Keyless Entry Installation Diagram for a 1996 Chevy Van?

I just bought a Rattler model 100 key less entry kit. Where in the heck can I get a diagram that makes sense to install this thing? I wish to put it in 1996 full size Chevy van that has power locks.

Is this one of those "retailer install only things"?

I went to DEI and they only have the same wiring diagram that is in the box.

Surely there is something out there that will tell me what wire to splice into which wire. Color coded would be nice.

Thanks in advance