Chevrolet Chevy Express G2500 (1996-2012) htr a/c fuse 12 Wiring diagrams

AIR TEMPERATURE ACTUATOR (UNDER DASH, RIGHT SIDE OF HVAC PLENUM) AUXILIARY BLOWER MOTOR (IF EQUIPPED) (LEFT REAR OF CABIN, BEHIND REAR WHEELWELL) AUXILIARY BLOWER MOTOR SWITCH (IF EQUIPPED) BLK WIRE BLOWER FUSE BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BRN WIRE CONVENIENCE CENTER DK BLU WIRE GRY WIRE HEAT BLEND DEF HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HTR A/C FUSE 12 HVAC CONTROL ASSEMBLY I/P FUSE BLOCK (LOWER LEFT KICK PANEL) LT BLU WIRE MED LO OFF OFF VENT ORG/ WIRE PPL RED WIRE RR BLOWER FUSE RR HVAC FUSE 24 TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE

A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH RELAY (IN UNDERHOOD FUSE BLOCK) A/C FUSE A/C HIGH PRESSURE SWITCH (REAR OF A/C COMPRESSOR) AIR TEMPERATURE ACTUATOR (AUXILIARY) (LEFT REAR INTERIOR) AUXILIARY BLOWER MOTOR BLK WIRE BLOWER FUSE BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BRN WIRE CLUTCH RLY CTRL CONVENIENCE CENTER DIODE (IN UNDERHOOD FUSE BLOCK) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HTR A/C FUSE 12 HVAC CONTROL ASSEMBLY HVAC CONTROL ASSEMBLY (FRONT AUXILIARY) (IF EQUIPPED) I/P FUSE BLOCK (LOWER LEFT KICK PANEL) LOW PRESS SIG LT BLU WIRE LT GRN WIRE MODE ACTUATOR (AUXILIARY) (LEFT REAR INTERIOR) OFF LO MED HI OFF MAX A/C BI-LEV ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (ON LEFT FRONT INNER FENDER) PPL RED WIRE REQUEST SIG RR BLOWER FUSE RR HVAC FUSE 24 TAN WIRE TEMP UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) IGN E FUSE VENT HEAT BLEND DEF VENT HEAT BLEND DEF OFF MAX A/C BI-LEV VENT MODE WHT WIRE YEL WIRE

A/C COMPRESSOR CLUTCH A/C COMPRESSOR ENABLE RELAY (IN UNDERHOOD FUSE BLOCK) A/C HIGH PRESSURE SWITCH (REAR OF A/C COMPRESSOR) AUXILIARY BLOWER MOTOR (BEHIND LEFT REAR WHEELHOUSE) BLK WIRE BLOWER FUSE BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BRN WIRE CLUTCH RLY CTRL CONVENIENCE CENTER DIODE (IN UNDERHOOD FUSE BLOCK) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN HTR A/C FUSE 12 HVAC CONTROL ASSEMBLY HVAC CONTROL ASSEMBLY (FRONT AUXILIARY) HVAC CONTROL ASSEMBLY (REAR AUXILIARY) HVAC CONTROL PROCESSOR AUXILIARY) (FRONT INTERIOR ROOF PANEL) I/P FUSE BLOCK (LOWER LEFT KICK PANEL) LOW PRESS SIG LT BLU WIRE LT GRN WIRE OFF LO MED HI OFF MAX A/C BI-LEV ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (ON LEFT FRONT INNER FENDER) PPL RED WIRE REQUEST SIG RR BLOWER FUSE RR CTRL OFF LO MED HI RR HVAC FUSE 24 TAN WIRE TEMP UNDER- HOOD FUSE BLOCK A/C FUSE IGN E FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VENT HEAT BLEND DEF VENT HEAT BLEND DEF OFF MAX A/C BI-LEV VENT MODE WHT WIRE YEL WIRE

