GMC Yukon Denali 2006 Manual page 379

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.
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.
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 left
rear tire, check to see if the TPMS warning light is
still flashing. If it is, turn the ignition switch to LOCK
to exit the sensor matching process. If the TPMS
warning light is not flashing, the five minute time limit
has passed and you will need to start the process
over beginning with Step 1.
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
The spare tire does not have a TPMS sensor. If you
replace one of the road tires with the spare, the CHECK
TIRE PRESSURE message will be displayed on the
DIC screen. This message should go off once you
re-install the road tire containing the TPMS sensor. The
SERVICE TIRE MONITOR message is displayed
when the TPMS is malfunctioning. One or more missing
or inoperable TPMS sensors will cause the service
tire monitor message to be displayed. See your dealer
for service.
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