Pontiac 2007 Torrent Owner's Manual page 398

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 TIRE LOCATIONS PRESS
TO LEARN 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
displays. The TPMS system is ready for the
sensor matching process to begin.
5. Start with the driver 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.
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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.
V
7. Proceed to the passenger side front tire, and
repeat the procedure in Step 6.
8. Proceed to the passenger side rear tire, and
repeat the procedure in Step 6.
9. Proceed to the driver side rear tire, and
repeat the procedure in Step 6.
10. After hearing the confirming horn chirp for the
driver side rear tire, the tire learning process
ends. Turn the ignition switch to LOCK.
11. Set all four tires to the recommended air
pressure level as indicated on the tire and
loading information label.
12. Put the valve caps back on the valve stems.