Chevrolet 2006 Avalanche Owner's Manual page 434

Resetting the TPMS Identification Codes
Each TPMS sensor has a unique identification
code. Any time you rotate your vehicle's tires or replace
one or more of the TPMS sensors, the identification
codes will need to be matched to the new tire/wheel
position. Each tire/wheel position is matched to a
sensor, by increasing or decreasing the tire's air
pressure. The sensors are matched to the tire/wheel
positions in the following order: LF TIRE (left front tire on
the driver's side of the vehicle), RF TIRE (right front
tire on the passengers side of the vehicle), RR
TIRE (right rear tire on the passengers side of the
vehicle), and LR TIRE (left rear tire on the driver's side
of the vehicle).
You will have one minute to match the first tire/wheel
position, and five minutes overall to match all
four tire/wheel positions. If it takes longer than
one minute, to match the first tire and wheel, or more
than five minutes to match all four tire and wheel
positions the matching process stops and you will
need to start over.
5-74
The TPMS sensor matching process is outlined below:
1. Set the parking brake.
2. Turn the ignition switch to RUN with the engine off.
3. Turn the headlamp switch from off to the parking
lamps setting four times within three seconds. A
double horn chirp will sound and the TPMS low tire
warning light will begin to flash. The double horn
chirp and flashing TPMS warning light indicate that
the TPMS matching process has started. The
TPMS warning light should continue flashing
throughout the matching procedure. The SERVICE
TIRE MONITOR message will be displayed on
the Driver Information Center (DIC).
4. Start with the driver's 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, confirming that the sensor identification
code has been matched to this tire and wheel
position. If you do not hear the confirming single
horn chirp, you will need to start over with Step 1.
To let 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.