just got mine in...
I just got Viper 5900 installed on mine last Sunday. But i'm not really satisfied with the installation so i'm taking it back to get it fixed. First i dun like the siren, it sounds like a cheap alarm with bird chirping. Then they did not have the shock sensor sensitivity any high. I can bang the whole truck upside down and it won't go off. The biggest issue i have and i spent all my money on "The Best Alarm Out There" was the 1-mile range. But its not holding even in a 1/4 mile range. I park at university parking which is big but no buildings, and still it don't hold till my building.
So after i discuss and get these issues fixed, i'm keeping my fingers cross. Coz i love the system, i just want it to work right, ALL the way.