Chevrolet TrailBlazer I (2001-2006) computer data lines system Wiring diagrams

4 6 7 9 BAT (+) MEMORY 1 SW MEMORY 2 SW ILLUM CTRL ADJ PEDAL RWD SIG ADJ PEDAL FWD SIG ADJ PEDAL SENSOR SIG LUM HORIZ POS SEN SIG AFT BACK UP FUSE 27 BLK WIRE BRN WIRE BRN/WHT WIRE CLASS 2 SERIAL DATA COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRIVER DOOR MODULE (BELOW DRIVER DOOR SWITCH PANEL) DRIVER MEMORY SEAT MODULE (BELOW LEFT FRONT SEAT) DRIVER MEMORY SET SWITCH DRIVER SEAT LUMBAR POSITION SENSOR (FORWARD/ REARWARD) EAP FUSE EAP RELAY 49 ELECTRONIC ADJUSTABLE PEDALS (EAP) SWITCH ELECTRONIC ADJUSTABLE PEDALS ASSEMBLY ELECTRONIC ADJUSTABLE PEDALS RELAY (LEFT SIDE OF DASH, ON PEDAL ASSEMBLY) FORE/ FUSE HOLDER HOT AT ALL TIMES LOW REF LT GRN WIRE MEM 1 MEM 2 EXIT NCA WIRE ORG/ WIRE PARK/ NEUTRAL PARK/NEUTRAL POSITION (PNP) SWITCH PNK WIRE PPL RED WIRE SPLICE PACK TAN WIRE UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE

AIR TEMP SENSOR AMBIENT AIR TEMPERATURE SENSOR (ON LEFT CENTER OF RADIATOR SUPPORT) BACK UP LAMP VOLTAGE OUTPUT BACK UP VOLTAGE BLK WIRE BODY CONTROL MODULE (BENEATH LEFT REAR SEAT, ON REAR FUSE BLOCK) BRN WIRE COMPUTER DATA LINES SYSTEM GROUND HOT IN RUN AND START IGN 1 IGN E FUSE 22 INSIDE REARVIEW MIRROR LOW REF LT GRN WIRE LT GRN/BLK WIRE NCA WIRE PHOTO SENSOR PNK WIRE REAR FUSE BLOCK (BELOW LEFT REAR SEAT) SERIAL DATA UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT)

BAT SPLY VOLT PPL BLK WIRE BRN WIRE COIL COMPUTER DATA LINES SYSTEM DRIVER DOOR MODULE (DDM) (BELOW DRIVER DOOR SWITCH PANEL) DRIVER OUTSIDE REARVIEW MIRROR EGM 2 LGM 2 FUSE 3 (XUV) (EXCEPT XUV) FRONT PASSENGER DOOR MODULE (FPDM) (BELOW FRONT PASSENGER DOOR SWITCH PANEL) GRD HTR HOT AT ALL TIMES HVAC CONTROL MODULE (CENTER OF DASH) LT BLU WIRE NCA WIRE ORG/ WIRE PASSENGER OUTSIDE REARVIEW MIRROR PPL PPL EXCEPT XUV R DEF REAR FUSE BLOCK (BELOW LEFT REAR SEAT) REAR WINDOW DEFOGGER GRID REAR WINDOW DEFOGGER GRID SERIAL DATA TAN WIRE WHT WIRE XUV

