rating for the
rear axle. SeeLoading Your Vehicle on page 349.
444

Ination - Tire Pressure
Tires need the correct amount of air pressure to
operate effectively.
Notice:Do not let anyone tell you that
under-ination or over-ination is all right.
It is not. If your tires do not have enough air
(under-ination), you can get the following:
Too much exing
Too much heat
Tire overloading
Premature or irregular wear
Poor handling
Reduced fuel economy
If your tires have too much air (over-ination),
you can get the following:
Unusual wear
Poor handling
Rough ride
Needless damage from road hazardsA Tire and Loading Information label is attached to
the vehicle’s center pillar (B-pillar), below the
driver’s door latch. This label shows your vehicle’s
original equipment tires and the correct ination
pressures for your tires when they are cold.
The recommended cold tire ination pressure,
shown on the label, is the minimum amount of
air pressure needed to support your vehicle’s
maximum load carrying capacity.
For additional information regarding how much
weight your vehicle can carry, and an example
of the tire and loading information label, see
Loading Your Vehicle on page 349. How you load
your vehicle affects vehicle handling and ride
comfort, never load your vehicle with more weight
than it was designed to carry.
When to Check
Check your tires once a month or more.
Also, check the tire pressure of the spare tire.
447

Capacities and Specications
The following approximate capacities are given in English and metric conversions. SeeRecommended
Fluids and Lubricants on page 517for more information.
ApplicationCapacities
English Metric
Air Conditioning Refrigerant R134aFor the air conditioning system refrigerant charge
amount, see the refrigerant caution label located
under the hood. See your dealer for more information.
Cooling System
4.2L L6 10.8 qt 10.2 L
5.3L V8 12.2 qt 11.6 L
Engine Oil with Filter
4.2L L6 7.0 qt 6.6 L
5.3L V8 6.0 qt 5.7 L
Fuel Tank 22.0 gal 83.3 L
Transfer Case Lubricant 2.0 qt 1.8 L
Transmission (Drain and Rell) 5.0 qt 4.7 L
Wheel Nut Torque 100 lb ft
140Y
All capacities are approximate. When adding, be sure to ll to the appropriate level, as recommended in this manual.
Recheck the uid level after lling.
Engine Specications
Engine VIN Code Transmission Spark Plug Gap
4.2L L6 S Automatic 0.040 inches (1.01 mm)
5.3L V8 M Automatic 0.040 inches (1.01 mm)
502

(e)Make sure the safety belt reminder light and all
your belts, buckles, latch plates, retractors, and
anchorages 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. Also
look for any opened or broken airbag coverings,
and have them repaired or replaced. The
airbag system does not need regular maintenance.
(f)Lubricate all key lock cylinders, hood latch
assembly, secondary latch, pivots, spring anchor,
release pawl, rear compartment hinges, outer
liftgate handle pivot points, rear door detent link,
roller mechanism, liftgate handle pivot points, latch
bolt, fuel door hinge, cargo door hinge, locks,
and folding seat hardware. More frequent
lubrication may be required when exposed to a
corrosive environment. Applying silicone grease on
weatherstrips with a clean cloth will make them
last longer, seal better, and not stick or squeak.
(g)Inspect hoses for cracks, chang, leaks, kinks,
and proper installation.(h)Change automatic transmission uid and lter
if the vehicle is mainly driven under one or
more of these conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C)
or higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police, or delivery
service.
(i)Drain, ush, and rell cooling system. This
service can be complex; you should have
your dealer perform this service. See Engine
Coolant on page 405 for what to use. Inspect
hoses. Clean radiator, condenser, pressure cap,
and ller neck. Pressure test the cooling
system and pressure cap.
(j)A uid loss in any vehicle system could indicate
a problem. Have the system inspected and
repaired and the uid level checked. Add uid if
needed.
512

C
Calibration........................134, 136, 138, 140
California Fuel............................................. 383
California Proposition 65 Warning................ 381
Canadian Owners........................................... 3
Capacities and Specications...................... 502
Carbon Monoxide..............106, 131, 344, 362
Care of
Safety Belts............................................. 485
Your CD and DVD Player........................ 299
Your CDs and DVDs................................ 299
Cargo Cover............................................... 163
Cargo Tie Downs........................................ 164
CD, MP3 ..................................................... 271
Center Console Storage Area...................... 160
Chains, Tire................................................. 461
Charging System Light................................ 205
Check
Engine Light............................................ 210
Gages Warning Light............................... 216
Check Gas Cap Light.................................. 217
Checking Things Under the Hood................ 388
Chemical Paint Spotting.............................. 489Child Restraints
Child Restraint Systems............................. 49
Infants and Young Children........................ 45
Lower Anchors and Tethers for Children..... 56
Older Children........................................... 42
Securing a Child Restraint in a Rear
Outside Seat Position............................. 63
Securing a Child Restraint in the Center
Rear Seat Position................................. 66
Securing a Child Restraint in the Right
Front Seat Position................................. 66
Where to Put the Restraint........................ 54
Chime Level Adjustment .............................. 300
Cigarette Lighter.......................................... 186
Cleaning
Aluminum Wheels.................................... 488
Exterior Lamps/Lenses............................. 486
Fabric/Carpet........................................... 483
Finish Care.............................................. 486
Inside of Your Vehicle .............................. 482
Instrument Panel, Vinyl, and Other Plastic
Surfaces............................................... 485
Leather.................................................... 484
Tires........................................................ 488
Underbody Maintenance........................... 489
Washing Your Vehicle .............................. 486
549

Engine (cont.)
Drive Belt Routing.................................... 520
Engine Compartment Overview................ 390
Exhaust................................................... 131
Fan Noise................................................ 416
Oil ........................................................... 394
Oil Life System........................................ 398
Overheating............................................. 408
Reduced Power Light............................... 215
Starting.................................................... 114
Entry Lighting.............................................. 183
Event Data Recorders (EDR)...................... 538
Exit Lighting................................................ 183
Extender, Safety Belt..................................... 41
F
Filter
Engine Air Cleaner................................... 400
Finish Damage............................................ 489
Fixed Mast Antenna.................................... 299
Flashers, Hazard Warning........................... 170
Flash-to-Pass.............................................. 173
Flat Tire...................................................... 464
Flat Tire, Changing...................................... 465Flat Tire, Storing......................................... 478
Fluid
Automatic Transmission............................ 401
Power Steering........................................ 417
Windshield Washer.................................. 418
Fog Lamps.................................................. 182
Four-Wheel Drive...............................122, 428
Front Axle................................................... 429
Fuel............................................................ 382
Additives.................................................. 383
California Fuel.......................................... 383
Check Gas Cap Light.............................. 217
Filling a Portable Fuel Container.............. 387
Filling Your Tank...................................... 385
Fuels in Foreign Countries....................... 384
Gage....................................................... 217
Gasoline Octane...................................... 382
Gasoline Specications............................ 383
Low Warning Light................................... 217
Fuses
Engine Compartment Fuse Block............. 493
Fuses and Circuit Breakers...................... 493
Rear Underseat Fuse Block..................... 499
Windshield Wiper..................................... 492
552

I
Ignition Positions......................................... 113
Infants and Young Children, Restraints.......... 45
Ination - Tire Pressure............................... 447
Instrument Panel
Overview.................................................. 168
Instrument Panel (I/P)
Brightness................................................ 182
Cluster..................................................... 198
J
Jump Starting.............................................. 423
K
Keyless Entry System................................... 97
Keys............................................................. 95
L
Labeling, Tire Sidewall................................. 440
Lamps
Battery Run-Down Protection................... 185
Dome....................................................... 182
Dome Lamp Override............................... 183Lamps (cont.)
Electric Power Management..................... 184
Fog .......................................................... 182
Reading................................................... 183
LATCH System
Child Restraints......................................... 56
License Plate Lamps................................... 435
Liftgate/Liftglass........................................... 106
Liftglass/Liftgate........................................... 106
Light
Airbag Readiness..................................... 201
Anti-Lock Brake System Warning............. 207
Brake System Warning............................. 206
Change Engine Oil................................... 214
Charging System..................................... 205
Check Gages Warning............................. 216
Check Gas Cap....................................... 217
Cruise Control.......................................... 215
Gate Ajar................................................. 216
Highbeam On.......................................... 215
Low Fuel Warning.................................... 217
Malfunction Indicator................................ 210
Passenger Airbag Status Indicator............ 202
Passenger Safety Belt Reminder.............. 200
Reduced Engine Power............................ 215
Safety Belt Reminder............................... 200
Security................................................... 214
554