4 kill switches total in the yukon and tahoe. Changed the color of the ignition leads from the solenoid and ran relays and switches connected to the horns/air-horns. If the alternate color ignition wires are bridged or even the correct key is turned before flipping the switch.. it honks. The other relays and switches go to the fuel pumps. The switches are linked to random stock switches and the stock to aftermarket switches. Autopage/start alarms w/ GPS location linked to the phone are also installed. The autopage has been rigged to lock the doors and deny exit, windows roll up and the manual lock plastic trim pieces are dummies switched to a micro-piezo siren (110db) disorienting. OnStar is active as well as is full coverage insurance. Could have installed strobes in the dash to temporarily blind the purp yet.. is any of this really necessary? Having a few vehicles stolen and chopped researching online forums like this have given me a few weekend projects. All of these are pretty basic wiring and don't take long to install. Over that past couple years i'd say I've invested a good 10 hours and 0$ in materials I already had laying around the house. The autopage alarm is fairly inexpensive and one wouldn't need the GPS unless they've been towed. Well, enjoy and have fun.