BACK ONLY IND BACK ONLY INDICATOR BACK ONLY SELECT BATT + BATT + VOLTAGE BLK WIRE BRN WIRE BRN/WHT WIRE CLASS 2 SERIAL DATA COMPUTER DATA LINES SYSTEM DDM FUSE 10 DRIVER BACK HEATED SEAT ELEMENT DRIVER CUSHION HEATED SEAT ELEMENT DRIVER DOOR MODULE (BELOW DRIVER DOOR SWITCH PANEL) DRIVER MEMORY SEAT MODULE (BELOW LEFT FRONT SEAT) EGM/DSM FUSE 6 GND BAT (+) GRN WIRE GROUND HEAT MODE SELECT HEATED SEAT PWR HEATED SEAT PWR LOW REF HEATED SEAT THERM SIG HI HEAT IND HI HEAT INDICATOR HOT AT ALL TIMES LGM/DSM FUSE 19 LOW HEAT IND LOW HEAT INDICATOR LOW REF LT DOORS CB 2 LT GRN WIRE MED HEAT IND MED HEAT INDICATOR NCA WIRE ORG/ WIRE REAR FUSE BLOCK (BELOW LEFT REAR SEAT) RED WIRE SEATS CIRCUIT BREAKER 8 SERIAL DATA WHT WIRE XUV YEL WIRE YEL/BLK WIRE

1350 3540 GND BAT (+) 4 6 7 9 BAT (+) MEMORY 1 SW MEMORY 2 SW ILLUM CTRL 5475 2079 PASS HTD SEAT THEM SIG DRVR HTD SEAT THEM SIG 5604 5603 ADJ PEDAL RWD SIG ADJ PEDAL FWD SIG ADJ PEDAL SENSOR SIG ADJUSTABLE PEDALS CIRCUIT BATT + BATTERY (+) VOLTAGE BATTERY (+) VOLTAGE BLK WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM CLASS 2 DATA DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/ WHT WIRE DK GRN/WHT WIRE DRIVER DOOR MODULE (BELOW DRIVER DOOR SWITCH PANEL) DRIVER LUMBAR ADJUSTER SWITCH DRIVER MEMORY SEAT MODULE (BELOW LEFT FRONT SEAT) DRIVER MEMORY SEAT SWITCH DRIVER SEAT ADJUSTER SWITCH DRIVER SEAT FRONT POSITION SENSOR DRIVER SEAT FRONT VERTICAL MOTOR DRIVER SEAT HORIZONTAL MOTOR DRIVER SEAT HORIZONTAL POSITION SENSOR DRIVER SEAT LUMBAR HORIZONTAL MOTOR DRIVER SEAT LUMBAR POSITION SENSOR (FORWARD/ REARWARD) DRIVER SEAT REAR POSITION SENSOR DRIVER SEAT REAR VERTICAL MOTOR DRIVER SEAT RECLINE MOTOR DRIVER SEAT RECLINE POSITION SENSOR FRT UP GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES LGM/DSM FUSE 6 LT BLU WIRE LT GRN WIRE MEM 2 MEM 1 EXIT ORG/ WIRE PNK WIRE PNK/BLK WIRE PPL REAR FUSE BLOCK EGM/DSM FUSE 23 REC FWD FWD REC RWD RED WIRE RR DWN RWD RR UP FRT DWN RWD SEATS CIRCUIT BREAKER 8 SEATS SYSTEM (HEATED SEATS) TAN WIRE WHT WIRE WHT/BLK WIRE XUV YEL WIRE YEL/BLK 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

AUXILIARY HVAC CONTROL MODULE BATT + BATT + PWM PWM CTRL BLK WIRE BODY CONTROL MODULE (BENEATH LEFT REAR SEAT, ON REAR FUSE BLOCK) BRN WIRE COMPUTER DATA LINES SYSTEM DATA FRONT AUXILIARY BLOWER MOTOR SWITCH GARAGE DOOR OPENER HEADLAMP SWITCH HOT AT ALL TIMES INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL INSTRUMENT PANEL CLUSTER LEFT QUARTER GLASS SWITCH LEFT REAR WINDOW SWITCH LONG WHEEL BASE LONG WHEELBASE LOWER LEFT UPPER RIGHT LOWER RIGHT LT GRN WIRE NCA WIRE POWER ROOF SWITCH (XUV) RADIO HVAC CONTROL MODULE REAR FUSE BLOCK (BELOW LEFT REAR SEAT) REAR WINDOW WIPER/ WASHER SWITCH RIGHT QUARTER GLASS SWITCH VOICE RECORDER RIGHT REAR WINDOW SWITCH SHORT WHEEL BASE SHORT WHEELBASE, XUV STEERING WHEEL CONTROL SWITCHES SUNROOF SWITCH TBC 2 FUSE 7 TBC 5 FUSE 32 TOWARD THE I/P AUXILIARY POWER BREAKOUT) TRACTION CONTROL SWITCH (GMC, CHEVY) TRACTION CONTROL SWITCH (OLDS, BUICK) TRANSFER CASE SHIFT CONTROL SWITCH UPPER LEFT WHT WIRE

