GMC Sierra III facelift (2015-2018) Radio circuit, up level w/o amplifier

AM/FM BK AUX AUDIO COMM SIG AUX AUDIO SCREEN (2) AUX DETECTION SIG AUXILIARY AUDIO INPUT BACKUP LAMP CTRL BATT POS VOLT BLK WIRE BLK/YEL WIRE BLU WIRE BRN WIRE CAMERA LOW REF CAMERA SIG 2 COAX COMPUTER DATA LINES SYSTEM DISPLAY SIG + GRN WIRE GROUND GROUND DISTRIBUTION GRY WIRE GRY/VIO WIRE GRY/YEL WIRE HOT AT ALL TIMES HUMAN MACHINE INTERFACE CONTROL MODULE BYPASS MODULE INFOTAINMENT INSTRUMENT PANEL JUNCTION BLOCK IPC FUSE LEFT INSTRUMENT PANEL FUSE BLOCK LH AUX AUDIO SIG (2) LOGIC LOW REF LT BLU WIRE LT GRN WIRE LT GRN/WHT WIRE LVDS MOST CONTROL MOST SERIAL DATA (+) NAVIGATION SYSTEM NCA WIRE POWER DISTRIBUTION SYSTEM RADIO RADIO ANTENNA RAP RLY COIL CTRL REAR VIEW CAMERA CIRCUIT RED/GRY WIRE RED/VIO WIRE RH AUX AUDIO SIG (2) SERIAL DATA BUS 5 SYSTEM TELEPHONE VOICE SIG USB VIO WIRE W/ FRONT COMPARTMENT FLOOR CUSTOM CONSOLE WHT/BLU WIRE WHT/LT GRN WIRE WHT/VIO WIRE XM/HD CU YEL WIRE

BACK SIG BASE EQUIPMENT BATT POS VOLT BLK WIRE BLK/YEL WIRE BLU WIRE BUS 12 CIRCUIT COAX COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + DOWN SIG EXCEPT BASE EQUIPMENT FORWARD SIG GMLAN SERIAL DATA GRN/BLK WIRE GRN/BRN WIRE GROUND GROUND DISTRIBUTION SYSTEM GRY/GRN WIRE GRY/YEL WIRE HOT AT ALL TIMES HTD STEERING IND SIG INFO DISPLAY MODULE INFOTAINMENT INSTRUMENT PANEL JUNCTION BLOCK LOGIC LT GRN/DK BLU WIRE LT GRN/WHT WIRE LVDS MUTE NETWORK NETWORK BUS 10 NETWORK BUS 5 POWER DISTRIBUTION SYSTEM RADIO CONTROLS RADIO PRESETS STEERING WHEEL CONTROLS SWITCH RADIO VOLUME STEERING WHEEL CONTROLS SWITCH RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT STEERING WHEEL CONTROLS SWITCH SEATS SYSTEM SEEK DOWN SEEK UP SOUND SYSTEMS SOURCE STEERING WHEEL AIR BAG COIL STR WHL CNTRL FUSE UP SIG USB USB/OBS DET FUSE VIDEO SYSTEM VOICE VOL (-) WHT WIRE WHT/BLU WIRE WHT/YEL WIRE YEL WIRE YEL/BLU WIRE

1-VT 2-VT 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 MICROPHONE CELLULAR PHONE NAVIGATION, DIGITAL RADIO ANTENNA COAX COMMUNICATION ENABLE COMPUTER DATA LINES SYSTEM GMLAN SERIAL DATA (+) 9 GPS GPS SIG GPS/CELL GRY/VIO WIRE GRY/YEL WIRE HUMAN MACHINE INTERFACE CONTROL MODULE (BEHIND GLOVE BOX) INFOTAINMENT DISPLAY SIG 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 SER DATA (+) 9 TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE USB USB GY USB RECEPTACLE USB SRL DATA VOICE SIG W/ DIGITAL AUDIO SYSTEM W/O REAR SEAT ENTERTAINMENT W/ REAR SEAT ENTERTAINMENT WHT/BLU WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/LT GRN WIRE WHT/VIO WIRE X-BK YEL WIRE

BASE EQUIPMENT BATT POSITIVE VOLT BATT POST VOLT BLK WIRE BLU WIRE BLU/BLK WIRE BRN/BLU WIRE COMPUTER DATA LINES SYSTEM EXCEPT BASE EQUIPMENT GRN WIRE GRN/BLK WIRE GRY/VIO WIRE HOT AT ALL TIMES INSTRUMENT PANEL JUNCTION BLOCK LEFT FRONT DOOR SPEAKER LEFT INSTRUMENT PANEL SPEAKER LEFT REAR DOOR SPEAKER LEFT REAR TRIM PANEL SPEAKER LF SPEAKER (+) (1) LH REAR SPEAKER (-) MEDIA DISC PLAYER MOST CONTROL RADIO RDO FUSE RED/VIO WIRE RF SPEAKER (+) (1) RH REAR SPEAKER (-) RIGHT FRONT DOOR SPEAKER RIGHT INSTRUMENT PANEL FUSE BLOCK RIGHT INSTRUMENT PANEL SPEAKER RIGHT REAR DOOR SPEAKER RIGHT REAR TRIM PANEL SPEAKER SERIAL DATA SIG GND W/ ENHANCED AUDIO SPEAKER SYSTEM W/ REAR SEAT ENTERTAINMENT W/O REAR SEAT ENTERTAINMENT WHT WIRE WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE