Ok so I bought a key fob from ebay, and it wont work with my car??
I checked the batt and its good, they sent me part number 16245103-5 (96-98)
(I own a 96 TA with antitheft rpo UA6)

This is were it gets complicating??

So according to the sticky on here a anti-theft car needs part number 16245100-29 (96-02)

But in the ebay item title it read "2000, 2001, 2002"
and in the description it reads "PART # : GM 16207901-5 or GM 16245100-29"

Question #1 -Are both part # interchangeable?

Question #2 -Is there something wrong or turned off in my car that I cant program this key fob to my car. When useing the directions below, everything goes great till step 2. When I press and hold both buttons in for 15sec, the locks dont cycle. What should I check?

Question #3 -My car has a aftermarket alarm hooked up that I never use and dont plan on ever,,, is there anyway the person installing this unhooked or turned off the factory alarm or lock feature.

(here is the instructions that i used)
’96-‘00
Programming

1. Turn ignition off. Remove RADIO (fuse No.17) from fuse block. Cycle ignition switch from OFF to RUN positions 3 times within 5 seconds until door locks and hatch release cycles, indicating Body Control Module (BCM) is in programming mode. Leave ignition switch in RUN position.

2. Press both LOCK and UNLOCK buttons on remote control door lock transmitter for 16seoncds. Door locks will cycle once, confirming transmitter code is programmed. Door locks must cycle completely to unlock before proceeding. Any transmitter code that was previously programmed has been erased. BCM is now programmed to remote control door lock transmitter.

3. When programming BCM to match remote control door lock transmitters, first transmitters code matched will be stored in memory unless a second remote control door lock transmitter is matched at the same time. If programming BCM to match a second remote control door lock transmitter, repeat step 2). This must be done before RADIO (fuse No. 17) is reinstalled. Turn ignition off. Reinstall RADIO (fuse No. 17) to fuse block.

NOTE: Always program both remote control door lock transmitters when replacing a lost or damaged transmitter.

 

It seems you have the wrong part number. Part 16245103 is for 96-98 with keyless entry (AU0) without alarm (UA6). Part 16245100 is for 96-02 with both options.

 

ok cool,, they just told me they are going to send the proper remote to me now.