Chevrolet TrailBlazer I (2001-2006) low ref Wiring diagrams

5.3L 4.2L A/C COMPRESSOR CLUTCH A/C FUSE 30 A/C LOW PRESSURE SWITCH (AT RIGHT REAR OF ENG COMPT, ON ACCUMULATOR) A/C PRESS SIG A/C REFRIGERANT PRESSURE SENSOR (ON HIGH PRESSURE LINE NEAR A/C COMP) A/C RELAY 44 AMBIENT LIGHT SENS BLK WIRE BODY CONTROL MODULE (BENEATH LEFT REAR SEAT, ON REAR FUSE BLOCK) COMP RLY CNTRL COOLING FAN COOLING FAN RELAY DATA LINK CONNECTOR (ON BOTTOM OF LEFT SIDE OF DASH) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENG FAN FUSE 20 GRY WIRE GRY/WHT WIRE HALL SENSOR HIGH SPD MAF HOT AT ALL TIMES HOT IN RUN OR START IGN E FUSE 22 LOW REF LOW REFERENCE LT BLU/BLK WIRE LT GRN WIRE LT SUNLOAD SENS SIG ORG/ WIRE PPL RED/BLK WIRE RT SUNLOAD SENS SIG SERIAL DATA UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE

5.3L 4.2L A/C COMPRESSOR CLUTCH A/C FUSE 30 A/C LOW PRESSURE SWITCH (AT RIGHT REAR OF ENG COMPT, ON ACCUMULATOR) A/C PRESS SIG A/C REFRIGERANT PRESSURE SENSOR (ON HIGH PRESSURE LINE NEAR A/C COMP) A/C RELAY 44 AMBIENT LIGHT SENS AUXILIARY BLOWER MOTOR (W/ REAR A/C) (BELOW CENTER OF DASH) AUXILIARY CONSOLE MODE ACTUATOR (W/ REAR A/C) (BELOW CENTER OF DASH) AUXILIARY HVAC CONTROL MODULE BATT CLASS 2 DATA GROUND AUX MODE DR AUX BLWR HI SPD AUX BLWR LO SPD BLK WIRE BODY CONTROL MODULE (BENEATH LEFT REAR SEAT, ON REAR FUSE BLOCK) BRN WIRE COMP RLY CNTRL COOLING FAN DATA LINK CONNECTOR (ON BOTTOM OF LEFT SIDE OF DASH) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENG FAN FUSE 20 FAN RELAY 45 GRY WIRE GRY/WHT WIRE HALL SENSOR HIGH SPD MAF HOT AT ALL TIMES HOT IN RUN OR START IGN E FUSE 22 LOW REF LOW REFERENCE LT BLU/BLK WIRE LT GRN WIRE LT SUNLOAD SENS SIG MODE OFF (W/ REAR A/C) ORG/ WIRE PPL RED/BLK WIRE RT SUNLOAD SENS SIG SERIAL DATA UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ REAR A/C WHT WIRE WHT/BLK WIRE

5.3L 4.2L A/C COMPRESSOR CLUTCH A/C FUSE 30 A/C LOW PRESSURE SWITCH (AT RIGHT REAR OF ENG COMPT, ON ACCUMULATOR) A/C PRESS SIG A/C REFRIGERANT PRESSURE SENSOR (ON HIGH PRESSURE LINE NEAR A/C COMP) A/C RELAY 44 BLK WIRE BLK/WHT WIRE BRN WIRE COMP RLY CNTRL DATA LINK CONNECTOR (ON BOTTOM OF LEFT SIDE OF DASH) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE GROUND A/C LOW PRESS SW IGN 3 POWER GROUND CLASS 2 A/C COMP STATUS 204 341 4340 GRY WIRE HOT AT ALL TIMES HOT IN HOT IN RUN OR START HVAC 1 FUSE 39 HVAC CONTROL MODULE HVAC-B FUSE 36 IGN E FUSE 22 LOW REF LT GRN WIRE ORG/ WIRE PPL PPL REAR FUSE BLOCK (BELOW LEFT REAR SEAT) RED/BLK WIRE RUN WIRE SERIAL DATA UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE

