GMC Cab & Chassis Sierra 3500 HD (2008-2012) computer data lines system Wiring diagrams

4.3L 6.0L (VIN G) AUX HVAC-IGN FUSE 48 FUSE 45 AXLE SW SIG BLK WIRE BLK/WHT WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE FRONT AXLE ACTUATOR (ON FRONT AXLE ASSEMBLY) GAS DIESEL GMLAN BUS- GROUND DISTRIBUTION SYSTEM 6.0L (VIN G) 4.8L, 5.3L, 6.0L (VIN J) 6.6L 4.3L, 6.2L GRY/BLK WIRE HOT W/ RUN/CRNK RELAY ENERGIZED IGN GND INSTRUMENT PANEL CLUSTER (IPC) LOGIC PNK WIRE SER DATA TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANS IGN 1 FUSE 19 FUSE 13 TRANSFER CASE SHIFT CONTROL SWITCH (ON TOP LEFT OF TRANSFER CASE) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE

6978 2550 512 511 546 599 7066 340 AMP CTRL GND AMP FUSE 41 FUSE 38 BLK WIRE BRN WIRE BRN/WHT WIRE COAX COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GASOLINE DIESEL HOT AT ALL TIMES LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LOGIC INSIDE REARVIEW MIRROR (ISRVM) LOW REF LT BLU/BLK WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE NCA WIRE ONSTAR BUTTON ASSEMBLY ORG/ WIRE ORG/BLK WIRE RADIO RDO FUSE 42 FUSE 39 RED/WHT WIRE RF AUD+ LF AUD+ RR AUD+ LR AUD+ REM SIG TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) USB CABLE USB RECEPTACLE (IF EQUIPPED) VOICE SIG WHT WIRE YEL/BLK WIRE

AUD SIG BLK WIRE BRN WIRE BRN/WHT WIRE CELLULAR TELEPHONE MICROPHONE (IN OVERHEAD CONSOLE) CELLULAR/ NAVIGATION ANTENNA CELLULAR/ NAVIGATION, DIGITAL RADIO ANTENNA COAX COMPUTER DATA LINES SYSTEM CUT) DIGITAL AUDIO SYSTEM W/ S-BAND, TRAFFIC DIGITAL AUDIO SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DRAIN WIRE GMLAN GREEN LED GRY WIRE HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, INFO FUSE 22 KEYPAD SIG LOW REF LT BLU/BLK WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/BLK WIRE RED LED WIRE RED/WHT WIRE SHIELD SUPPLY TAN WIRE TAN/BLK WIRE VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) (BEHIND CENTER OF DASH) VOICE SIG W/ ON STAR W/ ONSTAR W/O ONSTAR W/ ONSTAR W/O S-BAND, TRAFFIC WHT WIRE YEL/BLK WIRE

AMPL CNTRL BLK WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DRAIN WIRE GMLAN GRY WIRE HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, INFRARED REF INFRARED V J/B (LOWER LEFT SIDE OF DASH) L INFRARED L SUBWFR - LF AUD + LF SPK - LR AUD + LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK WIRE PNK/BLK WIRE PPL/WHT WIRE R INFRARED R SUBWFR + REAR SEAT AUDIO (RSA) CONTROL RED/WHT WIRE REM ENABLE RF AUD + RF SPK - RIGHT I/P J/B (IN RIGHT END OF DASH) RR AUD - RSE FUSE 19 SUBWOOFER SPEAKER TAN WIRE W/ REAR SEAT ENTERTAINMENT PACKAGE WHT WIRE YEL WIRE

116 115 LR AUD- RR AUD- 118 117 LF SPK- RF SPK- 199 46 LR AUD+ RR AUD+ BLK WIRE BRN WIRE BRN/WHT WIRE COAX COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DND GASOLINE DIESEL GMLAN GRY WIRE HOT AT ALL TIMES INSIDE REARVIEW MIRROR (ISRVM) LOGIC LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE ONSTAR BUTTON ASSEMBLY RADIO RDO FUSE 42 FUSE 39 RED/WHT WIRE TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) USB CABLE USB RECEPTACLE (IF EQUIPPED) VOICE SIG YEL WIRE YEL/BLK WIRE

