You may try and PM 'Hack' (Scott Williams) and see if he would be willing to hep you out.
Scott used to own AudioFX in Georgetown & Austin TX, and installed the remote start system in my Tahoe.
He has since sold the business, and is now doing stuff with 4X4s, but you can try hitting him up and ask if he can assist ya, if someone here doesn't have the answers you need first.
Clear Image Tri-Ys & Hi-Flow cats >> 2.5" X-Pipe & Magnaflow Tri-Chambers, Mike Harris 4L60E, Circle-D 2,400 RPM TC, All MOOG FT End & Del-A-Lum bushed MOOG CTRL Arms, Eibach FT & New Stock HT rear springs. Hotchkis Sway Bars & End Links, RAISS, 3.73 Gears in Eaton carrier, Dynoshaft & CIA Loop, BMR Trailing Arms, Braided Brake Hoses, Taylor Spiro-Pro Wires, AutoMeter Water Temp & Oil PSI Gauges, Impala Console. ATE Blue Brake Fluid. Skip White distributor. 20's, Z28 Cluster, Corbeau GTS Seat