Chevrolet Chevy Express H2500 (2003-2003) hvac control assembly Wiring diagrams

A/C COMPRESSOR CLUTCH A/C FUSE 32 A/C HIGH PRESSURE SWITCH (REAR OF A/C A/C LOW PRESSURE SWITCH (ON SIDE OF A/C RELAY 54 ACCUMULATOR) BLK WIRE BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) BRN WIRE CLUTCH RLY CTRL COMPRESSOR) DEF HEAT/DEF DK GRN WIRE DK GRN/WHT WIRE HEAT VENT BI-LEV HOT AT ALL TIMES HOT IN RUN HVAC FUSE 10 HOT IN RUN OR START HVAC CONTROL ASSEMBLY IGN E FUSE 22 LOW PRESS SIG LT GRN WIRE OFF MAX NORM POWERTRAIN CONTROL MODULE (PCM) (ON LEFT FRONT INNER FENDER) REQUEST SIG UNDERHOOD FUSE BLOCK (ON LEFT SIDE OF ENGINE COMPT)

BLK WIRE BODY FUSE BLOCK (ON LEFT LOWER KICK PANEL) BRN WIRE DRIVER OUTSIDE REARVIEW MIRROR DRIVER OUTSIDE REAR- VIEW MIRROR GROUND HOT AT ALL TIMES HOT IN HTD MIR DEFOG FUSE 12 HVAC 1 FUSE 9 HVAC CONTROL ASSEMBLY LEFT REAR WINDOW DEFOG GRID RIGHT REAR WINDOW DEFOG GRID LOGIC IGN 3 VOLTAGE NCA WIRE PPL PPL R. DEF INDICATOR REAR WINDOW DEFOG SWITCH (DE-ENERGIZE AFTER TIME DELAY) RED WIRE RR DEF/ HTD MIR FUSE 8 RUN WIRE SPLICE PACK WHT WIRE

A/T SHIFT LOCK CONTROL SOLENOID AIR TEMPERATURE ACTUATOR AUXILIARY POWER OUTLET AUXILIARY RELAY 24 BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) BODY FUSE BLOCK CARGO UNLK RELAY 27 CTSY LP RELAY 26 CIGAR LIGHTER DATA LINK CONNECTOR (DLC) DOOR LKS RELAY 30 DRV UNLK RELAY 28 HAZARD SWITCH HEADLAMP DIMMER SWITCH HEADLAMP, PANEL DIMMER SWITCH WINDSHIELD WIPER MOTOR HVAC CONTROL ASSEMBLY IGNITION KEY ALARM SWITCH INSIDE REARVIEW MIRROR INSTRUMENT PANEL CLUSTER PASS UNLK RELAY 31 RADIO RR DEFOG RELAY 25 TAN WIRE TOW/HAUL SWITCH TRAILER WIRING (BLUNT CUT) TURN SIGNAL/ HAZARD FLASHER MODULE TURN SIGNAL/ MULTIFUNCTION SWITCH W/ GLOBAL POSITIONING SYSTEM (GPS) W/ HEATED OUTSIDE MIRRORS, REAR DEFOGGER WINDSHIELD WASHER FLUID PUMP WINDSHIELD WIPER/WASHER SWITCH WND RAP RELAY 23

AIR TEMPERATURE ACTUATOR (BEHIND RIGHT SIDE OF DASH) AUXILIARY BLOWER MOTOR (IF EQUIPPED) AUXILIARY BLOWER MOTOR RESISTOR AUXILIARY BLOWER MOTOR SWITCH (IF EQUIPPED) BLK WIRE BLOW FUSE 51 BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BLOWER MOTOR RESISTOR ASSEMBLY (RIGHT REAR OF ENGINE COMPT) BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) BRN WIRE BRN/WHT WIRE DK BLU WIRE HEAT HEAT/DEF DEF HOT AT ALL TIMES HOT IN HVAC 1 FUSE 9 HVAC CONTROL ASSEMBLY HVAC FUSE 10 LT BLU WIRE MED LO OFF OFF VENT BI-LEV ORG/ WIRE PPL RED WIRE RED/BLK WIRE RED/WHT WIRE RR BLOWER FUSE 13 RUN WIRE SPLICE PACK (BOTTOM OF LEFT "B" PILLAR) TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE

