GMC Savana Camper Special G3500 (1996-2011) Computer data lines circuit

2 3 SERIAL DATA SERIAL DATA 5.3L 6.6L 4.8L, 5.3L, 6.0L 4.3L ACC WAKE UP SERIAL DATA 11 15 19 7 6 38 37 5985 2501 2500 2500 2501 2500 2501 ACC WAKE-UP SERIAL DATA BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER CHIME MODULE (BEHIND LEFT CENTER OF DASH) CONTROL EXCEPT 6.6L W/O ACTIVE BRAKE CONTROL COOLANT HEATER (6.6L) DATA BUS+ DATA BUS+ DATA BUS- DATA BUS- DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DATA LINK RESISTOR DK BLU WIRE DK GRN WIRE ELECTRONIC BRAKE CONTROL MODULE (EBCM) ELECTRONIC CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) EXCEPT 5.3L EXCEPT 6.6L W/ ACTIVE BRAKE FUEL PUMP FLOW CONTROL MODULE (5.3L) (AT REAR OF GLOW PLUG CONTROL MODULE (GPCM) (6.6L) HOT AT ALL TIMES INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (UNDER LEFT FRONT SEAT) INSTRUMENT PANEL CLUSTER (IPC) LIGHT DUTY W/O RECREATIONAL VEHICLE, UPFITTER SALES PACKAGE LTR/DLC FUSE 38 RADIO RED WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (IF EQUIPPED) (BEHIND CENTER OF DASH) SERIAL DATA SPLICE PACK TAN WIRE TAN/BLK WIRE TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) UNDERHOOD PASS THROUGH GROMMET) VEHICLE, ATTACHED TO LEFT REAR FRAME RAIL) W/ AUXILIARY FUEL FIRED HEATER W/ RADIO PROVISIONS W/O AUXILIARY FUEL FIRED HEATER W/O RADIO PROVISIONS WHT WIRE

2 3 DATA BUS (+) DATA BUS (-) 2 3 SERIAL DATA SERIAL DATA 5 4 6 7 157 147 167 177 DATA BUS (+) DATA BUS (-) DATA BUS (-) DATA BUS (+) 6 5 DATA BUS (-) DATA BUS (+) 6.6L 4.8L, 5.3L, 6.0L 4.3L ACC WAKE UP SERIAL DATA DATA BUS (+) DATA BUS (-) BLK/WHT WIRE CHIME MODULE (BEHIND LEFT CENTER OF DASH) CUTAWAY DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DATA LINK RESISTOR DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) HOT AT ALL TIMES INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (UNDER LEFT FRONT SEAT) INSTRUMENT PANEL CLUSTER (IPC) LIGHT DUTY W/O RECREATIONAL VEHICLE, UPFITTER SALES PACKAGE LT GRN WIRE LTR/DLC FUSE 73 NITROGEN OXIDES SENSOR 1 NITROGEN OXIDES SENSOR 2 RADIO RED WIRE RED/WHT WIRE REDUCTANT SENSOR MODULE REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (IF EQUIPPED) (BEHIND CENTER OF DASH) SERIAL DATA SPLICE PACK TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ RADIO PROVISIONS W/O RADIO PROVISIONS WHT WIRE

17 16 19 DATA BUS (-) DATA BUS (+) DATA ENABLE 17 21 22 7 6 DATA BUS (-) DATA BUS (+) DATA BUS (-) DATA BUS (+) DATA BUS (-) 19 26 DATA BUS (-) DATA BUS (+) 23 36 37 24 12 2 3 13 DATA BUS (-) DATA BUS (+) DATA BUS (+) DATA BUS (-) 25 18 DATA BUS (+) DATA BUS (-) 4.3L 4.3L/ 5.3L 4.8L 6.0L 5.3L 6.6L 6.6L 9 8 10 DATA BUS (-) DATA BUS (+) SERIAL DATA ACC WAKE UP SERIAL DATA 11 15 19 7 6 38 37 ACC WAKE UP SERIAL DATA PNK WIRE ACC WAKE-UP SERIAL DATA AUTOMATIC TRANSMISSION (6 SPEED A/T) BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE CONTROL SOLENOID VALUE ASSEMBLY COOLANT HEATER (6.6L, W/ FUEL FIRED AUXILIARY HEATER) DATA BUS - DATA BUS - DATA BUS+ DATA BUS+ DATA BUS- DATA BUS- DATA ENABLE DATA BUS (+) DATA BUS (-) DATA BUS (-) DATA BUS (+) DK BLU WIRE DK GRN WIRE EXCEPT 4.3L EXCEPT 5.3L EXCEPT W/O ACTIVE BRAKE CONTROL 6.6L GLOW PLUG CONTROL MODULE (GPCM) (LEFT REAR OF ENGINE) IGN IGN DATA BUS (+) DATA BUS (-) LT BLU WIRE OF DASH) TAN WIRE TAN/BLK WIRE TRANSMISSION CONTROL MODULE (TCM) (4 SPEED A/T) W/ ACTIVE BRAKE CONTROL W/ FUEL W/O FUEL EXCEPT FIRED FIRED 4.3L AUXILIARY AUXILIARY HEATER HEATER W/ FUEL W/O FUEL FIRED FIRED AUXILIARY AUXILIARY HEATER 4.3L HEATER W/O ACTIVE BRAKE CONTROL W/ ACTIVE BRAKE CONTROL