Chevrolet Silverado 3500 HD (2007-2012) serial data Wiring diagrams

10 11 PNK SENS SIG WIRE 16 5 SER DATA RWD SIG 9 10 PPL FWD CTRL RWD CTRL BLK WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER MEMORY/HEATED SEAT SWITCH DRIVER'S MEMORY SEAT CIRCUIT DSM FUSE 25 ELECTRONIC ADJUSTABLE PEDAL (EAP) ASSEMBLY (UNDER LEFT SIDE OF DASH) EXIT GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, I/P MULTI-FUNCTION SWITCH LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LOGIC DRIVER DOOR LOCK/WINDOW SWITCH LOW REF MEMORY SEAT MODULE (MSM) (UNDER FRONT OF DRIVER'S SEAT) ORG/ WIRE ORG/BLK WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL SW SIG PPL/WHT WIRE RED/WHT WIRE SERIAL DATA SW SIG TAN WIRE YEL WIRE YEL/BLK WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 AIR TMP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 B(+) A/C ON AIR TEMP RF SUNLD AMB AIR TMP GMLAN L AMBIENT AIR TEMPERATURE SENSOR (ON LEFT SIDE OF RADIATOR SUPPORT) AMBIENT LIGHT/SUNLOAD SENSOR ASSEMBLY (TOP CENTER OF DASH) AUTO BATT POS VOLT BLK WIRE BLK/WHT WIRE BREAKOUT) BRN WIRE COLNT LVL GROUND LOW REF COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ENGINE COOLANT LEVEL SWITCH (6.6L) (ON BOTTOM OF SURGE TANK) EVAPORATOR TEMPERATURE SENSOR (ON HVAC ASSEMBLY) FAN DN FAN UP FRESH AIR FRNT DFG FRT DEF A/C IND FSH AIR GROUND GROUND DISTRIBUTION SYSTEM GROUND IGN 3 REAR DEFOG GRY WIRE GRY/BLK WIRE HVAC CONTROL MODULE INSTRUMENT PANEL CLUSTER (IPC) DRIVER INFORMATION CENTER (DIC) DISPLAY LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LEFT SUNLOAD SENSOR LEFT TEMP CONTROL LF SUNLD L AIR TMP R AIR TMP LOGIC LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MODE DN MODE UP MTR SPD CTRL OFF ORG/ WIRE POWER DISTRIBUTION SYSTEM DEFOGGER SYSTEM PPL PPL/WHT WIRE R AIR TMP AIR TMP R AIR TMP TEMP SENS MODE CTRL L AIR TMP RECIR CTRL R AIR TMP REAR DFG RECIR RECIRC RED WIRE RED/WHT WIRE RER DEF RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) RIGHT SUNLOAD SENSOR RIGHT TEMP CONTROL SERIAL DATA TAN WIRE UPPER LEFT AIR TEMPERATURE SENSOR (UNDER UPPER LEFT SIDE OF DASH) UPPER RIGHT AIR TEMPERATURE SENSOR (UNDER UPPER RIGHT SIDE OF DASH) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