17 9 CLASS 2 DATA LOW REF AJAR BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BENEATH LEFT REAR SEAT, ON REAR FUSE BLOCK) BRN WIRE BRN/WHT WIRE CLASS 2 DATA CLASS 2 DATA HEADLAMP RELAY CTRL CLASS 2 DATA HORN RELAY CTRL DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DOOR AJAR SIG DOOR AJAR SWITCH DOWN DRIVER DOOR LATCH ASSEMBLY DRIVER DOOR MODULE (BELOW DRIVER'S DOOR SWITCH PANEL) ENDGATE KEY CYLINDER SWITCH ENDGATE MODULE (XUV) (CENTER OF ENDGATE) FRONT PASSENGER DOOR LATCH ASSEMBLY FRONT PASSENGER DOOR MODULE (BELOW FRONT PASSENGER DOOR SWITCH PANEL) GRY WIRE GRY/BLK WIRE HEAD- LAMPS SYSTEM HORNS SYSTEM HOT AT ALL TIMES INSTRUMENT PANEL CLUSTER KEY CYL DOWN SIG KEY CYL UP SIG KEY SWITCH KEY SWITCH SIG LEFT REAR DOOR JAMB SWITCH LIFTGATE AJAR SIG LIFTGATE AJAR SWITCH LIFTGATE MODULE (EXCEPT XUV) (CENTER OF LIFTGATE) LIFTGLASS AJAR SWITCH LL AJAR SIG LOW REF LOWER LEFT ENDGATE ACTUATOR LT BLU WIRE LT GRN WIRE NCA WIRE PNK/BLK WIRE PPL PPL DATA LINK CONNECTOR (DLC) (ON BOTTOM LEFT SIDE OF DASH) PPL LIFTGLASS AJAR SIG PPL/WHT WIRE REAR FUSE BLOCK REAR FUSE BLOCK (BELOW LEFT REAR SEAT) RIGHT REAR DOOR JAMB SWITCH SECURITY TAN WIRE TAN/WHT WIRE TBC 2 FUSE 7 TBC 3 FUSE 4 TBC 4 FUSE 40 TBC 5 FUSE 32 TRUNK, TAILGATE, FUEL DOORS SYSTEM UL AJAR SIG UPPER LEFT ENDGATE ACTUATOR UPPER RIGHT ENDGATE ACTUATOR UR AJAR SIG YEL WIRE

5.3L 4.2L 58 59 59 58 CLASS 2 DATA CLASS 2 DATA 7 63 5 VOLT REF LOW REF ABS IND. AIR BAG IND AIR SUSPENSION COMPRESSOR ASSEMBLY BATTERY IND BLK (OR GRY) WIRE BLK WIRE BLK/ WHT WIRE BLK/WHT WIRE BRAKE IND BRN/WHT WIRE CHANGE ENG OIL IND CHECK GAUGES IND CLASS 2 VSS COMPUTER DATA LINES SYSTEM CRUISE IND DIC FUEL SIG DIC SW SIG DIC TOGGLE SW DIC SET/RESET ENG SPEED SIG DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE DRIVER SEAT BELT SWITCH (IN LEFT FRONT SEAT BELT BUCKLE) ECT SENS SIG ENG SPEED ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR (LEFT FRONT OF ENG BLOCK) 2761 (OR 720) ENGINE OIL PRESSURE SENSOR (5.3L) (AT TOP REAR OF ENG BLOCK) ENGINE OIL PRESSURE SWITCH (4.2L) (RIGHT SIDE OF ENGINE BLOCK) FUEL GAUGE FUEL PUMP, SENDER ASSEMBLY (INSIDE FUEL TANK) GRY WIRE HIGH BEAM IND HOT AT ALL TIMES HOT IN RUN OR START IGN 1 IGN E FUSE 22 ILLUMINATION (8 BULBS) INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL INSTRUMENT PANEL CLUSTER LEFT TURN BATT GROUND LEFT TURN IND LOGIC LOW FUEL IND LOW REF LT BLU WIRE MALFUNCTION INDICATOR LAMP (SERVICE ENGINE SOON) MIL CTRL NCA WIRE OIL GAUGE OIL PRES SIG OIL PRESS SW ORG/ WIRE ORG/BLK (OR BLK) WIRE ORG/BLK WIRE PERSONAL- IZATION FUEL TRIP PNK WIRE PPL PPL FUEL LEVEL PPL LOW REF RADIO REDUCE ENG POWER IND RIGHT TURN IND RIGHT TURN LO WASHER FLUID SEAT BELT IND SEAT BELT SWITCH SECURITY IND SELECT SHIFT IND SPEEDOMETER STEERING WHEEL CONTROL ASSEMBLY TACHOMETER TAILGATE AJAR IND TAN/BLK WIRE TAN/WHT WIRE TEMP GAUGE TRIP ODOMETER DIC UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) IPC/DIC FUSE 24 VOLTS GAUGE VSS WHT WIRE WINDSHIELD WASHER FLUID LEVEL SWITCH (IN WINDSHIELD WASHER FLUID RESERVOIR) YEL WIRE

