I have a 2007 Chevy Express work van and I installed the alarm and remote starter but the truck starts up and shuts off right away. I have now found I have "Passlock" on the truck and need to buy a seperate module for the remote start to work but I have found there are many variations of Passlock out there. How do I know which one I have? Passlock I, Passlock II and Vats

I have a key made from Home Depot so I'm pretty sure that I don't have Vats


Any help would be great