2nd accessory needed on 2003 Silverado?

I have a 2003 Chevrolet Silverado 2500HD with the Duramax diesel. I have head conflicting stories on whether the second accessory (brown) wire needs to be hooked up when installing a remote start. I will be using the CrimeStopper RS-1905FM remote start with either a GM-SL or 457G data bypass. Anyone out there know if I will need to use the accessory 2 wire? I am hoping not as the remote start I am installing has an option where one wire can either be second ignition (which I know I need) or second accessory, so it would avoid me having to wire an external relay. Also, one other question: if you had the GM-SL and 457G, which one would you use? Any preference? Thanks, Beltbuckle

99% of the time I don't hook up the brown wire. A couple times I have had to for some odd reason. I don't think the heater controls turned ON in those couple trucks.

I have not run into any of these trucks that needed the second acc brown wire, even the diesels..

the only newer vehicle that has needed this wire that I have run into was the 06 Trailblazer, I've never had to hook it up in a pickup like yours.Shaun, we are the same height, that is neat!

12V Installation Technician for Honda, Dodge, Chrysler, Toyota and Jeep.

Much like everyone I have not had any issue with not connecting the brown wire. On a personnal note I perfer to power everthing up on GM product. Too many unknown future issue has not been noted. When in doubt, power everthing up like you would starting the vehicle using the key !    Be careful whose advice you buy, but be patient with those who supply it.

thepencil wrote: Much like everyone I have not had any issue with not connecting the brown wire. On a personnal note I perfer to power everthing up on GM product. Too many unknown future issue has not been noted. When in doubt, power everthing up like you would starting the vehicle using the key !

The best answer......

The 2nd acc brown is only necessary on trucks with quadrasteer. Mike

Actually I had a customer come back with the same truck on which I didn't connect the BROWN ACC wire. Once started the truck "hesitated" while running, was somewhat weird, but once the ACC2 was connected everything ran smooth.

Thanks for all the responses guys, I appreciate it. Any thoughts on the GM-SL vs. the 457GW? I have both coming to me and not sure which one I'll use. It looks like the GM-SL has more features.