5.3L 4.2L A/C COMPRESSOR CLUTCH A/C FUSE 30 A/C LOW PRESSURE SWITCH (AT RIGHT REAR OF ENG COMPT, ON ACCUMULATOR) A/C PRESS SIG A/C REFRIGERANT PRESSURE SENSOR (ON HIGH PRESSURE LINE NEAR A/C COMP) A/C RELAY 44 BLK WIRE COMP RLY CNTRL COOLING FAN DATA LINK CONNECTOR (ON BOTTOM OF LEFT SIDE OF DASH) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENG FAN FUSE 20 FAN RELAY GRY WIRE GRY/WHT WIRE HALL SENSOR HIGH SPD MAF HOT AT ALL TIMES HOT IN RUN OR START IGN E FUSE 22 LOW REF LT GRN WIRE ORG/ WIRE PPL RED/BLK WIRE SERIAL DATA UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE

1 4 6 7 IGN VOLTAGE AUX HVAC ENABLE AUX DR MTR CNTRL GROUND 5.3L 4.2L A/C COMPRESSOR CLUTCH A/C FUSE 30 A/C LOW PRESSURE SWITCH (AT RIGHT REAR OF ENG COMPT, ON ACCUMULATOR) A/C PRESS SIG A/C REFRIGERANT PRESSURE SENSOR (ON HIGH PRESSURE LINE NEAR A/C COMP) A/C RELAY 44 AUXILIARY CONSOLE MODE ACTUATOR (W/ REAR A/C) (UNDER LOWER CONSOLE) AUXILIARY HVAC CONTROL MODULE BI LVL BLK WIRE BRN WIRE COMP RLY CNTRL COOLING FAN DATA LINK CONNECTOR (ON BOTTOM OF LEFT SIDE OF DASH) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENG FAN FUSE 20 FAN RELAY 45 GRY WIRE GRY/WHT WIRE HALL SENSOR HIGH SPD MAF HOT AT ALL TIMES HOT IN RUN OR START IGN E FUSE 22 LO REF FLOOR UPPER LOW REF LT GRN WIRE PPL RED/BLK WIRE SERIAL DATA UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) W/ REAR A/C WHT WIRE WHT/BLK WIRE YEL WIRE

