GMC ENVOY DENALI 2007 Owners Manual

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).
132

{CAUTION:
If your vehicle has four-wheel drive, it will
be free to roll — even if the shift lever is
in PARK (P) — if the transfer case is in
NEUTRAL. So be sure the transfer case is
in a drive gear — not in NEUTRAL. See
Four-Wheel Drive on page 122.
Follow the proper steps to be sure your vehicle
will not move. SeeShifting Into Park (P) on
page 127.
If you are pulling a trailer, seeTowing a Trailer on
page 362.
Mirrors
Manual Rearview Mirror
Your vehicle may have this feature. While sitting in
a comfortable driving position, adjust the rearview
mirror so you can see clearly behind your
vehicle. Grip the mirror in the center to move it up
or down and side to side. The day/night control,
located at the bottom of the mirror, adjusts
the mirror to reduce headlamp glare from behind
during evening or dark conditions. Turn the
control clockwise for night use; return it to the
center for daytime use.
Manual Rearview Mirror with
OnStar
®
Your vehicle may have a rearview mirror with the
OnStar®system.
Control buttons for the OnStar
®system are at the
bottom of the mirror. See your dealer for more
information on the OnStar
®system and how
to subscribe to OnStar®. Also, seeOnStar®
System on page 145for more information about
the services OnStar®provides.
133

Mirror Operation
While sitting in a comfortable driving position,
adjust the rearview mirror so you can see clearly
behind your vehicle. Grip it in the center to
move it up or down and side to side. The day/night
control, located at the bottom of the mirror,
adjusts the mirror to reduce headlamp glare from
behind during evening or dark conditions.
Move the control to the right for night conditions.
Return it to the center for daytime use.
Automatic Dimming Rearview Mirror
with OnStar
®and Compass
Your vehicle may have an automatic-dimming
rearview mirror with a compass and the OnStar®
system.
There are three additional buttons for the OnStar
®
system. See your dealer for more information
on the system and how to subscribe to OnStar®.
SeeOnStar®System on page 145for more
information about the services OnStar®provides.
O(On/Off):This is the on/off button.
Automatic Dimming Mirror Operation
The automatic dimming mirror function is turned on
automatically each time the ignition is started.
To operate the automatic dimming mirror, do the
following:
1. Make sure the green indicator light, located to
the left of the on/off button, is lit. If it’s not,
press and hold the on/off button until the green
light comes on, indicating that the mirror is
in automatic dimming mode.
2. Turn off the automatic dimming mirror function
by pressing and holding the on/off button until
the green indicator light turns off.
Compass Operation
Press the on/off button once to turn the compass
on or off.
There is a compass display in the window in the
upper right corner of the mirror face. The compass
displays a maximum of two characters. For
example, “NE” is displayed for north-east.
134

Compass Calibration
Press and hold the on/off button to activate the
compass calibration mode. CAL will be displayed
in the compass window on the mirror.
The compass can be calibrated by driving the
vehicle in circles at 5 mph (8 km/h) or less until the
display reads a direction.
Compass Variance
Compass variance is the difference between
earth’s magnetic north and true geographic north.
The mirror is set to zone eight upon leaving
the factory. It will be necessary to adjust the
compass to compensate for compass variance if
you live outside zone eight. Under certain
circumstances, such as during a long distance
cross-country trip, it will be necessary to adjust for
compass variance. If not adjusted to account
for compass variance, your compass could give
false readings.
To adjust for compass variance, do the following:
1. Find your current location and variance
zone number on the following zone map.2. Press and hold the on/off button for
six seconds. Release the button when
(FOR ZONE) is displayed. The number shown
is the current zone number.
3. Scroll through the zone numbers that appear in
the window on the mirror by pressing the on/off
button. Once you nd your zone number,
release the button. After about four seconds,
the mirror will return to the compass display,
and the new zone number will be set.
135

Automatic Dimming Rearview Mirror
with OnStar
®, Compass and
Temperature Display
Your vehicle may have this feature. When on, an
automatic dimming mirror automatically dims
to the proper level to minimize glare from lights
behind you after dark.
The mirror also includes a dual display in the
upper right corner of the mirror face. The compass
reading and the outside temperature will both
appear in the display at the same time.
P(On/Off):This is the on/off button.
Automatic Dimming Mirror Operation
The automatic dimming mirror function is turned on
automatically each time the ignition is started.
To operate the automatic dimming mirror, do the
following:
1. Make sure the green indicator light, located to
the left of the on/off button, is lit. If it’s not,
press and hold the on/off button until the green
light comes on, indicating that the mirror is
in automatic dimming mode.2. Turn off the automatic dimming mirror function
by pressing and holding the on/off button until
the green indicator light turns off.
Temperature and Compass Display
Press the on/off button, located to the far
left, briey to turn the compass/temperature
display on or off.
If the display reads CAL, you will need to calibrate
the compass. For more information on calibration,
see below.
To adjust between Fahrenheit and Celsius, do the
following:
1. Press and hold the on/off button until either a
ashing F or C appears.
2. Press the button again to change the display
to the desired unit of measurement. After
approximately four seconds of inactivity, the
new unit will be locked in and the display
will return.
If an abnormal temperature reading is displayed
for an extended period of time, please consult your
dealer. Under certain circumstances, a delay in
updating the temperature is normal.
136