AIR TEMPERATURE ACTUATOR (UNDER DASH, RIGHT SIDE OF HVAC PLENUM) AUXILIARY BLOWER MOTOR (IF EQUIPPED) (LEFT REAR OF CABIN, BEHIND REAR WHEELWELL) AUXILIARY BLOWER MOTOR SWITCH (IF EQUIPPED) BLK WIRE BLOWER FUSE BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BRN WIRE CONVENIENCE CENTER DK BLU WIRE GRY WIRE HEAT BLEND DEF HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HTR A/C FUSE 12 HVAC CONTROL ASSEMBLY I/P FUSE BLOCK (LOWER LEFT KICK PANEL) LT BLU WIRE MED LO OFF OFF VENT ORG/ WIRE PPL RED WIRE RR BLOWER FUSE RR HVAC FUSE 24 TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE

A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH RELAY (IN UNDERHOOD FUSE BLOCK) A/C FUSE A/C HIGH PRESSURE SWITCH (REAR OF A/C COMPRESSOR) AIR TEMPERATURE ACTUATOR (AUXILIARY) (LEFT REAR INTERIOR) AUXILIARY BLOWER MOTOR BLK WIRE BLOWER FUSE BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BRN WIRE CLUTCH RLY CTRL CONVENIENCE CENTER DIODE (IN UNDERHOOD FUSE BLOCK) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HTR A/C FUSE 12 HVAC CONTROL ASSEMBLY HVAC CONTROL ASSEMBLY (FRONT AUXILIARY) (IF EQUIPPED) I/P FUSE BLOCK (LOWER LEFT KICK PANEL) LOW PRESS SIG LT BLU WIRE LT GRN WIRE MODE ACTUATOR (AUXILIARY) (LEFT REAR INTERIOR) OFF LO MED HI OFF MAX A/C BI-LEV ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (ON LEFT FRONT INNER FENDER) PPL RED WIRE REQUEST SIG RR BLOWER FUSE RR HVAC FUSE 24 TAN WIRE TEMP UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) IGN E FUSE VENT HEAT BLEND DEF VENT HEAT BLEND DEF OFF MAX A/C BI-LEV VENT MODE WHT WIRE YEL WIRE

A/C COMPRESSOR CLUTCH A/C COMPRESSOR ENABLE RELAY (IN UNDERHOOD FUSE BLOCK) A/C HIGH PRESSURE SWITCH (REAR OF A/C COMPRESSOR) AUXILIARY BLOWER MOTOR (BEHIND LEFT REAR WHEELHOUSE) BLK WIRE BLOWER FUSE BLOWER MOTOR (RIGHT REAR OF ENGINE COMPT) BRN WIRE CLUTCH RLY CTRL CONVENIENCE CENTER DIODE (IN UNDERHOOD FUSE BLOCK) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GRY WIRE HOT AT ALL TIMES HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN HTR A/C FUSE 12 HVAC CONTROL ASSEMBLY HVAC CONTROL ASSEMBLY (FRONT AUXILIARY) HVAC CONTROL ASSEMBLY (REAR AUXILIARY) HVAC CONTROL PROCESSOR AUXILIARY) (FRONT INTERIOR ROOF PANEL) I/P FUSE BLOCK (LOWER LEFT KICK PANEL) LOW PRESS SIG LT BLU WIRE LT GRN WIRE OFF LO MED HI OFF MAX A/C BI-LEV ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (ON LEFT FRONT INNER FENDER) PPL RED WIRE REQUEST SIG RR BLOWER FUSE RR CTRL OFF LO MED HI RR HVAC FUSE 24 TAN WIRE TEMP UNDER- HOOD FUSE BLOCK A/C FUSE IGN E FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VENT HEAT BLEND DEF VENT HEAT BLEND DEF OFF MAX A/C BI-LEV VENT MODE WHT WIRE YEL WIRE

