GMC 2007 Yukon XL Owner's Manual page 135

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 540. If the
engine still does not start with the other key, your
vehicle needs service. If your vehicle does start, the
first key may be faulty. See your dealer who can
service the PASS-Key
made. In an emergency, contact Roadside
Assistance.
It is possible for the PASS-Key
"learn" the transponder value of a new or
replacement key. Up to nine additional 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
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 that is cut
exactly as the ignition key that operates the
system.
®
III+ to have a new key
®
III+ decoder to
®
III+ to
To program the new additional key do the
following:
1. Verify that the new key has a
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
OFF, and remove the key.
4. Insert the new key to be programmed and turn
it to the RUN position within five seconds of
removing the original key.
5. The security light will turn off once the key
has been programmed.
6. Repeat Steps 1 through 5 if additional keys
are to be programmed.
If you are driving and the security light comes on
and stays on, you may be able to restart your
engine. Your PASS-Key
may not be working properly and must be serviced
by your dealer.
If you lose or damage your PASS-Key
see your dealer or a locksmith who can service
®
PASS-Key III+ to have a new key made.
1
stamped on it.
®
III+ system, however,
®
III+ key,
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