1-2 SHIFT SOL CTRL 2-3 SHIFT SOL CTRL 3-2 SHIFT SOL ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE CAM POS SOL HI CAMSHAFT ACTUATOR SOLENOID ASSEMBLY (RIGHT FRONT OF CYLINDER HEAD) CKP SENS SIG DELIV TORQUE SIG DK GRN WIRE DK GRN/WHT WIRE ECT SENS SIG ENGINE COOLANT TEMPERATURE SENSOR (LEFT FRONT OF ENGINE BLOCK) EVAP CAN PRG CTL EVAP CAN VENT FUEL INJ 1 FUEL INJ 2 FUEL INJ 3 FUEL INJ 4 FUEL INJ 5 FUEL INJ 6 FUSE 29 10 GFD CYC SIG GROUND GRY WIRE HEATED OXYGEN SENSOR 1 (ON EXHAUST MANIFOLD, RIGHT SIDE OF ENGINE) HEATED OXYGEN SENSOR 2 (DOWNSTREAM OF CATALYTIC CONVERTER) HOT IN RUN, START IC 1 CTRL IC 2 CTRL IC 3 CTRL IC 4 CTRL IC 5 CTRL IC 6 CTRL INJECTORS LOW REF LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR (UPPER LEFT SIDE OF ENGINE) MAP SENS SIG NCA WIRE OIL PRES SW SIG ORG/BLK WIRE PC SOL HIGH CTRL PC SOL LOW CTRL PNK PNK 2 3 WIRE PNK PNK PNK PNK PNK PNK PNK WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (UPPER LEFT SIDE OF ENGINE) PPL PPL 21 22 23 PPL/WHT WIRE PRIM FUEL PMP REL RED/BLK WIRE RED/WHT WIRE REQ TORQUE SIG STARTING/ CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC PWM SOL TCC SOL VLV CTRL TRNS RG SW SIG A UNDER- HOOD FUSE BLOCK PCM I FUSE 28 VSS HIGH SIG VSS LOW SIGNAL WHT WIRE YEL WIRE YEL/BLK WIRE

29 30 31 PNK WIRE 7 8 PPL APP SENS 1 APP SENS 2 BLK WIRE BLK/WHT WIRE BRN WIRE CRUISE CONTROL CRUISE CONTROL SYSTEM CRUISE ON DATA DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE GROUND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN OR START IAT IGN 1 VOLT INTAKE AIR TEMPERATURE (IAT)/ MASS AIRFLOW (MAF) SENSOR (IN AIR INTAKE DUCT) LOW REF LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE MAF ORG/ WIRE ORG/BLK WIRE PNK PNK PNK WIRE PNK PNK WIRE PNK WIRE PPL PPL PNK PNK WIRE PPL/WHT WIRE R/A INPUT REAR FUSE BLOCK (BELOW LEFT REAR SEAT) RED WIRE RED/BLK WIRE RED/WHT WIRE REF LOW S/C INPUT ST/LP FUSE 12 STOP LAMP SWITCH (TOP OF BRAKE PEDAL BRACKET) STP LP IN TAC CNTRL TAC CTRL TAC FUSE 23 TAN WIRE TAN/BLK WIRE TAN/WHT WIRE THROTTLE ACTUATOR CONTROL MODULE (LOWER LEFT FRONT OF ENGINE) TP SENS 1 TP SENS 2 UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) CANISTER FUSE 15 VEH STOP FUSE 34 WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

29 30 31 PNK WIRE 3212 23 STARTING/ CHARGING SYSTEM A/C PRESS SENS GEN ON SIG A/C SYSTEM A/C SYSTEM STARTING/CHARGING SYSTEM TRANSMISSION SYSTEM (TRANSFER CASE CIRCUIT) ANTI-LOCK BRAKES SYSTEM ANTI-LOCK BRAKES SYSTEM INSTRUMENT CLUSTER SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COOLING FANS SYSTEM CRANK FUSE CTRL DELIVERED TORQ PC SOL HI CTRL DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENG I FUSE 26 ENGINE SPEED SIGNAL EVAP PURGE EVAP VENT CTRL MIL CTRL 2-3 SS CTRL 1-2 SS CTRL VSS OUT VSS OUT TFT SENS SIG GEN FIELD GRY WIRE GRY/BLK WIRE HOT IN HOT IN RUN, START IGN IGN E FUSE 22 IGNITION COILS INSTRUMENT PANEL CLUSTER MALFUNCTION INDICATOR LAMP LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE PC SOL LO CTRL PMP RLY CTRL ENGINE SPEED PCM I FUSE 28 PNK PNK PNK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (LOWER LEFT FRONT OF ENGINE) PPL PPL FUEL LEV SIG PPL IGN CTRL 8 IGN CTRL 2 IGN CTRL 5 IGN CTRL 3 PPL PNK PNK WIRE PPL/WHT WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE REF LO SPARK PLUG SPARK PLUG SPARK PLUG TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC SOL CTRL A/C CLU RLY UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) VSS LOW SIG VSS HIGH SIG WHT WIRE YEL WIRE YEL/BLK WIRE