Re-set stock keyless entry features

I saw a post on here previously about disabling the auto-lock feature on the keyless entry where the doors automatically lock for you and unlock for you when you turn the key off. I have a 2001 Silverado, does anyone know how to ACTIVATE that feature? I bought my truck with 20k on it and whoever had it before me disabled the feature and with some of the places I've been driving lately, I really need to have the doors locked and I keep forgetting to manually do it. Any help would be great, thanks.

This is straight out of an 02 owner's manual. I hope it the same for your 01.

If your vehicle has power door locks, it is equipped with
a feature that enables you to program the door locks.

Your vehicle left the factory programmed to automatically
lock all doors when the vehicle is out of PARK (P), and
all doors unlock when the vehicle is in PARK (P). You can
set the automatic door lock feature to unlock the doors
you select once the vehicle is in PARK (P).

If your vehicle has a manual transmission it left the
factory programmed to lock all doors when the vehicle
speed is greater than 15 mph (24km/h) for two seconds,
and unlock all doors once the key is removed from the
ignition. You can set the automatic door lock feature to
unlock the doors you select once the key is removed
from the ignition.

The following instructions detail how to program your
door locks.
To enter the program mode you need to do
the following:

1. Beginning with the ignition in OFF. Pull back on the
turn signal/multifunction lever all the way toward
you until flash-to-pass is activated, and hold it while
you perform the next step.

2. Turn your key to RUN and OFF twice. Then, with
the key in OFF, release the turn signal/multifunction
lever. Once you do this, you will hear the lock
mechanism lock and unlock.

3. You are now ready to program the automatic door
locks. Select one of the following four programming
options and follow the instructions. You will have
thirty seconds to complete programming. If you
exceed the thirty-second limit, the locks will
automatically lock and unlock to indicate you have
left the program mode. If this occurs, repeat the
procedure beginning with Step 1. You can exit the
program mode any time by turning the ignition to
RUN (the locks will automatically lock and unlock
to indicate you are leaving the program mode.)
If the lock/unlock switches are not pressed while in
the programming mode, the automatic lock/unlock
setting will not be modified.

The following is a list of the available
programming options:


All doors lock/Only the driver’s door unlocks:
Press the lock side of the power door lock switch on
the door panel once and then the unlock side once.


All doors lock/All doors unlock: Press the lock side
of the power door lock switch on the door panel
once, and then the unlock side twice.


All doors lock/None of the doors unlock: Press the
lock side of the power door lock switch on the door
panel once, and then the unlock side three times.


No doors lock/None of the doors unlock: Press the
lock side of the power door lock switch on the door
panel twice. This turns off the automatic lock feature.
For more information, see your dealer.

Worked for my 01

will this work for a 2000 chev, new style

Thanks a lot!! Worked for me first time.