2005 Chevrolet Silverado, Avital 5105L Remote Start, GMDLBP

It's been a day or two since I used to install remote starts, and so I have a question. I have an Avital 5105L and a GMDLBP that I know will do the job, but after looking at the ignition wiring diagram, it appears there are two ignitions, pink and white, and two accessories, brown and orange, that needs to be powered. Most all of the write-ups I have seen only mention pink, white and brown, but not orange. The 5105L has 3 outputs, and not 4. Should I use a relay and to power the orange wire as well? It appears that the orange wire may not need to be powered at all during start and run, so maybe I shouldn't even worry about it?

Power pink (Ignition) White (Ignition 2, transmission) and Orange (Hot in Run , Heater and A/C.) Brown is ACCY (Hot in ACCY or RUN.) Generally, in GM of the era Brown is for radio and wipers. Radio and wipers are not needed in an unoccupied vehicle. So the Brown doesn't need to be powered during RS. Orange should be, if you want the pre-set A/C Heater to operate during RS.

Thanks. The only thing I was worried about was the BCM power that it shows pulls from it.

I'm just guessing with regards to the Silverado (because I don't work on the Trucks), but in many GM of the era the BCM controls the Delayed Accessory Buss Relay. This buss powers the Radio and Power Windows. The input brown wire input to the BCM is for the DAB control. Even if it is used for other BCM functions, it probably doesn't matter in an unoccupied vehicle. I'd try it first without powering the Brown wire. It will probably work as expected.