GMC Canyon Owner's Manual page 382

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, turn the ignition switch to LOCK and
start over beginning with Step 2. 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.
7. Proceed to the passenger's side rear tire, and
repeat the procedure in Step 5.
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8. Proceed to the driver's side rear tire, and
repeat the procedure in Step 5.
9. After hearing the confirming horn chirp for the
driver side rear tire, check to see if the TPMS
low tire warning light and the DIC LOW
TIRE messages have turned off. If yes, the
TPMS sensors have been relearned. Turn the
ignition switch to LOCK.
If the low tire warning light and the DIC SERV
TPM messages are on after completing
Step 5 for the driver side rear tire, the sensor
relearn process has not been successful.
Turn the ignition switch to LOCK and repeat
the matching process beginning with Step 2.
10. Set all four tires to the recommended
air pressure level as indicated on the Tire and
Loading Information label.
11. Put the valve caps back on the valve stems.