Hi all.. I need the Pin Outs on the cluster for an 03 chevy Avalanche 5.3L I am changing my cluster to all autometer guages and was wondering what wires I need to tap into from the factory harness to make it all work?

Guages being used..

5" 140 MPH Electric Speedo
3.5" 8K Electric Tach
2 1/16" Fuel Level
2 1/16" Volts
2 5/8" Oil Pressue
2 5/8" Water temp

Warning Lights for:
Oil Pressure
Water temp
High Beam
SES
Brake
Cargo Light
Tow/haul

I was thinking I could just use the factory harness to control all this or am I just kidding myself??