2009 GMC ENVOY stop start

Tire Pressure Monitor System
The Tire Pressure Monitor System (TPMS) uses radio
and sensor technology to check tire pressure levels. The
TPMS sensors monitor the air pressure in your vehicle’s
tires and transmit tire pressure readings to a receiver
located in the vehicle.
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.Please note that the TPMS is not a substitute for proper
tire maintenance, and it is the driver’s responsibility to
maintain correct tire pressure, even if under-ination has
not reached the level to trigger illumination of the
TPMS low tire pressure telltale.
Your vehicle has also been equipped with a TPMS
malfunction indicator to indicate when the system is
not operating properly. The TPMS malfunction indicator
is combined with the low tire pressure telltale. When
the system detects a malfunction, the telltale will ash
for approximately one minute and then remain
continuously illuminated. This sequence will continue
upon subsequent vehicle start-ups as long as the
malfunction exists.
When the malfunction indicator is illuminated, the system
may not be able to detect or signal low tire pressure as
intended. TPMS malfunctions may occur for a variety of
reasons, including the installation of replacement or
alternate tires or wheels on the vehicle that prevent the
TPMS from functioning properly. Always check the TPMS
malfunction telltale after replacing one or more tires or
wheels on your vehicle to ensure that the replacement or
alternate tires and wheels allow the TPMS to continue to
function properly.
SeeTire Pressure Monitor Operation on page 5-64for
additional information.
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The TPMS sensors can also be matched to each
tire/wheel position by increasing or decreasing the tire’s
air pressure. If increasing the tire’s air pressure, do
not exceed the maximum ination pressure indicated
on the tire’s sidewall.
To decrease air-pressure out of a tire you can use the
pointed end of the valve cap, a pencil-style air pressure
gage, or a key.
You have two minutes to match the rst tire/wheel
position, and ve minutes overall to match all four
tire/wheel positions. If it takes longer than two minutes,
to match the rst tire and wheel, or more than ve
minutes to match all four tire and wheel positions the
matching process stops and you need to start over.
The TPMS sensor matching process is outlined below:
1. Set the parking brake.
2. Turn the ignition switch to ON/RUN with the
engine off.
3. Turn the headlamp control from off to parking lamps
four times within three seconds. A double horn
chirp will sound and the TPMS low tire warning
light will begin to ash. The double horn chirp and
ashing TPMS warning light indicate that the
TPMS matching process has started. The TPMS
warning light should continue ashing throughout
the matching procedure.
4. Start with the driver side front tire.5. Remove the valve cap from the valve cap stem.
Activate the TPMS sensor by increasing or
decreasing the tire’s air pressure for 10 seconds,
then stop and listen for a single horn chirp.
The single horn chirp should sound within
15 seconds, conrming that the sensor identication
code has been matched to this tire and wheel
position. If you do not hear the conrming single
horn chirp, you will need to start over with step
number one.
6. Proceed to the passenger side front tire, and repeat
the procedure in Step 5.
7. Proceed to the passenger side rear tire, and repeat
the procedure in Step 5.
8. Proceed to the driver side rear tire, and repeat the
procedure in Step 5.
9. After hearing the conrming horn chirp for the
driver’s side rear tire, check to see if the TPMS
warning light is still ashing. If yes, turn the ignition
switch to LOCK/OFF to exit the sensor matching
process. If the TPMS warning light is not ashing,
the ve minute time limit has passed and you
will need to start the process over beginning with
Step 1.
10. Set all four tires to the recommended air pressure
level as indicated on the Tire and Loading
Information label.
11. Put the valve caps back on the valve stems.
5-67

Sheet Metal Damage.....................................5-109
Shifting Into Park............................................2-34
Shifting Out of Park........................................2-36
Signals, Turn and Lane-Change.......................... 3-7
Snow Plow....................................................4-38
Spare Tire....................................................5-102
Installing....................................................5-92
Removing...................................................5-89
Storing.....................................................5-100
Specications, Capacities...............................5-120
Speedometer..................................................3-29
StabiliTrak Service Light...................................3-36
StabiliTrak
®Indicator Light...............................3-37
StabiliTrak®System.......................................... 4-6
Starting the Engine.........................................2-22
Steering........................................................4-10
Steering Wheel Controls, Audio.......................3-110
Steering Wheel, Tilt Wheel................................. 3-6
Storage Areas
Center Console Storage Area........................2-52
Convenience Net.........................................2-54
Glove Box..................................................2-51
Luggage Carrier..........................................2-52
Overhead Console.......................................2-51
Rear Floor Storage Cover.............................2-53
Storing the Tire Sealant and Compressor Kit......5-87
Stuck in Sand, Mud, Ice, or Snow.....................4-30
Sun Visors.....................................................2-15
Sunroof.........................................................2-55
T
Tachometer....................................................3-29
Taillamps
Turn Signal, and Stoplamps..........................5-47
Theft-Deterrent, Radio....................................3-110
Theft-Deterrent Systems...................................2-16
Content Theft-Deterrent................................2-16
PASS-Key
®III+ Electronic Immobilizer............2-18
PASS-Key®III+ Electronic Immobilizer
Operation................................................2-18
Passlock
®...................................................2-17
Tilt Wheel........................................................ 3-6
Time, Setting..................................................3-63
Tire
Pressure Light.............................................3-38
Tire Sealant
Storing.......................................................5-87
Tires.............................................................5-53
Aluminum Wheels, Cleaning........................5-109
Buying New Tires........................................5-70
Chains.......................................................5-76
Changing a Flat Tire....................................5-88
Cleaning...................................................5-109
Different Size..............................................5-72
High-Speed Operation..................................5-62
If a Tire Goes Flat.......................................5-76
Ination - Tire Pressure................................5-60
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