keyless entry
The UTD and Passkey are both decent systems, no argument.
I installed the VKE1000 on my '96 (already equipped w/ PKE) and was able to integrate it with the UTD fairly successfully. The PKE was really a non-issue (since it can be turned off). VATS/Passkey is a non-issue unless dealing with remote start.
Bottom line... the factory alarm, VATS/Passkey, and PKE will not pose a problem with aftermarket alarms/keyless entry, as long as you take the time to do some research on how everything functions, and how to integrate everything properly using wiring, relays, and diodes. Unfortunately, many alarm shops will not spend the time doing so....







