GMC 2001 Jimmy Owner's Manual page 74

When a new vehicle is delivered, the dealer provides the
owner with a pair of identical keys and a key code number.
The key code number tells your dealer or a qualified
locksmith how to make extra keys. Keep this number in
a safe place. If you lose your keys, you'll be able to have
new ones made easily using this number. Your selling
dealer should also have this number.
2-6
This vehicle has one
-
double sided key for the
ignition, endgate/liftgate,
-
spare tire lock (two door
vehicles) and door locks.
It will fit with either
side up.
NOTICE:
Your vehicle has a number of new features that
can help prevent theft. But you can have a lot of
trouble getting into your vehicle if you ever lock
your key inside. You may even have to damage
your vehicle to get in. So be sure you have an
extra key.
If you ever do get locked out of your vehicle, contact
roadside assistance for help. See "Roadside Assistance"
in the Index for more information.