Chevrolet 2006 Monte Carlo Owner's Manual page 306

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.
5-64
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.