Door Locks - GMC 1999 Suburban Owner's Manual

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

Door Locks

CAUTION:
Unlocked doors can be dangerous.
--
Passengers especially children
open the doors and fall out. When a door is
locked, the inside handle won't open it.
Outsiders can easily enter through an unlocked
door when you slow down or stop your vehicle.
This may not be so obvious: You increase the
chance of being thrown out of the vehicle in a
crash if the doors aren't locked. Wear safety belts
properly, lock your doors, and you will be far
better off whenever you drive your vehicle.
There are several ways to lock and unlock your vehicle.
From the outside, use your key.
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can easily
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