GMC T-Series 1999, Owner'S Manual, Page: 40 / 344

yellow blue
2-4
To lock your door from the inside, push the lock control
in. To unlock the door, pull the lock control out.
When the doors are locked, they can’t be opened by
using the inside handles until the lock control is
pulled out.
Leaving Your Vehicle
If you are leaving the vehicle, take your keys, open your
door and set the locks from inside. Then get out and
close the door.
Theft
Vehicle theft is big business, especially in some cities,
and even commercial vehicles are no exception.
Although your vehicle has a number of theft
-
deterrent
features, we know that nothing we put on it can make it
impossible to steal. However, there are ways you
can help.
Key in the Ignition
If you leave your vehicle with the keys inside, it’s an
easy target for joy riders or professional thieves
--
so
don’t do it.
Remember to remove your key and take it with you.
Always do this. When you take your key with you, your
ignition will be locked. Also remember to lock
the doors.