2007 GMC ENVOY exhaust

Keys.............................................................. 95
Remote Keyless Entry (RKE) System.......... 97
Remote Keyless Entry (RKE)
System Operation.................................... 98
Doors and Locks........................................ 100
Door Locks................................................ 100
Power Door Locks..................................... 101
Delayed Locking........................................ 102
Programmable Automatic Door Locks........ 102
Rear Door Security Locks......................... 105
Lockout Protection..................................... 105
Liftgate/Liftglass......................................... 106
Windows...................................................... 107
Power Windows........................................ 108
Sun Visors................................................ 109
Theft-Deterrent Systems............................. 110
Content Theft-Deterrent............................. 110
Passlock
®.................................................. 111
Starting and Operating Your Vehicle......... 112
New Vehicle Break-In................................ 112
Ignition Positions....................................... 113
Retained Accessory Power (RAP)............. 114Starting the Engine.................................... 114
Adjustable Throttle and Brake Pedal.......... 116
Engine Coolant Heater.............................. 116
Active Fuel Management™........................ 117
Automatic Transmission Operation............. 118
Four-Wheel Drive...................................... 122
Parking Brake........................................... 126
Shifting Into Park (P) ................................. 127
Shifting Out of Park (P)............................. 129
Parking Over Things That Burn................. 130
Engine Exhaust......................................... 131
Running the Engine While Parked............. 132
Mirrors......................................................... 133
Manual Rearview Mirror............................. 133
Manual Rearview Mirror with OnStar
®....... 133
Automatic Dimming Rearview Mirror
with OnStar
®and Compass................... 134
Automatic Dimming Rearview Mirror
with OnStar
®, Compass and
Temperature Display.............................. 136
Automatic Dimming Rearview Mirror
with Compass........................................ 138
Section 2 Features and Controls
93

Liftgate/Liftglass
{CAUTION:
It can be dangerous to drive with the
liftgate or liftglass open because carbon
monoxide (CO) gas can come into your
vehicle. You cannot see or smell CO.
It can cause unconsciousness and even
death. If you must drive with the liftgate
open or if electrical wiring or other cable
connections must pass through the seal
between the body and the liftgate or
liftglass:
Make sure all other windows are shut.
Turn the fan on your climate control
system to its highest speed and select
the control setting that will force
outside air into your vehicle. See
“Climate Control System” in the Index.
If you have air outlets on or under the
instrument panel, open them all the
way. SeeEngine Exhaust on page 131.
Liftgate Release
To unlock the liftgate, use the power door lock
switch or the remote keyless entry transmitter.
SeeRemote Keyless Entry (RKE) System
Operation on page 98. The liftglass will also unlock
when the liftgate is unlocked.
Press the button on the liftglass to open it.
To open the entire liftgate, lift the handle located
in the center of the liftgate. When the liftgate
is opened, the liftglass will lock after a short delay.
Emergency Release for Opening
Liftgate
1. Remove the trim plug, located on the inside of
the liftgate in the center, to expose the access
hole in the trim panel.
2. Use a tool to reach through the access hole in
the trim panel.
3. Pry the left release lever up to the unlock
position. Pry the right release lever up to
unlatch the liftgate.
4. Reinstall the trim plug.
106

Parking Over Things That Burn
{CAUTION:
Things that can burn could touch hot
exhaust parts under your vehicle and
ignite. Do not park over papers, leaves,
dry grass, or other things that can burn.
130

Engine Exhaust
{CAUTION:
Engine exhaust can kill. It contains the
gas carbon monoxide (CO), which you
cannot see or smell. It can cause
unconsciousness and death.
You might have exhaust coming in if:
Your exhaust system sounds strange
or different.
Your vehicle gets rusty underneath.
Your vehicle was damaged in a
collision.
CAUTION: (Continued)
CAUTION: (Continued)

Your vehicle was damaged when
driving over high points on the road
or over road debris.
Repairs were not done correctly.
Your vehicle or exhaust system has
been modied improperly.
If you ever suspect exhaust is coming into
your vehicle:
Drive it only with all the windows
down to blow out any CO; and
Have your vehicle xed immediately.
131

