I got a viper 5901 alarm with remote start keyless entry, proximity sensor, tilt sensor, LED bar, and the mic that goes off when the glass breaks.. Spent over 1200 on alarm and install a few months ago.. My pk3 chip went out on my sierra and the GM place wouldnt touch my electrical until the alarm was uninstalled. I had it professionally uninstalled and i dont have a system any more so i dont really need allt he functions on this alarm... guaranteed to work... 10/10 functionality and appearance........... 300$ shipped obo... awesome alarm... look it up and see what it costs for all of these add ons.. PM me.. i lose track of these threads... Thanks