I would like detailed, specific instructions on how to program a
keyless remote control for a 2002 Chevrolet Trailblazer LS.  The
remote control locks and unlocks the doors and activates and
deactivates the alarm.  I have two remote controls and would like to
add this one as a "spare".  If I have to, I will reprogram all of
them.

jchaconas..

Thanks for your question.  Here is how you program your new remote:

Programming Keyless Remotes 2002 TrailBlazer, Envoy, Bravada
1- Close all the vehicle doors
2- Insert the key into the ignition cylinder (do not turn on)
3- Press and hold the door unlock switch
4- While holding the door lock switch in the unlock position, cycle
the
ignition ON, OFF, ON, OFF.
5- Release the door unlock switch. The doors will lock and unlock to
confirm
the program mode
6- Press and hold the LOCK and unlock button simultaneously on one
transmitter. After a delay of approx. 15 seconds, the doors will lock
and
unlock to confirm the programming of that transmitter.
7- Repeat the previous step to program up to 4 transmitters.
8- Turn the ignition switch to the run position in order to exit the
keyless
entry transmitter program mode.
9- Operate the transmitter(s) functions to verify proper operation.
Remote Programming
http://forums.vmag.com/suvenvoy0199/messages/1308.html

Thanks again for your question.  If you need any additional
clarification, please let me know prior to rating my answer.

Regards,

-THV

Search Strategy:
programming keyless remote trailblazer

Thanks for the prompt answer

Thanks for the rating and the generous tip.  Glad I could be of assistance.

-THV