I have had my 97 Silverado, sense 2004. I had a Python alarm installed in the truck in about 2006. The key fob quit on me last year, ( tried a new battery but no go). So I figured I would replace the Python alarm with a Viper alarm. I ordered it from Amazon. Sense there was already an alarm in the truck the install was simple enough. Once I removed the alarm ECM, I compared the old alarm ECM to the new alarm ECM. Well turns out that Viper makes Python. The new system was an updated version of what I had in the truck before. Perfect. An easy swap. I thought about a remote start, but decided I did not need one. It doesn't get cold here much, and when it does, it doesn't last more that a few days. I know the key fob range a long, maybe 1500 feet IDK. I just wanted the alarm for the key less entry, but it has prevented a brake in several times before. I don't live in a bad area, but there are those that will get into your vehicle at night and see what they can steel. The alarm has tripped maybe 4 or 5 times sense 2006 for no reason other that someone messing with my truck.