GMC Savana Camper Special G3500 (1996-2011) computer data lines system Wiring diagrams

BLK WIRE BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) CLASS 2 CLASS 2 (PCM) DATA COMPUTER DATA LINES SYSTEM CRUISE IND DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE GRN WIRE GROUND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN, START IGN IGN E FUSE 22 INSTRUMENT PANEL CLUSTER LT BLU WIRE NCA WIRE ON CRUISE CONTROL ON/OFF SWITCH OFF ON OFF ORG/BLK WIRE PCM IGN 1 FUSE 38 PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL VSS LOW RED/WHT WIRE RESUME/ ACCEL RESUME/ACCEL SET/ COAST STOP LP FUSE 7 STOP/ CHMSL FUSE 8 STOPLAMP SWITCH (ABOVE BRAKE PEDAL) THROTTLE ACTUATOR CONTROL (TAC) MODULE (AT LEFT REAR OF ENGINE COMPARTMENT) TURN SIGNAL/ MULTIFUNCTION SWITCH UART SERIAL DATA UART SERIAL DATA UART SERIAL DATA UART SERIAL DATA SERIAL DATA 14 58 UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (ON RIGHT SIDE OF TRANSMISSION) VSS HIGH WHT WIRE YEL WIRE

BLK WIRE BLU WIRE BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) CARGO/ PASSENGER CLASS 2 CRUISE IND CLASS 2 (PCM) DATA COMPUTER DATA LINES SYSTEM CRUISE CONTROL MODULE (NEAR BRAKE FLUID RESERVOIR) CUTAWAY DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRN WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN, START IGN IGN E FUSE 22 INSTRUMENT PANEL CLUSTER LT BLU WIRE LT BLU/BLK WIRE NCA WIRE ON CRUISE CONTROL ON/OFF SWITCH OFF ON OFF PCM IGN 1 FUSE 38 PNK 17 (OR 1320) WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN ENGINE COMPT, ON LEFT INNER FENDER) PPL PPL VSS LOW RED/WHT WIRE RESUME/ ACCEL RESUME/ACCEL SERIAL DATA SET/ COAST SPEED SIGNAL AUTO CRUISE INHIBIT SIG VSS HIGH 13 37 STOP LP FUSE 7 STOP/ CHMSL FUSE 8 STOPLAMP SWITCH (ABOVE BRAKE PEDAL) TURN SIGNAL/ MULTIFUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (ON RIGHT SIDE OF TRANSMISSION) WHT (OR LT BLU) WIRE WHT WIRE YEL WIRE

40 21 STOPLAMP SW INPUT IGNITION 44 57 22 54 2 4 6 HI SPD GMLAN + HI SPD GMLAN - TCC BRK SW VSS 61 34 10 CRUISE ON INPUT SET/COAST SIG RESUME/ACCEL SIG ANTI-LOCK BRAKE SYSTEM BLK WIRE BLK/WHT WIRE BODY FUSE BLOCK (UNDER LEFT FRONT SEAT) CLASS 2 CLASS 2 (PCM) DATA COMPUTER DATA LINES SYSTEM CRUISE IND DK BLU WIRE ECM/TCM GLO PLUG MDL FUSE 38 ENGINE CONTROL MODULE (ECM) FOH/ECM TCM BATT FUSE 2 GROUND GROUND GROUND 1551 1551 GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN, START IGN IGN E FUSE 22 INSTRUMENT PANEL CLUSTER LT BLU WIRE NCA WIRE ON CRUISE CONTROL ON/OFF SWITCH OFF ON OFF PNK WIRE PPL PPL 420 1827 PPL VSS LOW RED/WHT WIRE RESUME/ ACCEL RESUME/ACCEL SET/ COAST STOP LP FUSE 7 STOP/ CHMSL FUSE 8 STOPLAMP SWITCH (ABOVE BRAKE PEDAL) TAN WIRE TAN/BLK WIRE TRANSMISSION CONTROL MODULE (TCM) (LEFT FRONT CORNER OF ENGINE COMPT) TURN SIGNAL/ MULTIFUNCTION SWITCH UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (ON RIGHT SIDE OF TRANSMISSION) WHT WIRE YEL WIRE YEL/BLK WIRE