Compass Variance
The mirror is set in zone eight upon leaving the
factory. It will be necessary to adjust the compass
to compensate for compass variance if you live
outside of zone eight. Under certain
circumstances, as during a long distance
cross-country trip, it will be necessary to adjust for
compass variance. Compass variance is the
difference between earth’s magnetic north and true
geographic north. If not adjusted to account for
compass variance, your compass could give false
readings.
To adjust for compass variance, do the following:
1. Find your current location and variance
zone number on the following zone map.
2. Press and hold the on/off button untilaZand
a zone number appear in the display. The
compass is now in zone mode.
3. Keep pressing the on/off button until the
desired zone number appears in the
display. Release the button. After
approximately four seconds of inactivity, the
new zone number will be locked in and
the compass/temperature display will return.
4. Calibrate the compass as described next.
137

Compass Calibration
The compass may need calibration if one of the
following occurs:
After approximately ve seconds, the display
does not show a compass heading (N for
North, for example), there may be a strong
magnetic eld interfering with the compass.
Such interference may be caused by a
magnetic antenna mount, magnetic note pad
holder or a similar magnetic item.
The compass does not display the correct
heading and the compass zone variance
is set correctly.
In order to calibrate, CAL must be displayed in the
mirror compass windows. If CAL is not displayed,
press and hold the on/off button until CAL is
displayed.
The compass can be calibrated by driving the
vehicle in circles at 5 mph (8 km/h) or less until the
display reads a direction.
Passenger Airbag Indicator
The vehicle may be equipped with a passenger
airbag indicator, on the mirror glass, just above the
buttons. If the vehicle has this feature, the
mirror will display the word ON, or an airbag
symbol in Canada, when the passenger airbag is
enabled. For more information, seePassenger
Sensing System on page 82.
Cleaning the Mirror
When cleaning the mirror, use a paper towel or
similar material dampened with glass cleaner.
Do not spray glass cleaner directly on the mirror
as that may cause the liquid cleaner to enter
the mirror housing.
Automatic Dimming Rearview Mirror
with Compass
Your vehicle may have an automatic-dimming
rearview mirror with a compass.
O(On/Off):This is the on/off button for the
automatic dimming feature and compass.
138

Automatic Dimming Mirror Operation
The automatic dimming mirror function is turned on
automatically each time the ignition is started.
To operate the automatic dimming mirror, do the
following:
1. Make sure the green indicator light, located to
the left of the on/off button, is lit. If it’s not,
press and hold the on/off button until the green
light comes on, indicating that the mirror is
in automatic dimming mode.
2. Turn off the automatic dimming mirror function
by pressing and holding the on/off button until
the green indicator light turns off.
Compass Operation
Press the on/off button once to turn the compass
on or off.
There is a compass display in the window in the
upper right corner of the mirror face. The compass
displays a maximum of two characters. For
example, “NE” is displayed for north-east.
Compass Calibration
Press and hold the on/off button to activate the
compass calibration mode. CAL will be displayed
in the compass window on the mirror.
The compass can be calibrated by driving the
vehicle in circles at 5 mph (8 km/h) or less until the
display reads a direction.
Compass Variance
Compass variance is the difference between
earth’s magnetic north and true geographic north.
The mirror is set to zone eight upon leaving
the factory. It will be necessary to adjust the
compass to compensate for compass variance if
you live outside zone eight. Under certain
circumstances, such as during a long distance
cross-country trip, it will be necessary to adjust for
compass variance. If not adjusted to account
for compass variance, your compass could give
false readings.
139

To adjust for compass variance, do the following:
1. Find your current location and variance
zone number on the following zone map.
2. Press and hold the on/off button for
six seconds. Release the button when
(FOR ZONE) is displayed. The number shown
is the current zone number.3. Scroll through the zone numbers that appear in
the window on the mirror by pressing the on/off
button. Once you nd your zone number,
release the button. After about four seconds,
the mirror will return to the compass display,
and the new zone number will be set.
Automatic Dimming Rearview
Mirror with Compass and
Temperature Display
If the vehicle is equipped with an automatic mirror, it
will, when on, automatically dim to the proper level
to minimize glare from lights behind you after dark.
The mirror also includes a display in the upper
right corner of the mirror face. The compass
reading and the outside temperature will both
appear in the display at the same time. The dual
display can be turned on or off by briey
pressing either the TEMP or the COMP button.
140