A/C COMPRESSOR CLUTCH COIL A/C COMPRESSOR CLUTCH RELAY (IN UNDERHOOD FUSE/RELAY CENTER) A/C COMPRESSOR HIGH PRESSURE CUTOFF SWITCH (REAR OF A/C COMPRESSOR) A/C COMPRESSOR LOW PRESSURE CUTOFF SWITCH (DIESEL) (IN REFRIGERANT LINE) A/C COMPRESSOR LOW PRESSURE CUTOFF SWITCH (GASOLINE) (IN REFRIGERANT LINE) A/C FUSE AUXILIARY BLOWER MOTOR AUXILIARY BLOWER MOTOR RESISTOR (LEFT REAR OF CABIN, BEHIND REAR WHEELHOUSE) BLK WIRE BLOWER FUSE BLOWER MOTOR BLOWER MOTOR RESISTOR/RELAY (AT HVAC CONTROL PANEL) BRN WIRE COMPT AT LEFT FENDER) POWERTRAIN CONTROL MODULE (BEHIND (DIESEL) CENTER OF DASH) CONVENIENCE CENTER DIODE (IN UNDERHOOD FUSE/RELAY CENTER) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GASOLINE GASOLINE DIESEL GRY WIRE HEATER AND A/C CONTROLLER HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR START HTR A/C FUSE 12 I/P FUSE BLOCK LT BLU WIRE LT GRN WIRE OFF LO MED HI OFF MAX A/C BI-LEV ORG/ WIRE PNK WIRE PPL REAR AUXILIARY HVAC CONTROL MODULE REAR AUXILIARY MODE VALVE AND SEAL ASSY (LEFT REAR INTERIOR) REAR AUXILIARY TEMPERATURE VALVE ASSY (LEFT REAR INTERIOR) RED WIRE RR BLOWER FUSE RR HVAC FUSE 24 TAN WIRE TEMP UNDER HOOD FUSE-RELAY CENTER UNDER- HOOD FUSE/ RELAY CENTER IGN E FUSE VEHICLE CONTROL MODULE (IN ENGINE VENT HEAT BLEND DEF VENT HEAT BLEND DEF OFF MAX A/C BI-LEV VENT MODE WHT WIRE YEL WIRE

A/C COMPRESSOR CLUTCH COIL A/C COMPRESSOR CLUTCH RELAY (IN UNDERHOOD FUSE/RELAY CENTER) A/C COMPRESSOR HIGH PRESSURE CUTOFF SWITCH (REAR OF A/C COMPRESSOR) A/C COMPRESSOR LOW PRESSURE CUTOFF SWITCH (DIESEL) (IN REFRIGERANT LINE) A/C COMPRESSOR LOW PRESSURE CUTOFF SWITCH (GASOLINE) (IN REFRIGERANT LINE) AUXILIARY BLOWER MOTOR AUXILIARY BLOWER MOTOR RESISTOR (LEFT REAR OF CABIN, BEHIND REAR WHEELHOUSE) BLK WIRE BLOWER FUSE BLOWER MOTOR BLOWER MOTOR RESISTOR/RELAY (AT HVAC CONTROL PANEL) BRN WIRE COMPT AT LEFT FENDER) POWERTRAIN CONTROL MODULE (BEHIND (DIESEL) CENTER OF DASH) CONVENIENCE CENTER DIODE (IN UNDERHOOD FUSE/RELAY CENTER) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE FRONT AUXILIARY HVAC CONTROL MODULE GASOLINE GASOLINE DIESEL GRY WIRE HEATER AND A/C CONTROL LOGIC MODULE (FRONT INTERIOR ROOF PANEL) HEATER AND A/C CONTROLLER HOT AT ALL TIMES HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN HTR A/C FUSE 12 I/P FUSE BLOCK LT BLU WIRE LT GRN WIRE OFF LO MED HI OFF MAX A/C BI-LEV ORG/ WIRE PNK WIRE PPL REAR AUXILIARY HVAC CONTROL MODULE REAR AUXILIARY MODE VALVE AND SEAL ASSY (LEFT REAR INTERIOR) REAR AUXILIARY TEMPERATURE VALVE ASSY (LEFT REAR INTERIOR) RED WIRE RR BLOWER FUSE RR CTRL OFF LO MED HI RR HVAC FUSE 24 TAN WIRE TEMP UNDER HOOD FUSE-RELAY CENTER UNDER- HOOD FUSE/ RELAY CENTER A/C FUSE IGN E FUSE VEHICLE CONTROL MODULE (IN ENGINE VENT HEAT BLEND DEF VENT HEAT BLEND DEF OFF MAX A/C BI-LEV VENT MODE WHT WIRE YEL WIRE

