GMC 2007 Envoy - Manual (Page 96)

This vehicle has keys
that can be used for the
ignition and door lock
that will fit with
either side up.
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 will be able to have new ones made
easily using this number. Your selling dealer
should also have this number.
Notice: If you ever lock your keys in your
vehicle, you may have to damage the vehicle
to get in. Be sure you have spare keys.
If you ever do get locked out of your vehicle, call
the GM Roadside Assistance Center. See
Roadside Assistance Program on page 532.
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