GMC 2011 Sierra - Manual (Page 58)

Black plate (14,1) GMC Sierra Owner Manual - 2011
2-14 Keys, Doors and Windows
If the engine still does not start, and
the key appears to be undamaged,
try another ignition key. At this
time, you may also want to check
the fuse. See Fuses and Circuit
Breakers on page 10‑50. If the
engine still does not start with the
other key, the vehicle needs service.
If the vehicle does start, the first key
may be faulty. See your dealer who
can service the PASS-Key III+ to
have a new key made.
It is possible for the PASS-Key III+
decoder to learn the transponder
value of a new or replacement key.
Up to 10 keys may be programmed
for the vehicle. The following
procedure is for programming
additional keys only. If all the
currently programmed keys are
lost or do not operate, you must
see your dealer or a locksmith who
can service PASS-Key III+ to have
keys made and programmed to the
system.
See your dealer or a locksmith who
can service PASS-Key III+ to get a
new key blank cut exactly as the
ignition key that operates the
system.
To program the new additional key:
1. Verify that the new key has
a
1
stamped on it.
2. Insert the original, already
programmed key in the ignition
and start the engine. If the
engine will not start, see your
dealer for service.
3. After the engine has started,
turn the key to LOCK/OFF, and
remove the key.
4. Insert the new key to be
programmed and turn it to
the ON/RUN position within
five seconds of turning the
ignition to the LOCK/OFF
position in Step 3.
The security light will turn
off once the key has been
programmed.
5. Repeat Steps 1 through 4 if
additional keys are to be
programmed.
If you lose or damage your
PASS-Key III+ key, see your dealer
or a locksmith who can service
PASS-Key III+ to have a new
key made.
Do not leave the key or device
that disarms or deactivates the
theft-deterrent system in the vehicle.