19 6 ACCESSORY WAKEUP SERIAL DATA 2 3 LOW SER DATA HI SER DATA 4.3L 5 4 12 13 HI SPD GMLAN (+) HI SPD GMLAN (-) HI SPD GMLAN (-) HI SPD GMLAN (+) 6 SPEED A/T 6.0L (VIN K) W/O TRAILER BRAKE 6.6L EXCEPT 4.3L, 6.6L 8 19 HIGH SPEED GMLAN SERIAL DATA BUS (+) SER DATA COMM ENABLE ACCESSORY WAKEUP SERIAL DATA AUTOMATIC TRANSMISSION BLK WIRE BODY CONTROL MODULE (BCM) (LOWER LEFT SIDE OF DASH) CAN DATA BUS HIGH CAN DATA BUS LOW COMM ENABLE COMM ENABLE SERIAL DATA DATA LINK RESISTOR (IN CHASSIS HARNESS, ON LEFT REAR CHASSIS CROSS MEMBER) DK BLU WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT SIDE OF FRAME ASSEMBLY) ELECTRONIC COMPASS MODULE ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) EXCEPT 6.6L 6.6L EXCEPT GAS 4.3L, 6.0L (VIN K) FUEL PUMP/ TRAILER BRAKE CONTROL MODULE (REAR FRAME, NEAR SPARE TIRE MOUNT) GLOW PLUG CONTROL MODULE (GPCM) (6.6L) (TOP LEFT REAR OF ENGINE) HI SPD GMLAN HI SPD GMLAN SERIAL DATA HIGH SPEED GMLAN SERIAL DATA BUS + LEFT I/P BLOCK JUNCTION (LOWER LEFT SIDE OF DASH) LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LINEAR INTERCONNECT NETWORK BUS LT BLU WIRE LT GRN/BLK WIRE NETWORK BUS SERIAL DATA SERIAL DATA COMM ENABLE TAN TAN/BLK WIRE TAN WIRE TAN/BLK TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TERMINATOR TRANSMISSION CONTROL MODULE VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) (BEHIND CENTER OF DASH) W/ 10 SERIES W/ HYDRAULIC BRAKES W/ ONSTAR W/ PTO W/ TRAILER BRAKE W/ TWO SPEED TRANSFER CASE W/O 10 SERIES W/O INTEGRATED TRAILER BRAKE CONTROL W/O ONSTAR W/O PTO W/O TRAILER BRAKE W/O TWO SPEED TRANSFER CASE YEL WIRE YEL/BLK WIRE

2500 2501 COMPUTER DATA LINES SYSTEM 66 46 DATA BUS + DATA BUS - BLK WIRE BLK/WHT WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY ECT SENS SIG ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, NEAR FAN SHROUD) ENGINE COOLANT LEVEL SWITCH (ON BOTTOM OF SURGE TANK) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (TOP FRONT CENTER OF ENGINE) ENGINE COOLING FAN (FRONT CENTER OF ENGINE COMPT) FAN FUSE 68 FAN RLY RELAY GMLAN L GRY WIRE HOT AT ALL TIMES HVAC CONTROL MODULE INSTRUMENT PANEL CLUSTER (IPC) LOGIC LOGIC B+ GND LOW REF LT GRN WIRE MANUAL A/C AUTOMATIC A/C RLY SPD SIG SERIAL DATA SPD SIG SW SIG TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

1 2 3 4 5 6 6206 2426 2080 LOW REF LOW REF LOW REF PNK WIRE 1066 1065 5286 UP SW SIG FWD SW SIG FWD SIG 1067 1064 DOWN SW SIG RWD SW SIG 1518 1519 1522 1269 RR VERT UP SW FRT VERT UP SW HORZ FWD SIG RECLN FWD SIG 2482 2435 LOW REF LOW REF PNK WIRE ADJUSTABLE PEDALS CIRCUIT COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DOWN DRIVER DOOR LOCK/ WINDOW SWITCH DRIVER MEMORY/HEATED SEAT SWITCH DRIVER SEAT ADJUSTER SWITCH DRIVER SEAT LUMBAR SWITCH EXIT GRY WIRE GRY/BLK WIRE I/P MULTI-FUNCTION SWITCH (W/ ADJUSTABLE PEDAL) LEFT I/P JUNCTION BLOCK (LOWER LEFT SIDE OF DASH) LH SEAT SIG LOGIC LT BLU WIRE LT GRN WIRE MEMORY SEAT MODULE (UNDER FRONT OF DRIVER'S SEAT) ORG/ WIRE PPL PPL/WHT WIRE RH SEAT SIG RWD RWD SIG SEATS SYSTEM SERIAL DATA SW SIG TAN WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

7 3 SUPPLY VOLT LOW REF BATTERY BLK WIRE COMPUTER DATA LINES SYSTEM DDM FUSE DK GRN WIRE DRIVER DOOR SWITCH (DDS) FUSE BLOCK (I/P) (LEFT SIDE OF DASH) GROUND HOT AT ALL TIMES HVAC CONTROL MODULE JUNCTION BLOCK (RIGHT I/P) (IN RIGHT END OF DASH) LOW REF OUTSIDE REARVIEW MIRROR- DRIVER OUTSIDE REARVIEW MIRROR- PASSENGER PASSENGER DOOR SWITCH (PDS) PDM FUSE POWER DISTRIBUTION SYSTEM R DEF REAR DEFOG SWITCH RED WIRE RED/WHT WIRE SERIAL DATA SUPPLY VOLT WHT WIRE

