[igotjam]

Thanks for all the PMs. The system is now sold. Hope he has better luck than I did.
The main problem is that in order to install one must jack up each corner of the truck, undo 10 lugs and remove the wheels to get at the valve stems. Doing it with hand tools in the driveway is tough. When a sensor de programs or alarms (as mine did frequently) you have to repeat the procedure. Just too much work involved for a system that kept alarming for no reason.
As everyone else seems to like it, I guess mine was just a lemon.