Wiring Avital 5303L, 1988 GMC Van

Trying to connect Avital is a bit confusing to me,Please Help!!!! So I need to connect all the heavy duty remote start wires? Im working on a 1988 G1500 GMC van.(Rally STX) And also have problems with (what is ignition and Accessory 2 on the ignition switch of my vehicle. Oaklandstroak52

On your GMC, Pink is the Ignition wire, Orange is the Accessory wire, and Purple is the Starter wire. No "Accessory 2" is listed for your vehicle. To answer your question "So I need to connect all the heavy duty remote start wires?" the answer is NO. You only make the connections necessary to make your installation work (make the vehicle run). Aftermarket Alarms and Remote Starts are designed to work with a wide variety of vehicles so many features and connections are available to cover the installations that need them. You will almost always have unused wires when an install is complete.