16 31 39 24 FUEL LVL SIG LO REF 4.3L 4.3L 6.0L (VIN G) 6.0L (VIN J) 5 13 9 LOW REF SW SIG SER DATA 58 28 FUEL LVL SIG LO REF 6.6L 4.8L, 5.3L, 6.2L 9 41 OIL LVL SIG LO REF 9 5 4 13 SER DATA LOW REF SW SIG SW SIG BLK WIRE BLK/WHT WIRE BRN WIRE COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DRIVER DOOR LATCH ASSEMBLY (W/O BUCKET SEATS, POWER MIRRORS) DRIVER DOOR LOCK/WINDOW SWITCH ENGINE OIL LEVEL (EOL) SWITCH (LEFT SIDE OF ENGINE OIL PAN) EXCEPT HYBRID HYBRID FUEL LVL SIG GRY WIRE GRY/BLK WIRE HYBRID EXCEPT HYBRID I/P FUSE BLOCK (LEFT SIDE OF DASH, INFORMATION VEHICLE LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE OIL PRESS SIG PASSENGER DOOR LOCK/WINDOW SWITCH PERSONALI- PNK WIRE PPL PPL 44 9 64 37 RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) SERIAL DATA SET/ RESET SYSTEM TAN/ BLK WIRE TAN/BLK WIRE TAN/WHT WIRE TRIP/FUEL W/ 10 SERIES W/ DUAL FUEL TANK W/ ELECTRONIC DOOR LOCK CONTROL W/ POWER WINDOWS W/O 10 SERIES YEL WIRE ZATION

4 58 22 21 30 46 LOW REF ECT SENS SIG 6.0L 6.6L 4.8L, 5.3L,, 6.2L 4.3L AIR TEMPERATURE ACTUATOR (TOP MIDDLE OF HVAC MODULE) BLK WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT) ENGINE COOLING FAN (6.6L) (FRONT CENTER OF ENGINE COMPT) EXCEPT 6.0L EXCEPT 6.6L 6.6L FAN FUSE 68 FAN RELAY GRY WIRE HEAD HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER (IPC) LOGIC LOGIC B+ GND LT BLU/BLK WIRE LT GRN WIRE MODE ACTUATOR (LEFT END OF HVAC MODULE) LOGIC NEAR FAN SHROUD) ORG/BLK WIRE RECIRCULATION ACTUATOR (FRONT A/C) (TOP RIGHT SIDE OF HVAC MODULE) SENS SIG FAN RLY CTRL PWRTRN RLY CTRL FAN RLY CTRL RLY SPD SIG LOW REF SPD SIG SERIAL DATA TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

1 2 4 10 5 7 RETRACT CTRL EXTEND CTRL SENS SIG LOW REF SENS SIG 2 6 1 3 7 POSITION CTRL MTR COMM POSITION CTRL LOW REF SPLY VOLT 4 6 B+ GND BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE GRY/BLK WIRE HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PASSENGER DOOR LOCK/ WINDOW SWITCH PASSENGER OUTSIDE REARVIEW MIRROR PDM FUSE 9 POWER DISTRIBUTION SYSTEM PPL RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) SERIAL DATA WHT WIRE YEL WIRE

1 2 4 10 5 7 RETRACT CTRL EXTEND CTRL SENS SIG LOW REF SENS SIG 2 6 1 3 7 POSITION CTRL MTR COMM POSITION CTRL LOW REF SPLY VOLT 4 6 B+ GND BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE GRY/BLK WIRE HOT AT ALL TIMES I/P FUSE BLOCK (LEFT SIDE OF DASH, LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE ORG/ WIRE ORG/BLK WIRE PASSENGER DOOR LOCK/ WINDOW SWITCH PASSENGER OUTSIDE REARVIEW MIRROR PDM FUSE 9 POWER DISTRIBUTION SYSTEM PPL RED/WHT WIRE RIGHT I/P JUNCTION BLOCK (IN RIGHT END OF DASH) SERIAL DATA WHT WIRE YEL WIRE