Chevrolet Impala 2007 Owner's Manual page 363

TPMS Sensor Identification Codes
Each TPMS sensor has a unique identification
code. Any time you replace one or more of
the TPMS sensors or rotate the vehicle's tires,
the identification codes will need to be matched
to the new tire/wheel position. The sensors
are matched, to the tire/wheel positions, in the
following order: driver's side front tire, passenger's
side front tire, passenger's side rear tire, and
driver's side rear tire using a TPMS diagnostic
tool. See your GM dealer for service.
The TPMS sensors may also be matched to each
tire/wheel position by increasing or decreasing
the tire's air pressure. When increasing the tire's
pressure, do not exceed the maximum inflation
pressure indicated on the tire's sidewall.
You will have two minutes to match each tire
and wheel position. If it takes longer than
two minutes to match any tire and wheel position,
the matching process stops and you will need
to start over.
The TPMS matching process is outlined below:
1. Set the parking brake.
2. Turn the ignition switch to RUN with the
engine off.
3. Using the DIC, press the vehicle information
button until the LEARN TIRE POSITIONS
message displays.
4. Press the set/reset button to allow the system
to learn the tire positions. The horn will sound
twice to indicate the receiver is ready, and
the TIRE LEARNING ACTIVE message
will display. The TPMS system is ready for
the sensor matching process to begin.
5. Start with the driver's side front tire.
6. Remove the valve cap from the tire's valve
stem. Activate the TPMS sensor by increasing
or decreasing the tire's air pressure for
five seconds, or until a horn chirp sounds.
The horn chirp, which may take up to
30 seconds to sound, confirms that the sensor
identification code has been matched to the
tire/wheel position. To decrease the tire's
air-pressure use the pointed end of the valve
cap, a pencil-style air pressure gage, or a key.
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