Running the Engine While Parked
It is better not to park with the engine running. But if
you ever have to, here are some things to know.
{CAUTION:
Idling the engine with the climate control
system off could allow dangerous exhaust
into your vehicle. See the earlier caution
underEngine Exhaust on page 131.
Also, idling in a closed-in place can let
deadly carbon monoxide (CO) into your
vehicle even if the climate control fan is at
the highest setting. One place this can
happen is a garage. Exhaust — with
CO — can come in easily. NEVER park in
a garage with the engine running.
Another closed-in place can be a blizzard.
SeeWinter Driving on page 344.
{CAUTION:
It can be dangerous to get out of your
vehicle if the shift lever is not fully in
PARK (P) with the parking brake rmly
set. Your vehicle can roll. Do not leave
your vehicle when the engine is running
unless you have to. If you have left the
engine running, the vehicle can move
suddenly. You or others could be injured.
To be sure your vehicle will not move,
even when you are on fairly level ground,
always set your parking brake and move
the shift lever to PARK (P).
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Malfunction Indicator Lamp
Check Engine Light
Your vehicle has a
computer which
monitors operation of
the fuel, ignition, and
emission control
systems.
This system is called OBD II (On-Board
Diagnostics-Second Generation) and is intended
to assure that emissions are at acceptable
levels for the life of the vehicle, helping to produce
a cleaner environment. The check engine light
comes on to indicate that there is a problem and
service is required. Malfunctions often will be
indicated by the system before any problem is
apparent. This may prevent more serious damage
to your vehicle. This system is also designed to
assist your service technician in correctly
diagnosing any malfunction.Notice:If you keep driving your vehicle
with this light on, after awhile, your emission
controls may not work as well, your fuel
economy may not be as good, and your engine
may not run as smoothly. This could lead to
costly repairs that may not be covered by your
warranty.
Notice:Modications made to the engine,
transmission, exhaust, intake, or fuel system
of your vehicle or the replacement of the
original tires with other than those of the same
Tire Performance Criteria (TPC) can affect
your vehicle’s emission controls and may
cause this light to come on. Modications to
these systems could lead to costly repairs not
covered by your warranty. This may also
result in a failure to pass a required Emission
Inspection/Maintenance test. SeeAccessories
and Modifications on page 380.
210

Environmental Concerns
Off-road driving can provide wholesome and
satisfying recreation. However, it also raises
environmental concerns. We recognize these
concerns and urge every off-roader to follow these
basic rules for protecting the environment:
Always use established trails, roads, and areas
that have been specially set aside for public
off-road recreational driving; obey all
posted regulations.
Avoid any driving practice that could damage
the environment — shrubs, owers, trees,
grasses — or disturb wildlife. This includes
wheel-spinning, breaking down trees, or
unnecessary driving through streams or over
soft ground.
Always carry a litter bag — make sure all
refuse is removed from any campsite
before leaving.
Take extreme care with open res where
permitted, camp stoves, and lanterns.
Never park your vehicle over dry grass or
other combustible materials that could
catch re from the heat of the vehicle’s
exhaust system.
Traveling to Remote Areas
It makes sense to plan your trip, especially when
going to a remote area. Know the terrain and plan
your route. You are much less likely to get bad
surprises. Get accurate maps of trails and terrain.
Try to learn of any blocked or closed roads.
It is also a good idea to travel with at least
one other vehicle. If something happens to one of
them, the other can help quickly.
Does your vehicle have a winch? If so, be sure to
read the winch instructions. In a remote area, a
winch can be handy if you get stuck. But you will
want to know how to use it properly.
Getting Familiar with Off-Road Driving
It is a good idea to practice in an area that is
safe and close to home before you go into
the wilderness. Off-road driving does require some
new and different skills. Here is what we mean.
Tune your senses to different kinds of signals.
Your eyes, for example, need to constantly sweep
the terrain for unexpected obstacles. Your ears
need to listen for unusual tire or engine sounds.
With your arms, hands, feet, and body, you will
need to respond to vibrations and vehicle bounce.
321

Driving in Mud, Sand, Snow, or Ice
When you drive in mud, snow, or sand, the wheels
will not get good traction. You cannot accelerate
as quickly, turning is more difficult, and you
will need longer braking distances.
It is best to use a low gear when you are in
mud —the deeper the mud, the lower the gear.
In really deep mud, the idea is to keep your vehicle
moving so you do not get stuck.
When you drive on sand, you will sense a change
in wheel traction. But it will depend upon how
loosely packed the sand is. On loosely packed
sand, such as on beaches or sand dunes, the tires
will tend to sink into the sand. This has an effect
on steering, accelerating, and braking. Drive
at a reduced speed and avoid sharp turns
or abrupt maneuvers.
Hard packed snow and ice offer the worst tire
traction. On these surfaces, it is very easy to lose
control. On wet ice, for example, the traction is so
poor that you will have difficulty accelerating. And if
you do get moving, poor steering and difficult
braking can cause you to slide out of control.{CAUTION:
Driving on frozen lakes, ponds, or rivers
can be dangerous. Underwater springs,
currents under the ice, or sudden thaws
can weaken the ice. Your vehicle could
fall through the ice and you and your
passengers could drown. Drive your
vehicle on safe surfaces only.
Driving in Water
Heavy rain can mean ash ooding, and ood
waters demand extreme caution.
Find out how deep the water is before you drive
through it. If it is deep enough to cover the wheel
hubs, axles, or exhaust pipe, do not try it — you
probably will not get through. Also, water that deep
can damage the axle and other vehicle parts.
332