5 VOLT REF HEADLAMP ON IND PNK WIRE AUXILIARY BLOWER MOTOR SWITCH BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (LOWER RIGHT SIDE OF DASH) BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) BRN/WHT WIRE DIMMING INPUT DIMMING RETURN DRIVER DOOR LOCK SWITCH DRIVER WINDOW SWITCH ENC = HVAC PROVISIONS AUXILIARY HEATER PLUMBING AND WIRING FRONT AUXILIARY HVAC CONTROL ASSEMBLY FRONT PASSENGER DOOR LOCK SWITCH FRONT PASSENGER WINDOW SWITCH GRY WIRE GRY/BLK WIRE HEADLAMP AND PANEL DIMMER SWITCH HVAC CONTROL ASSEMBLY INFLATABLE RESTRAINT I/P MODULE DISABLE SWITCH INSTRUMENT CLUSTER LOGIC ORG/BLK WIRE PANEL LPS DIM BACK-UP LPS CTRL LED DIMMING SIG PNK WIRE PPL/WHT WIRE REAR AUXILIARY HVAC CONTROL ASSEMBLY REAR SEAT AUDIO (RSA) CONTROL SPLICE TOW/HAUL SWITCH TRACTION CONTROL SWITCH (2004) W/ REAR AUX CONTROLS W/O REAR AUX CONTROLS WITH P/WINDOWS AND DOOR LOCKS YEL WIRE

A/C HIGH PRESSURE SWITCH AUXILIARY AIR TEMPERATURE ACTUATOR AUXILIARY MODE ACTUATOR (LEFT REAR OF PASSENGER COMPT) BLK WIRE BLOW FUSE 51 BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BLOWER MOTOR RESISTOR ASSEMBLY (RIGHT REAR OF ENGINE COMPT) BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) BRN WIRE BRN/WHT WIRE DEFOGGER SYSTEM DK BLU WIRE DK GRN/WHT WIRE FRONT AUXILIARY HVAC CONTROL ASSEMBLY (IF EQUIPPED) GRY WIRE HOT AT ALL TIMES HOT IN HVAC 1 FUSE 9 HVAC CONTROL ASSEMBLY HVAC FUSE 10 LOGIC LT BLU WIRE LT GRN WIRE MED OFF OFF MAX NORM BI-LEV ORG/ WIRE PPL R DEFOG IND GROUND ING 3 BATTERY RED WIRE RED/BLK WIRE RED/WHT WIRE RR BLOWER FUSE 13 RUN WIRE TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VENT HEAT HEAT/DEF DEF VENT HEAT HEAT/DEF DEF OFF MAX NORM BI-LEV WHT WIRE YEL WIRE

A/C HIGH PRESSURE SWITCH AUXILIARY HVAC CONTROL PROCESSOR (BEHIND AUXILIARY HVAC ASSEMBLY, IN HEADLINER) BLK WIRE BLOW FUSE 51 BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BLOWER MOTOR RESISTOR ASSEMBLY (RIGHT REAR OF ENGINE COMPT) BODY FUSE BLOCK (BELOW LEFT FRONT SEAT) BREAKOUT) BREAKOUT) (W/O RV UPFITTER OPTION: IN FRONT HEADLINER HARN, BRN WIRE BRN/WHT WIRE DEFOGGER SYSTEM DK BLU WIRE DK GRN/WHT WIRE EXCEPT RV FRONT AUXILIARY HVAC CONTROL ASSEMBLY GRY WIRE HOT AT ALL TIMES HOT IN HVAC 1 FUSE 9 HVAC CONTROL ASSEMBLY HVAC FUSE 10 LOGIC LT BLU WIRE LT GRN WIRE MED OFF OFF LO MED HI OFF MAX NORM BI-LEV ORG/ WIRE PNK/BLK WIRE PPL PPL/WHT WIRE R DEFOG IND GROUND ING 3 BATTERY REAR REAR AUXILIARY HVAC CONTROL ASSEMBLY RED WIRE RED/BLK WIRE RED/WHT WIRE RR BLOWER FUSE 13 RUN WIRE TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VENT HEAT HEAT/DEF DEF VENT HEAT HEAT/DEF DEF OFF MAX NORM BI-LEV WHT WIRE YEL WIRE

