2005 GMC ENVOY Owner's Manual

Defogging and Defrosting
Fog on the inside of windows is a result of high humidity
(moisture) condensing on the cool window glass. This
can be minimized if the climate control system is
used properly. You can use either defog or front defrost
to clear fog or frost from your windshield.
-(Defog):Use this setting to clear the windows of fog
or moisture. This setting will deliver air to the oor
and windshield outlets.
0(Defrost):Press the front defrost button to clear
the windshield and side windows of frost or fog quickly.
The system will automatically control the fan speed if
you select defrost from AUTO mode. If the outside
temperature is 40°F (4°C) or warmer, your air
conditioning compressor will automatically run to help
dehumidify the air and dry the windshield. Do not
drive the vehicle until all the windows are clear.
Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog from the rear window.
<(Rear):Press this button to turn the rear window
defogger on or off.
An indicator light in the button will come on to let you
know that the rear window defogger is activated.
The rear window defogger will turn off approximately
10 minutes after the button is pressed. If you need
additional warming time, press the button again.
If equipped, your heated mirrors will also come on when
you press this button.
Notice:Using a razor blade or sharp object to clear
the inside rear window may damage the rear
window defogger. Repairs would not be covered by
your warranty. Do not clear the inside of the rear
window with sharp objects.
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Outlet Adjustment
Use the air outlets located in the center and on the side
of your instrument panel to direct the airow.
Operation Tips

Keep the hood and front air inlets free of ice, snow,
or any other obstruction (such as leaves). The
heater and defroster will work far better, reducing
the chance of fogging the inside of your windows.
When you enter a vehicle in cold weather, turn the
fan knob all the way to the right for a few moments
before driving. This helps clear the intake ducts
of snow and moisture, and reduces the chance of
fogging the inside of your window.
Keep the air path under the front seats clear of
objects. This helps air to circulate throughout
your vehicle.
Adding outside equipment to the front of your
vehicle, such as hood-air deectors, may affect the
performance of the heating and air conditioning
system. Check with your dealer before adding
equipment to the outside of your vehicle.
Rear Climate Control System
Envoy
Your vehicle has one of the following rear climate
control systems. With any of these systems, the rear
climate controls will be disabled when the front climate
control system is in defrost. This occurs to provide
maximum airow to clear the windshield.
The rear mode and temperature positions now mimic
the front control system mode and passenger
side temperature.
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H(Panel):When panel mode is selected in the front
controller, the rear system will distribute air from the
four headliner outlets.
)(Bi-level):When bi-level mode is selected in the
front controller, the rear system will distribute air from the
four headliner outlets and the third seat oor outlet.
6(Floor):When oor mode is selected in the front
controller, the rear system will distribute air from the third
seat oor outlet.
The temperature of the air coming through the rear
outlets is determined by the front passenger’s
temperature setting. Press the PWR button to turn the
rear climate controls on and off. Use the mode knob
to change the direction of airow (upper, bi-level or oor)
to the rear seat area.
Envoy or Envoy Denali
If your vehicle has the rear seat audio system, the lower
buttons are used to adjust the rear seat climate control
system. The temperature of the air coming through the
rear outlets is determined by the front passenger’s
temperature setting.
z9y(Fan):Press this button to adjust
the fan speed.
z\y(Mode):Press this button to change the
direction of airow (panel, bi-level or oor) to the rear
seat area.
P(On/Off):Press this button to turn the rear climate
controls on or off.
The rear control will only turn on if the front is on and
not in defrost mode.
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Envoy XL
To operate the rear air conditioning system, the front air
conditioning system must be on. With the front air
conditioning system off, the rear system controls can
only be used to circulate air in the rear of the vehicle.
To adjust the airow speed,
turn the fan knob (driver
override switch), located on
the front center oor
console to 1, 2 or 3.
The rear mode and
temperature positions
now mimic the front
control system mode
and passenger
side temperature.
To activate the second row seat controls in the following
systems, set the fan knob, located on the front
console, to R.Turn the knobs on the control panel to choose a fan
speed, temperature and direction of airow.
H(Panel):Selecting panel mode will deliver air
to the four headliner outlets.
)(Bi-level):Selecting bi-level mode will deliver
warmer air to the third seat oor outlet and cooler air
to the headliner outlets.
6(Floor):Selecting oor mode will deliver air
to the oor outlet located in the third seat area.
Envoy XL
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Press the buttons at the bottom of the audio control
panel to adjust the fan speed, mode and temperature for
the rear passengers. The selections will be shown on
the display.
S9T(Fan):Press the rear fan control button with
the arrow pointing right to turn the rear climate
control on. Toggle this button to adjust the air ow
speed. To turn the rear system off, toggle the left arrow
until the display turns off.
z\y(Mode):Press this button to change the
direction of airow (panel, bi-level or oor) to the rear
seat area.
STEMPT(Temperature):Press this button to
increase and decrease the temperature setting.
Climate Controls Personalization
If your vehicle is equipped with the Driver Information
Center (DIC), you can store and recall the climate control
settings for temperature, air delivery mode and fan speed
for two different drivers. The personal choice settings
recalled are determined by the transmitter used to enter
the vehicle. After the button with the unlock symbol on a
remote keyless entry transmitter is pressed, the climate
control will adjust to the last settings of the identied
driver. The settings can also be changed by pressing one
of the memory buttons (1 or 2) located on the driver’s
door. When adjustments are made, the new settings are
automatically saved for the driver. Envoy XL
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Warning Lights, Gages, and
Indicators
This part describes the warning lights and gages that may
be on your vehicle. The pictures will help you locate them.
Warning lights and gages can signal that something is
wrong before it becomes serious enough to cause
an expensive repair or replacement. Paying attention to
your warning lights and gages could also save you
or others from injury.
Warning lights come on when there may be or is a
problem with one of your vehicle’s functions. As you will
see in the details on the next few pages, some
warning lights come on briey when you start the
engine just to let you know they’re working. If you are
familiar with this section, you should not be alarmed
when this happens.Gages can indicate when there may be or is a problem
with one of your vehicle’s functions. Often gages
and warning lights work together to let you know when
there’s a problem with your vehicle.
When one of the warning lights comes on and stays on
when you are driving, or when one of the gages
shows there may be a problem, check the section that
tells you what to do about it. Please follow this
manual’s advice.
Waiting to do repairs can be costly–and even
dangerous. So please get to know your warning lights
and gages. They’re a big help.
Your vehicle may also have a Driver Information Center
(DIC) that works along with the warning lights and
gages. SeeDriver Information Center (DIC) on
page 3-51.
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Instrument Panel Cluster
Your instrument panel cluster is designed to let you know at a glance how your vehicle is running. You’ll know how
fast you’re going, about how much fuel you’ve used, and many other thing you’ll need to know to drive safely
and economically.
United States version shown, Canada similar
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Speedometer and Odometer
Your speedometer lets you see your speed in both
miles per hour (mph) and kilometers per hour (km/h).
Your odometer shows how far your vehicle has
been driven, in either miles (used in the United States)
or kilometers (used in Canada).
The odometer mileage can be checked without the
vehicle running. Simply press the trip stem located on
the instrument panel cluster.
You may wonder what happens if your vehicle needs a
new odometer installed. The new one will be set to
the correct mileage total of the old odometer.
Trip Odometer
The trip odometer can tell you how far your vehicle has
been driven since you last set the trip odometer to zero.
Your vehicle’s odometer works together with the Driver
Information Center (DIC). You can set a Trip A and
Trip B odometer. See “Trip Information” underDIC
Operation and Displays on page 3-52.The odometer mileage can be checked without the
vehicle running. Simply press the trip stem on the
instrument panel cluster.
If your vehicle ever needs a new odometer installed, the
new one will be set to the correct mileage total of the
old odometer.
Tachometer
The tachometer displays
the engine speed in
revolutions per
minute (rpm).
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