12 13 34 28 27 25 8 65 43 44 59 36 63 66 46 PRESS SENS LOW REF 19 21 69 14 71 CLUTCH CTRL CLUTCH CTRL SPEED SIG 21 22 58 4 24 40 SENS SIG LOW REF 6.6L 4.3L 4.8L, 5.3L, 6.0L A/C CMPRSR FUSE 18 A/C CMPRSR RELAY 40 A/C COMPRESSOR CLUTCH A/C REFRIGERANT PRESSURE SENSOR A/C SERIAL REQUEST DATA SIG BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN/WHT WIRE CLUTCH RLY CTRL COMPUTER DATA LINES SYSTEM COOLING FAN ASSEMBLY (6.6L) (BEHIND RADIATOR) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR FAN CLTCH (EV) FUSE 63 FAN LOGIC CLTCH (D) RELAY 50 (6.6L) GMLAN - GMLAN + GMLAN DATA GRY WIRE HOT AT ALL TIMES HOT W/ PWR/TRN RELAY 49 ENERGIZED LOW REF LT BLU WIRE LT GRN WIRE OF ENGINE) ORG/BLK WIRE REF SIDE OF ENGINE COMPT) TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT W/ AUXILIARY FUEL FIRED HEATER W/O AUXILIARY FUEL FIRED HEATER WHT WIRE WHT/BLK WIRE YEL WIRE

A/C LOW PRESSURE SWITCH (ON SIDE OF ACCUMULATOR) AUXILIARY AIR TEMPERATURE ACTUATOR AUXILIARY BLOWER MOTOR (ON AUXILIARY HVAC) AUXILIARY BLOWER MOTOR MEDIUM SPEED RELAY AUXILIARY BLOWER MOTOR RESISTOR ASSEMBLY (ON AUXILIARY AUXILIARY HVAC MODULE) AUXILIARY MODE ACTUATOR BLK WIRE BLOWER MOTOR BREAKOUT) BREAKOUT) BREAKOUT) (W/ RV UPFITTER: IN BODY HARNESS, BRN WIRE COMPUTER DATA LINES SYSTEM COOLANT HEATER BLOWER MOTOR COOLANT HEATER COMBUSTION SENSOR COOLANT HEATER CONTROL MODULE COOLANT HEATER GLOW PLUG COOLANT HEATER OVERHEAT TEMPERATURE SENSOR COOLANT HEATER AIR TEMPERATURE SENSOR COOLANT HEATER TEMPERATURE SENSOR DK BLU WIRE DK BLU/LT GRN WIRE FOH MDL (D) FUSE 35 FROM AUXILIARY BLOWER MOTOR CONNECTOR BREAKOUT) FUEL PUMP GND SERIAL - SERIAL + SERIAL - SERIAL + GRN/RED WIRE GRY WIRE HEATER MOTOR HOT AT ALL TIMES LOGIC LOW REF LT BLU WIRE LT GRN WIRE ORG/ WIRE PROVISIONAL RED/WHT WIRE SERIAL DATA TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) VOLT VOLT GND WHT WIRE YEL WIRE

12 13 34 28 27 25 8 65 43 44 59 36 63 66 46 PRESS SENS LOW REF 19 21 69 14 71 CLUTCH CTRL CLUTCH CTRL SPEED SIG 21 22 58 4 24 40 SENS SIG LOW REF 6.6L 4.3L 4.8L, 5.3L, 6.0L A/C CMPRSR FUSE 18 A/C CMPRSR RELAY 40 A/C COMPRESSOR CLUTCH A/C REFRIGERANT PRESSURE SENSOR A/C SERIAL REQUEST DATA SIG BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND LOWER RIGHT SIDE OF DASH) BRN/WHT WIRE CLUTCH RLY CTRL COMPUTER DATA LINES SYSTEM COOLING FAN ASSEMBLY (6.6L) (BEHIND RADIATOR) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LEFT SIDE OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR FAN CLTCH (EV) FUSE 63 FAN LOGIC CLTCH (D) RELAY 50 (6.6L) GMLAN - GMLAN + GMLAN DATA GRY WIRE HOT AT ALL TIMES HOT W/ PWR/TRN RELAY 49 ENERGIZED LOW REF LT BLU WIRE LT GRN WIRE OF ENGINE) ORG/BLK WIRE REF SIDE OF ENGINE COMPT) TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (ON LEFT W/ AUXILIARY FUEL FIRED HEATER W/O AUXILIARY FUEL FIRED HEATER WHT WIRE WHT/BLK WIRE YEL WIRE

ANTENNA ANTENNA IN BLK WIRE BLK/WHT WIRE BLUNT CUT) CLASS 2 DATA COAX COMPUTER DATA LINES SYSTEM CUTAWAY UPFITTER DK BLU WIRE DK GRN WIRE HOT AT ALL TIMES LEFT FRONT DOOR SPEAKER LEFT REAR DOOR SPEAKER (IF EQUIPPED) LEFT REAR SPEAKER LF SPEAKER (+) LF SPEAKER (-) RR SPEAKER (-) RR SPEAKER (+) GROUND BATTERY LR SPEAKER + LR SPEAKER - RF SPEAKER - RF SPEAKER + LT BLU WIRE NOT USED ORG/ WIRE PASSENGER/ CARGO RADIO RADIO BAT FUSE 1 RED/WHT WIRE RIGHT FRONT DOOR SPEAKER RIGHT REAR DOOR SPEAKER (IF EQUIPPED) RIGHT REAR SPEAKER TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPTARTMENT) WHT WIRE