ABS FUSE 48 AUX PWR FUSE 29 IPC FUSE 31 AUXILIARY POWER OUTLET BATTERY BLK WIRE BLOW FUSE 51 BLOWER MOTOR RESISTOR ASSEMBLY BODY CONTROL MODULE (BCM) BODY FUSE BLOCK CIGAR FUSE 30 CIGAR LIGHTER DATA LINK CONNECTOR (DLC) DRIVER SEAT ADJUSTER SWITCH (IF EQUIPPED) FLASHER FUSE 14 FROM UNDERHOOD FUSE BLOCK (RFA FUSE 20) (DIAGRAM 1 OF 6) FRONT PASSENGER SEAT ADJUSTER SWITCH (IF EQUIPPED) FUSIBLE LINK B FUSIBLE LINK C GENERATOR HVAC CONTROL ASSEMBLY INSTRUMENT PANEL CLUSTER (IPC) LEFT TRAILER STOP/TURN RELAY (IF EQUIPPED) MEGA FUSE 65 ORG/ WIRE PCM BAT FUSE 2 POWERTRAIN CONTROL MODULE (PCM) ELECTRONIC BRAKE CONTROL MODULE (EBCM) PWR SEAT CIRCUIT BREAKER 60 RADIO RADIO BAT FUSE 1 TRL STOP/TRN FUSE 17 RED WIRE RED/BLK WIRE RED/WHT WIRE REMOTE CONTROL DOOR LOCK RECEIVER (IF EQUIPPED) RFA FUSE 20 RR DEF/HTD MIR FUSE 8 SPARE FUSE 64 STARTER STOP LAMP SWITCH STOP LP FUSE 7 TBC 2 FUSE 18 TBC 3 FUSE 16 TBC 4 FUSE 11 TBC FUSE 19 TO BODY FUSE BLOCK (DOOR LKS FUSE 15) (DIAGRAM 2 OF 6) TO UNDERHOOD FUSE BLOCK (CAN VENT FUSE 34) (DIAGRAM 2 OF 6) TO UNDERHOOD FUSE BLOCK (TBC FUSE 19) (DIAGRAM 1 OF 6) TRLR FUSE 13 TRLR FUSE 50 TURN SIGNAL/ HAZARD FLASHER MODULE UNDERHOOD FUSE BLOCK VEHICLE COMMUNICATION INTERFACE MODULE (VCIM) (IF EQUIPPED) W/ REAR WINDOW DEFOGGER/ HEATED MIRRORS

AIR TEMPERATURE ACTUATOR AUXILIARY 1 FUSE 32 AUXILIARY AIR TEMPERATURE ACTUATOR AUXILIARY HIGH SPEED BLOWER MOTOR RELAY AUXILIARY HVAC CONTROL PROCESSOR AUXILIARY LOW SPEED BLOWER MOTOR RELAY AUXILIARY MED SPEED BLOWER MOTOR RELAY AUXILIARY MODE ACTUATOR AUXILIARY RELAY BODY FUSE BLOCK BREAKOUT) (W/O RV UPFITTER OPTION) (W/ RV UPFITTER OPTION) BRKS FUSE 11 BRN WIRE DK GRN WIRE DRIVER WINDOW SWITCH (IF EQUIPPED) ELECTRONIC BRAKE CONTROL MODULE (EBCM) FROM BODY FUSE BLOCK (CTSY LP/SEO FUSE 3) (DIAGRAM 3 OF 6) FROM IGNITION SWITCH (DIAGRAM 3 OF 6) FRONT AUXILIARY HVAC CONTROL ASSEMBLY FRONT AUXILIARY HVAC CONTROL ASSEMBLY REAR AUXILIARY HVAC CONTROL ASSEMBLY FRONT PASSENGER WINDOW SWITCH (IF EQUIPPED) HVAC 1 FUSE 9 HVAC CONTROL ASSEMBLY HVAC FUSE 10 NOT AVAILABLE FUSE 17 ORG/ WIRE OSRVM FUSE 2 OUTSIDE REARVIEW MIRROR SWITCH (IF EQUIPPED) PROVISIONAL RED/BLK WIRE RED/WHT WIRE RR BLOWER FUSE 13 UNDERHOOD FUSE BLOCK W/ AUXILIARY HVAC W/ REAR AUXILIARY CONTROL W/ REAR AUXILIARY HVAC W/O REAR AUXILIARY CONTROL WND RAP RELAY PWR WND CIRCUIT BREAKER