AUD SIG BLK WIRE BLUNT CUT) BLUTOOTH WIRELESS COMMUNICATION INTERFACE ANTENNA (IF EQUIPPED) BRN WIRE BRN/WHT WIRE CELLULAR TELEPHONE MICROPHONE (IN OVERHEAD CONSOLE) CELLULAR/ NAVIGATION ANTENNA CELLULAR/ NAVIGATION, DIGITAL RADIO RADIO ANTENNA COAX COMPUTER DATA LINES SYSTEM DIGITAL AUDIO SYSTEM W/ S-BAND, TRAFFIC DIGITAL AUDIO SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DRAIN WIRE GMLAN GREEN LED GRY WIRE HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, INFO FUSE 22 KEYPAD SIG LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE PNK WIRE PNK/BLK WIRE RED LED WIRE RED/WHT WIRE SHIELD SUPPLY TAN WIRE TAN/BLK WIRE VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) (BEHIND CENTER OF DASH) VOICE SIG W/ ON STAR W/O ONSTAR W/ ONSTAR W/O S-BAND, TRAFFIC YEL WIRE YEL/BLK WIRE

18 19 PNK WIRE BLK WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRAIN WIRE GMLAN GRY WIRE HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, INFRARED REF INFRARED V L INFRARED LT BLU WIRE LT GRN WIRE NCA WIRE ORG/BLK WIRE PNK WIRE PNK/BLK WIRE PPL/WHT WIRE R INFRARED REAR SEAT AUDIO (RSA) CONTROL RED/WHT WIRE RIGHT I/P J/B (IN RIGHT END OF DASH) RSE FUSE 19 TAN WIRE W/ REAR SEAT ENTERTAINMENT PACKAGE W/ S-BAND DIGITAL AUDIO SYSTEM/VEHICLE COMMUNICATION SYSTEM YEL WIRE

2550 512 511 546 599 7066 340 GND RF AUD+ LF AUD+ RR AUD+ LR AUD+ REM SIG AMP FUSE 41 FUSE 38 BLK WIRE BRN WIRE BRN/WHT WIRE COAX COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GASOLINE DIESEL HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, INFO FUSE 22 LOW REF LT BLU/BLK WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE NCA WIRE ONSTAR BUTTON ASSEMBLY LOGIC INSIDE REARVIEW MIRROR (ISRVM) ORG/BLK WIRE POWER DISTRIBUTION SYSTEM RADIO RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) RSE FUSE 19 TAN WIRE USB CABLE USB RECEPTACLE (IF EQUIPPED) VOICE SIG W/ ONSTAR W/ REAR SEAT ENTERTAINMENT PACKAGE WHT WIRE YEL/BLK WIRE

AUD SIG BLK WIRE BLUNT CUT) BRN WIRE BRN/WHT WIRE CELLULAR TELEPHONE MICROPHONE (IN OVERHEAD CONSOLE) CELLULAR/ NAVIGATION ANTENNA CELLULAR/ NAVIGATION, DIGITAL RADIO ANTENNA COAX COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DRAIN WIRE GMLAN GREEN LED GRY WIRE KEYPAD SIG LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LOW REF LT BLU/BLK WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE NCA WIRE ORG/BLK WIRE PNK WIRE PNK/BLK WIRE RED LED WIRE RED/WHT WIRE SHIELD SUPPLY TAN WIRE TAN/BLK WIRE VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) (BEHIND CENTER OF DASH) VOICE SIG W/ ONSTAR WHT WIRE YEL/BLK WIRE

AMPLF+ BLK WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DRAIN WIRE F CENTR SPK- GMLAN GRY WIRE INFRARED REF INFRARED V L INFRARED L SUBWFR - LEFT I/P J/B (LOWER LEFT SIDE OF DASH) LF AUD + LF SPK - LR AUD + LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MICRO SIG + NCA WIRE ORG/BLK WIRE PNK WIRE PNK/BLK WIRE PPL PPL/WHT WIRE R INFRARED R SUBWFR + REAR SEAT AUDIO (RSA) CONTROL RED/WHT WIRE RF AUD + RF SPK - RR AUD - SUBWOOFER SPEAKER SYSTEM TAN WIRE WHT WIRE YEL WIRE YEL/BLK WIRE