BLK WIRE BRN WIRE CONVENIENCE CENTER (UNDER LEFT SIDE OF DASH) HEATED MIRROR SWITCH HEATER, A/C CONTROLLER HOT AT ALL TIMES HOT IN HTD MIR FUSE 2 HTR A/C FUSE 12 I/P FUSE BLOCK (ON LEFT LOWER KICK PANEL) LEFT POWER OUTSIDE REAR VIEW MIRROR ORG/ WIRE RIGHT POWER OUTSIDE REAR VIEW MIRROR RUN WIRE SOLID STATE TIMER W/ UPFITTER PROVISIONS ONLY

ABS FUSE AMBULANCE AUX-A FUSE AUX-B FUSE AUXILIARY BATTERY AUXILIARY BLOWER MOTOR HIGH SPEED RELAY AUXILIARY BLOWER MOTOR LOW SPEED RELAY AUXILIARY BLOWER MOTOR MEDIUM SPEED RELAY AUXILIARY BLOWER MOTOR LOW SPEED RELAY BATTERY BATTERY JUNCTION BLOCK BLK WIRE BLK/YEL WIRE BLOWER FUSE BLOWER MOTOR RESISTOR/ RELAY BRAKE FUSE 18 BRN WIRE CONVENIENCE CENTER CRUISE CONTROL MODULE (GASOLINE) CRUISE CONTROL SWITCH CRUISE FUSE 6 DIESEL ELECTRONIC BRAKE CONTROL MODULE (EBCM) FRONT AUXILIARY HVAC CONTROL MODULE HEATER AND A/C CONTROL LOGIC MODULE FUSIBLE LINK FUSIBLE LINK (10 GA- FUSIBLE LINK (10 GA-RUST) FUSIBLE LINK (14 GA- GASOLINE GENERATOR GLOWPLUG RELAY GRY WIRE HEATER AND A/C CONTROLLER HTR A/C FUSE 12 I/P FUSE BLOCK CRANK FUSE 8 WIPER FUSE 11 RADIO 1 FUSE 17 IGN A FUSE IGN B FUSE IGNITION SWITCH INLINE FUSE LEFT FRONT POWER SIDE WINDOW SWITCH LOCK LOCK LOCK OFF OFF LOCK OFF NCA WIRE OFF ORG/ WIRE P/B BOOSTER FLUID LOW ALARM PARK/ NEUTRAL POSITION SWITCH PASSENGER PNK WIRE PPL PWR WDO FUSE B REAR AUXILIARY TEMPERATURE VALVE ASSEMBLY RED WIRE RIGHT FRONT POWER SIDE WINDOW SWITCH (LEFT KICK PANEL) RR BLOWER FUSE RR HVAC FUSE 24 RUN WIRE RUST) STARTER RELAY STARTER SOLENOID TEMPERATURE VALVE ACTUATOR MOTOR TO TRANS FUSE (DIAGRAM 4 OF 4) TO UNDERHOOD FUSE-RELAY CENTER (DIAGRAM 2 OF 4) TO UPFITTER PROVISION RELAY (DIAGRAM 1 OF 4) TRAILER WIRING PROVISION UNDERHOOD FUSE/RELAY CENTER UPFITTER PROVISION CONNECTOR UPFITTER PROVISION RELAY (BEHIND LEFT B PILLAR) W/ REAR A/C W/ REAR A/C PASSENGER WHT WIRE YEL WIRE