Page 97 of 442

Leaving Your Vehicle With the
Engine Running
{CAUTION:
It can be dangerous to leave your vehicle with
the engine running. Your vehicle could move
suddenly if the shift lever is not fully in
PARK (P) with the parking brake rmly set.
And, if you leave the vehicle with the engine
running, it could overheat and even catch re.
You or others could be injured. Do not leave
your vehicle with the engine running.
If you have to leave your vehicle with the engine
running, be sure your vehicle is in PARK (P) and your
parking brake is rmly set before you leave it. After you
have moved the shift lever into PARK (P), hold the
regular brake pedal down. Then, see if you can move
the shift lever away from PARK (P) without rst pushing
the button on the shift lever. If you can, it means that
the shift lever was not fully locked into PARK (P).
Torque Lock
If you are parking on a hill and you do not shift your
transmission into PARK (P) properly, the weight of the
vehicle may put too much force on the parking pawl
in the transmission. You may nd it difficult to pull the
shift lever out of PARK (P). This is called “torque
lock.” To prevent torque lock, set the parking brake and
then shift into PARK (P) properly before you leave
the driver’s seat. To nd out how, see “Shifting
Into PARK (P)” listed previously.
If torque lock does occur, you may need to have
another vehicle push yours a little uphill to take some of
the pressure from the parking pawl in the transmission,
so you can pull the shift lever out of PARK (P).
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Page 98 of 442

Shifting Out of Park (P)
Your vehicle has an automatic transmission shift lock
control system. You have to fully apply your regular
brakes before you can shift from PARK (P) when the
ignition is in ON. SeeAutomatic Transmission Operation
on page 2-25for more information.
If you cannot shift out of PARK (P), ease the pressure
on the shift lever. Push the shift lever all the way
into PARK (P) while pushing the button on the shift lever
as you maintain brake application. Then move the
shift lever into the gear you want. If you ever hold the
pedal down but still cannot shift out of PARK (P), try the
following:
1. Turn the ignition key to ACCESSORY. Open and
close the driver’s door to turn off the RAP feature.
2. Apply and hold the brake until the end of Step 4.
3. Shift to NEUTRAL (N).
4. Start the vehicle and then shift to the drive gear
you want.
5. Have the vehicle xed as soon as you can.
Shift Lock Release
If your vehicle has a dead battery or a battery with low
voltage, you can still shift the vehicle into PARK (P)
and remove the ignition key. Use the following
procedure to release the shift lever:
1. Use a tool to remove
the cap with the lock
symbol located
next to the shift lever.
2. Using a narrow, pointed tool, press down on the
mechanism under the cap so that you can move
the shift lever.
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Page 99 of 442
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.
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.
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 had been
modi ed 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.
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Page 100 of 442

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 under
Engine Exhaust on page 2-33.
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. See
Winter Driving on page 4-39.
{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).
Follow the proper steps to be sure your vehicle will not
move. SeeShifting Into Park (P) on page 2-30.
If you are pulling a trailer, seeTowing a Trailer on
page 4-52.
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Page 101 of 442

Mirrors
Automatic Dimming Rearview Mirror
with OnStar
®
The vehicle may have an automatic dimming inside
rearview mirror with OnStar®controls. For more
information about OnStar®, seeOnStar®System on
page 2-40.
O(On/Off):The on/off button, located on the lower
left side of the mirror, is used for the automatic dimming
functions of the rearview mirror.
Mirror Operation
The automatic dimming feature comes on each time the
vehicle is started. Automatic dimming reduces the
glare of lights from behind the vehicle.
To turn the automatic dimming feature on or off, press
and release the on/off button. The indicator light will
illuminate when this feature is on.
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 OnStar
®and Compass
The vehicle may have an automatic dimming inside
rearview mirror with a compass and OnStar®controls.
For more information about OnStar®, seeOnStar®
System on page 2-40.
The mirror has an eight-point compass display in the
upper right corner of the mirror. When on, the compass
automatically calibrates, or sets the driving direction,
as the vehicle is driven. If the vehicle has the navigation
option, the direction the vehicle is facing will be
displayed on the navigation screen.
Y(On/Off):The on/off button is located on the lower
left side of the mirror and is used for the automatic
dimming and compass functions of the rearview mirror.
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Mirror Operation
The automatic dimming feature comes on each time the
vehicle is started.
To turn the automatic dimming feature on or off, press
the on/off button. The indicator light will illuminate
when this feature is on.
Compass Operation
Press the on/off button twice to turn the compass on
or off.
When the ignition and the compass feature are on, the
compass will show two character boxes for
approximately two seconds. After two seconds, the
mirror will display the current compass direction.
Compass Calibration
If after two seconds the display does not show a
compass direction, (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, note pad holder, or similar object. If the
letter C appears in the compass window, the compass
may need to be reset or calibrated.The mirror can be calibrated by driving the vehicle in
circles at 5 mph (8 km/h) or less until the display reads a
direction.
The compass can be calibrated by pressing and holding
the on/off button until a C is shown in the compass
display.
Compass Variance
Compass variance is the difference between earth’s
magnetic north and true geographic north. If the mirror
is not adjusted for compass variance, the compass
could give false readings.
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 the vehicle is
driven outside zone eight. Under certain circumstances,
such as a long distance, cross-country trip, it will be
necessary to adjust the compass variance.
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Page 103 of 442
To adjust for compass variance, do the following:
1. Find your current location and variance zone
number on the zone map that follows.2. Press and hold the on/off button until a zone
number appears on the display.
3. Once the zone number appears on the display,
press the on/off button quickly until you reach
the correct zone number. If C appears in the
compass window, the compass may need
calibration. See “Compass Calibration” listed
previously.
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.
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Page 104 of 442

Outside Power Heated Mirrors
The controls on the driver’s door armrest operates both
outside rearview mirrors.
Press the left or right mirror symbol on the selector
control to choose the driver’s side or passenger’s side
mirror. The center position is off and will not move
the mirrors if the directional control pad is touched.Once the mirror to be adjusted is selected, use the
arrows on the directional control pad to move the mirror.
Adjust each mirror so you can see the side of the
vehicle and the area behind it.
The mirrors can be manually folded inward to prevent
damage when going through an automatic car wash or a
con ned space. To fold, push the mirror toward the
vehicle. To return the mirror to its original position, push
outward. Be sure to return both mirrors to their original
unfolded position before driving.
The preferred position can be stored in memory if the
vehicle has the memory option. SeeMemory Seat
and Mirrors on page 2-53for more information.
When the rear window defogger is turned on, both
outside rearview mirrors are heated to help clear them
of ice, snow, and condensation. See “Rear Window
Defogger” underDual Climate Control System on
page 3-25for more information.
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