Ever since my first break in back in 1993 to my 1987 Olds 442 I have never owned a vehicle with out a viper alarm system. Back when the Viper talked to you (PROTECTED BY VIPER STAND BACK) I just installed a Viper 5902 in my Denali. I install all my own shit. Ive have blown more fuses and ****** up many wires plus one control box to get where I am today. I love DIY shit and so I started installing Car alarms with auto start into my vehicles. My first system was on my 1992 Bonneville SSEi and it took me 2 weeks and a couple calls to viper but I finally got it. I install units for friends because I want to get more educated on all systems. The Viper 5902 took me about 5 hours so I would recommend having a shop do this one because it has a ton of features. If any of you try to tackle a Alarm install/auto start install Im always available to give you assistants. Anything for my fellow S-U-V-S.