2004 gmc Z71 wiring diagram?

I need the speaker wire colors....and alarm diagram does anyone have a wiring diagram for a 2004 Z71 truck???   im not going to replace the radio for the guy i told him the possible complications, and he also has been to 2 other places and they wouldnt touch the truck. I am wiring subs using the rear speakers for a signal to a line converter...also does anyone know if the voltage on this vehicle's switched ing. wire will be to much for the RMT turn on lead....normaly I just use that or a constant supply with a in line switch that i will mount on the dash somewhere, but he dosent want a switch.   So i want to use a tap off of the switched wire as a turn on lead, anyone see any prob's with this in one of these vehicle's?     He also wants an aftermarket alarm/remote start, so i need that diagram if possible as well2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR

2007 USACI World Champion

2007 World Record

2006 USACI Finals 2nd Place

Is it true that with almost all the 2000 and over trucks and pickups with a sub that the speakers in the doors have a high pass filter on them so they wont play and low frequencies. If it is you have to use some special preamp-output adaptor (not an LOC ,the adaptor I know of installs into the factory wiring harness so you get a full range signal).

thanks, i know it dosent have a stock sub thats why he wants to add 2 under the rear seats....2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR

2007 USACI World Champion

2007 World Record

2006 USACI Finals 2nd Place