Originally Posted by Snakes709

Not sure if they are compatable with the Z but i had a Viper 2 alarm on my old cobalt and it worked great. Sensitivity was awesome, a leaf fell from a tree and set the alarm off one time. Also if someone tries to steal the car the engine dies. As for the Z, i have a Compustart alarm/remote starter...not installed yet but my buddy has the same system on his cobalt and he said its just as good as the viper alarms.