2007 GMC ENVOY fuel pressure

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

When a low tire pressure condition is detected,
the TPMS will illuminate the low tire pressure
warning symbol located on the instrument panel
cluster, and at the same time a message will also
appear on the DIC display. The low tire pressure
warning symbol on the instrument panel cluster
and the CHECK TIRE PRESSURE warning
message on the DIC will appear at each ignition
cycle until the tires are inated to the correct
ination pressure. For additional information and
details about the DIC operation and displays
seeDIC Operation and Displays on page 219and
DIC Warnings and Messages on page 222.
You may notice, during cooler weather conditions,
that the tire pressure monitor light, located on
the instrument panel cluster, and the CHECK TIRE
PRESSURE message will appear when the
vehicle is rst started, and then turn off as you
start to drive the vehicle. This could be an
early indicator that the tire pressures are getting
low and need to be inated to the proper pressure.
Each tire, including the spare (if provided),
should be checked monthly when cold and inated
to the ination pressure recommended by the
vehicle manufacturer on the vehicle placard or tire
ination pressure label.(If your vehicle has tires of a different size than the
size indicated on the vehicle placard or tire ination
pressure label, you should determine the proper tire
ination pressure for those tires.)
As an added safety
feature, your vehicle
has been equipped with
a tire pressure
monitoring system
(TPMS) that illuminates
a low tire pressure
telltale when one
or more of your tires
is signicantly
under-inated.
Accordingly, when the low tire pressure telltale
illuminates, you should stop and check your tires
as soon as possible, and inate them to the
proper pressure. Driving on a signicantly
under-inated tire causes the tire to overheat and
can lead to tire failure. Under-ination also
reduces fuel efficiency and tire tread life, and may
affect the vehicle’s handling and stopping ability.
449

(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

G
Gage
Check Gages Warning Light..................... 216
Engine Coolant Temperature.................... 208
Fuel......................................................... 217
Oil Pressure............................................. 213
Speedometer........................................... 199
Tachometer.............................................. 199
Voltmeter Gage........................................ 205
Garage Door Opener..........................149, 150
Gasoline
Octane..................................................... 382
Specications........................................... 383
Gate Ajar Light............................................ 216
Glove Box................................................... 160
GM Mobility Reimbursement Program.......... 531
H
Hazard Warning Flashers............................ 170
Head Restraints............................................ 17
Headlamps.........................................179, 431
Automatic Headlamp System.................... 181
Bulb Replacement.................................... 430
Daytime Running Lamps.......................... 180Headlamps (cont.)
Electrical System..................................... 492
Flash-to-Pass........................................... 173
Front Turn Signal, Sidemarker and
Parking Lamps..................................... 432
Halogen Bulbs......................................... 430
High/Low Beam Changer......................... 173
On Reminder........................................... 180
Washer.................................................... 175
Heated Seats................................................ 11
Heater......................................................... 186
Heater......................................................... 189
Highbeam On Light..................................... 215
Highway Hypnosis....................................... 341
Hill and Mountain Roads............................. 342
Hood
Checking Things Under............................ 388
Release................................................... 388
Horn............................................................ 170
How to Use This Manual ................................ 4
How to Wear Safety Belts Properly............... 26
553

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

Light (cont.)
Service Four-Wheel-Drive
Warning Light....................................... 216
StabiliTrak
®Indicator................................ 208
StabiliTrak®Service.................................. 207
Tire Pressure........................................... 209
Lighting
Entry........................................................ 183
Exit.......................................................... 183
Loading Your Vehicle................................... 349
Locking Rear Axle....................................... 309
Lockout Protection....................................... 105
Locks
Delayed Locking...................................... 102
Door........................................................ 100
Lockout Protection................................... 105
Power Door............................................. 101
Programmable Automatic Door Locks....... 102
Rear Door Security Locks........................ 105
Loss of Control........................................... 318
Low Fuel Warning Light............................... 217
Luggage Carrier.......................................... 161
Lumbar
Manual Controls......................................... 10
Power Controls.......................................... 10
M
Maintenance Schedule
Additional Required Services.................... 510
At Each Fuel Fill...................................... 513
At Least Once a Month............................ 514
At Least Once a Year .............................. 514
Introduction.............................................. 504
Maintenance Footnotes............................ 511
Maintenance Record................................ 521
Maintenance Requirements...................... 504
Normal Maintenance
Replacement Parts............................... 519
Owner Checks and Services.................... 513
Recommended Fluids and Lubricants....... 517
Scheduled Maintenance........................... 507
Using....................................................... 505
Your Vehicle and the Environment............ 505
Malfunction Indicator Light........................... 210
Manual Lumbar Controls............................... 10
Manual Seats.................................................. 8
Memory Seat, Mirrors, and Pedals................ 12
Message
DIC Warnings and Messages................... 222
555