i need radio wiring diagram for a 2005 gmc truck without the bose system. Back to Top. KarTuneMan . Platinum - Posts: 7,056. Joined: December 14, 2004. Location: Isle Of Man. Posted: September 11, 2005 at 7:17 PM / IP Logged Radio 12v: orange + radio harness : Radio Ground: BLACK/ white - radio harness. RADIO Base Radio Wiring Diagram for GMC Sierra 2500 HD 2005List of elements for Base Radio Wiring Diagram for GMC Sierra 2500 HD 2005:A10A11A12AntennaAud out -B10B11B12BareCell voice sigCoaxCommon aud sigComputer data lines systemDigital radio antennaDigital radio receiver (if equipped) (behind right side of instrument panel)Drain wireG203 (near left \
Spliced into the harness behind the dash. This seemed easier than opening the radio to me. The wires will be in a bundle wrapped with tape and shielding. DO NOT get the other green wire that isn't wrapped up with the shielding. Pin 1: To black/white wire Pin 2: To Radio side of brown/white wire Pin 3: To XM side of brown/white wire. Understanding the 2005 GMC Sierra Radio Wiring. In this section, we will delve into the intricacies of the audio system connections for a mid-2000s full-size pickup. Whether you are upgrading to a modern sound system or troubleshooting existing issues, knowing how the various wires interact and connect is essential.