2001 Chevrolet Suburban Alarm/Remote Start

Personally, I would spend the money and use the GMBP over the PLXR for this vehicle. Less hassles with programming and also more reliable with the databus connection.

Some remote starter systems come with the starter disable relay and other don't. Depending on the system that your getting will determine if you need one. They're relatively cheap to buy from an automotive shop or a electronics store.

Can I just use a DEI 555L? or is the GMBP still superior for some reason?

Thanks again,

Dan

The 555L will work fine on this vehicle, but what Jeff was saying is that the GMBP would be EASIER.  The Autopage is a very straight forward install.  It provides you with the ignitions you will need for your car, no relays needed for ign1, ign2, acc, and start.  This unit also provides internal relays for your door locks.  As far as I can tell, you won't need a single relay.  If you use a module that requires a "ground when running", use the yellow wire from the Autopage 720.  Other than that, all the connections can be made at the ignition harness and the BCM.  This will allow a nice, clean install with only one loom of wires under your dash. 

One note on the side, when you take the underdash skirting off, there will be a piece of metal covering the BCM, looks like a helmet.  4 10mm bolts holding it on.  Pay attention to where you run you wires around this "helmet."  Try to keep them with the factory wires.  If not, you will not be able to put this piece of metal back, and will have to undo all you connections and re-route, pain in the a$$.  Good luck, very familiar with Autopage.  If you need any help, PM me.