GMC door locks?

  Am installing starter/alarm but don't know which of the drawings to go by for the locks-98 GMC Sierra - positive trigger / negative trigger ,  5 wire alternating , two step positive or negative , too many options for a newbee. The first two diagrams use no relays , if the existing circutry allready employs relays areadditional relays needed?

  thanks for any help given Tony M.

P.S. The unit is a Commando FM-870  two way  remote start / alarm

This is the info I have for that truck.

This link is from this site it explains the different type of door locks.

https://www.the12volt.com/doorlocks/doorlocks.asp#det

https://www.the12volt.com/doorlocks/page3.asp#5w

   Thanks for the links, I understand the various diagrams, but what are type "A" & "C" door locks ? The difference is not indicated on the links.

 Tanks again for any input on this  Tony M.

I tried to paste instructions but did not work. I will try to correct problem.

5 wire (type C) on the two door models, and positive trigger (type A) on the four door and keyless entry models.

POWER LOCK---------lt. blue @ either door boot           

Type A is a (+) type door lock system where if you momentarily touch the target wire with a (+) pulse, it will activate the lock/unlock . Type C does the same with a (+) pulse but isolates the switch from seeing 12 volts to avoid possible damage to the switch.         

   I have a two door with keyless entry , so what I need to do is use two relays to reverse my (-) lock & unlock outputs from the alarm to (+) outputs and connect to the lock & unlock wires ?

you guys are a big help , wish me luck  Tmon.

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