GMC 1995 Suburban Owner's Manual page 74

Your vehicle has one
double-sided key for
the ignition and all
door locks.
If yo1
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ever lose your keys, your dealer will be able to assist you with
obtaining new ones.
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.
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