Buick 2007 Rainier Owner's Manual page 423

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 the first
tire/wheel position, and five minutes overall to
match all four tire/wheel positions. If it takes longer
than two minutes, 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.
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 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 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.
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
number one. 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.
6. Proceed to the passenger's side front tire, and
repeat the procedure in Step 5.
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