2500 2501 COMPUTER DATA LINES SYSTEM 38 37 39 2500 2501 776 HI SPD SER DATA (+) HI SPD SER DATA (-) SW SIG P 43 44 66 46 HI SPD SER DATA (+) HI SPD SER DATA (-) 6.6L 4.8L, 5.3L, 6.0L 4.3L AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION (4.3L, 5.3L) BLK WIRE BLK/WHT WIRE BRK SIG COMPUTER DATA LINES SYSTEM CONTROL SOLENOID ENGINE CONTROL MODULE (ECM) GM LAN HI SPD GRY WIRE HI SPD SER COMPUTER DATA LINES SYSTEM DATA - HI SPD SER DATA + HOT W/ RUN/CRANK RELAY ENERGIZED BRK SW FUSE 13 INTERNAL MODE SWITCH (IMS) LT BLU WIRE LT BLU/WHT WIRE MODULE (TCM) PARK/NEUTRAL POSITION (PNP) SWITCH PNK WIRE STOP LAMP SWITCH (BEHIND LEFT SIDE OF DASH, ABOVE BRAKE PEDAL) TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TOWARDS INSTRUMENT PANEL CLUSTER) TRANSMISSION CONTROL TRANSMISSION CONTROL MODULE (TCM) UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) VALVE ASSEMBLY WHT WIRE

AIR BAG OFF IND AIR BAG ON IND BLK/BLU WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CONNECTOR BREAKOUT) PNK WIRE DK BLU/WHT WIRE DK GRN WIRE DRIVER SEAT BELT SWITCH DRIVER SEAT BELT BUCKLE FRT PRK LAMPS FUSE 4 GRY WIRE HEAVY DUTY HOT AT ALL TIMES BODY FUSE AIR BAG/ AOS BLOCK (UNDER FUSE 10 LEFT FRONT SEAT) HOT W/ PRK LAMPS RELAY HOT W/ RUN/ CRNK RELAY 15 ENERGIZED AIR BAG FUSE 28 HOT W/ RUN/ CRNK RELAY 15 ENERGIZED IPC FUSE 10 INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (SDM) (UNDER LEFT FRONT SEAT) INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (AT TOP OF STEERING COLUMN) LIGHT DUTY LO CTRL HI CTRL HI CTRL LO CTRL L LO CTRL L HI CTRL R HI CTRL R LO CTRL LOGIC LOW REFERENCE LOW SPD BATT GROUND LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE PASSENGER SEAT BELT BUCKLE (W/O MANUAL SUPPRESSION SWITCH, RV/UPFITTER) PASSENGER SEAT BELT SWITCH PNK 1 1 1 1 1 1 1 1 1 1 1 1 LO CTRL HI CTRL HI CTRL LO CTRL WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL/WHT WIRE RED WIRE RED/ WHT WIRE RED/WHT WIRE ROLLOVER HI SIG L SEAT BELT SW R SEAT BELT SW SENS SIG SHORTING BAR STAGE 1 INFLATABLE RESTRAINT STEERING WHEEL MODULE (IN STEERING WHEEL) STAGE 2 SUPPRESSION IND CTRL SW SIG TAN WIRE TAN/BLK WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT) W/ MANUAL SUPPRESSION SWITCH W/O MANUAL SUPPRESSION SWITCH, RV/UPFITTER WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

AIR BAG IND BLK/WHT WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE GRN DK WIRE GRN WIRE GRY WIRE HEAVY DUTY HI SIG IGN INFLATABLE RESTRAINT FRONT END SENSOR (ON LOWER CENTER OF RADIATOR SUPPORT) INSTRUMENT PANEL CLUSTER (IPC) SEAT BELT IND LEFT FRONT INFLATABLE RESTRAINT LEFT FRONT SEAT BELT PRETENSIONER (LIGHT DUTY) LIGHT DUTY LO SPD LOGIC LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE OFF IND ON IND. ORG/ WIRE ORG/BLK WIRE PASSENGER PASSENGER AIR BAG IND PASSENGER SEAT BELT IND PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL/WHT WIRE RED/WHT WIRE RIGHT FRONT INFLATABLE RESTRAINT ROOF RAIL MODULE RIGHT REAR INFLATABLE RESTRAINT ROOF RAIL MODULE ROOF RAIL MODULE (LEFT SIDE OF HEADLINER) SHORTING BAR STAGE 1 STAGE 1 INFLATABLE RESTRAINT I/P MODULE (BEHIND RIGHT SIDE OF DASH) STAGE 2 INFLATABLE RESTRAINT I/P MODULE (LIGHT DUTY) (BEHIND RIGHT SIDE OF DASH) TAN/BLK WIRE TAN/WHT WIRE W/ REAR HINGED DOOR W/ REAR SLIDING DOOR WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE