Car Wiring Diagrams for Radio circuit, up level w/ amplifier for GMC Sierra III facelift (2015-2018)

AUX AUDIO COMM SIG AUX AUDIO SCREEN (2) AUX DETECTION SIG AUXILIARY AUDIO INPUT BASE EQUIPMENT EXCEPT BASE EQUIPMENT BATT POSITIVE VOLT BK AM/FM ANT SIG BLK WIRE BLK/YEL WIRE BLU WIRE COAX COMPUTER DATA LINES SYSTEM CU XM/HD DISTRIBUTION GMLAN SERIAL DATA GRN WIRE GROUND GRY WIRE GRY/GRN WIRE GRY/VIO WIRE HOT AT ALL TIMES IPC FUSE LEFT INSTRUMENT PANEL FUSE BLOCK LH AUX AUDIO SIG (2) LOGIC LOW REF LT BLU WIRE LT GRN WIRE LT GRN/DK BLU WIRE MEDIA DISC PLAYER MOST CONTROL MOST SERIAL DATA (+) NCA WIRE NETWORK BUS 10 POSITIVE VOLTAGE RADIO RADIO ANTENNA RDO FUSE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RH AUX AUDIO SIG (2) RIGHT INSTRUMENT PANEL FUSE BLOCK SERIAL DATA STEERING WHEEL AIR BAG COIL STR WHL CNTRL FUSE SYSTEM TELEPHONE VOICE SIG USB USB/OBS DET FUSE VIO WIRE W/ FRONT COMPARTMENT FLOOR CUSTOM CONSOLE W/ REAR SEAT ENTERTAINMENT W/O REAR SEAT ENTERTAINMENT WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE

BACK SIG BACKUP LAMP CTRL BATT POS VOLT BLK WIRE BLK/YEL WIRE BLU WIRE BRN WIRE BUS 12 CAMERA LOW REF CAMERA SIG 2 CIRCUIT COAX COMPUTER DATA LINES SYSTEM CTRL DIMMING DISPLAY DISPLAY SIG + DOWN SIG FORWARD SIG GMLAN SERIAL DATA GRN/BLK WIRE GRN/BRN WIRE GROUND GROUND DISTRIBUTION SYSTEM GRY/GRN WIRE GRY/VIO WIRE GRY/YEL WIRE HUMAN MACHINE INTERFACE CONTROL MODULE BYPASS MODULE INFO DISPLAY MODULE INFOTAINMENT INSTRUMENT PANEL JUNCTION BLOCK LEFT STEERING WHEEL CONTROLS SWITCH LOGIC LT GRN/DK BLU WIRE LT GRN/WHT WIRE LVDS MUTE NAVIGATION SYSTEM NCA WIRE NETWORK NETWORK BUS 10 NETWORK BUS 5 POWER DISTRIBUTION SYSTEM RADIO CONTROLS RADIO PRESETS STEERING WHEEL CONTROLS SWITCH RADIO VOLUME STEERING WHEEL CONTROLS SWITCH RAP RLY COIL CTRL REAR VIEW CAMERA CIRCUIT RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RIGHT STEERING WHEEL CONTROLS SWITCH SEATS SYSTEM SEEK DOWN SEEK UP SERIAL DATA BUS 5 SOUND SYSTEMS SOURCE UP SIG USB VIDEO SYSTEM VOICE VOL (-) W/ REAR VIEW CAMERA W/O REAR VIEW CAMERA WHT WIRE WHT/BLU WIRE WHT/YEL WIRE YEL WIRE YEL/BLU WIRE

1-VT 2-VT AMP FUSE AUDIO SIG + BATT POS VOLT BLK WIRE BLK/BRN WIRE BLK/GRY WIRE BLK/YEL WIRE BLU WIRE BLU/GRN WIRE CAMERA SIGNAL 2 CELL CELLULAR PHONE MICROPHONE CELLULAR PHONE NAVIGATION, DIGITAL RADIO ANTENNA COAX COMMUNICATION ENABLE COMPUTER DATA LINES SYSTEM DISPLAY SIG + GMLAN SERIAL DATA (+) 9 GPS GPS ANT SIG GPS/CELL GRY/VIO WIRE GRY/YEL WIRE HOT AT ALL TIMES HUMAN MACHINE INTERFACE CONTROL MODULE (BEHIND GLOVE BOX) INFOTAINMENT INSTRUMENT PANEL JUNCTION BLOCK LOGIC LOW REF LT GRN/WHT WIRE LVDS MICROPHONE SIG MOST CONTROL MOST SERIAL DATA (+) NAVIGATION ANTENNA SIGNAL SPLITTER NCA WIRE NETWORK BUS 5 RED WIRE RED/VIO WIRE RED/YEL WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK SER DATA TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE USB USB GY USB RECEPTACLE USB SERIAL DATA USB SRL DATA VOICE SIG W/ DIGITAL AUDIO SYSTEM W/ ONSTAR W/ ONSTAR W/O ONSTAR W/O ONSTAR WHT/BLU WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/LT GRN WIRE WHT/VIO WIRE X-BK YEL WIRE

AUDIO AMPLIFIER (UNDER REAR OF CENTER CONSOLE) BATT POS VOLT BLK WIRE BLU WIRE BLU/BLK WIRE BLU/GRY WIRE BRN/BLU WIRE BRN/GRN WIRE COMPUTER DATA LINES SYSTEM DK BLU/BLK WIRE DK BLU/YEL WIRE ENGINE CONTROLS SYSTEM GMLAN SERIAL DATA GRN WIRE GRN/BLK WIRE GROUND GRY/BLK WIRE GRY/BRN WIRE GRY/DK BLU WIRE GRY/GRN WIRE GRY/VIO WIRE LEFT FRONT DOOR SPEAKER LEFT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LEFT INSTRUMENT PANEL SPEAKER LEFT REAR DOOR SPEAKER LF SPKR LF SPKR 1 (-) LR SPKR LT GRN WIRE LT GRN/BLK WIRE LT GRN/BRN WIRE MICROPHONE 1 LOW REF MICROPHONE 1 SIG MICROPHONE 2 LOW REF MICROPHONE 2 SIG MICROPHONE 3 SIG MOST CONTROL NCA WIRE REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RED/YEL WIRE REPLICATED SIG RF SPEAKER (+) LH/RR SUBWOOFER SPKR (+) MICROPHONE 3 LOW REF RF SPEAKER (-) RH SUBWOOFER SPKR (-) RF SPKR RF SPKR 1 (-) RIGHT FRONT DOOR SPEAKER RIGHT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RIGHT INSTRUMENT PANEL SPEAKER RIGHT REAR DOOR SPEAKER RR SPKR SERIAL DATA SUBWOOFER SPEAKER VIO/BRN WIRE VIO/DK BLU WIRE W/ PREMIUM WHT WIRE WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRY WIRE