4 6 7 9 BAT (+) MEMORY 1 SW MEMORY 2 SW ILLUM CTRL BLK WIRE BRN WIRE BRN/WHT WIRE CLASS 2 SERIAL DATA COMPUTER DATA LINES SYSTEM DK BLU WIRE DOWN UP DRIVER DOOR MODULE (BELOW DRIVER DOOR SWITCH PANEL) DRIVER MEMORY SEAT SWITCH EXIT MEM 1 MEM 2 FRONT PASSENGER DOOR MODULE (BELOW FRONT PASSENGER DOOR SWITCH PANEL) GRY WIRE LEFT HORIZONTAL DRIVER OUTSIDE REARVIEW MIRROR LT BLU WIRE ORG/ WIRE OUTSIDE REARVIEW MIRROR SWITCH PASS DRIVER PNK WIRE PPL PPL LOW REF VERT POS SIG HORIZ POS SIG MIR RIGHT CTRL MIR DOWN CTRL MIR COMMON RED WIRE RIGHT LEFT TAN WIRE UP LEFT VERTICAL HORIZONTAL DRIVER OUTSIDE REARVIEW MIRROR UP VERTICAL WHT WIRE WHT/BLK WIRE WHT/RED WIRE

1047 4240 CLASS 2 SERIAL DATA BATTERY 1340 1450 BATTERY GROUND 4140 1046 BATTERY CLASS 2 SERIAL DATA BATTERY GROUND BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DDM FUSE 10 DK BLU WIRE DOWN UP DRIVER DOOR MODULE (BELOW DRIVER DOOR PANEL SWITCH) FRONT PASSENGER DOOR MODULE (BELOW FRONT PASSENGER DOOR SWITCH PANEL) GRY WIRE HOT AT ALL TIMES LEFT HORIZONTAL DRIVER OUTSIDE REARVIEW MIRROR LT BLU WIRE LT DOORS CIRCUIT BREAKER 2 ORG/ WIRE OUTSIDE REARVIEW MIRROR SWITCH PASS DRIVER PDM FUSE 12 PNK WIRE PPL PPL LOW REF VERT POS SIG HORIZ POS SIG MIR RIGHT CTRL MIR DOWN CTRL MIR COMMON REAR FUSE BLOCK (BELOW LEFT REAR SEAT) RED WIRE RIGHT LEFT RT DOORS CIRCUIT BREAKER 1 TAN WIRE UP LEFT VERTICAL HORIZONTAL PASSENGER OUTSIDE REARVIEW MIRROR UP VERTICAL WHT/BLK WIRE WHT/RED WIRE

3-2 SS CTRL LOW REF 705 597 COOLING FANS SYSTEM A/C SYSTEM ABS SYSTEM BATT VOLT CLS 2 DATA CLS 2 DATA LOW REF CMP LOW REF BLK WIRE BLK/WHT WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE ENGINE COOLANT TEMPERATURE SENSOR (LEFT FRONT OF ENGINE BLOCK, NEAR GENERATOR) FAN CLUTCH INJ 7 CTRL INJ 4 CTRL FUSE 53 FUSE 54 GRY WIRE HOT AT ALL TIMES HOT IN ACCY, RUN, START HOT IN RUN, START IGN 0 FUSE 47 INJ 1 CTRL INJ 6 CTRL INJ 3 CTRL INJ 2 CTRL INJ A FUSE 55 INJ B FUSE 56 INJECTORS KS 1 SIGNAL KS 2 SIGNAL CKP SIG REQ TORQ SIG SERIAL DATA SERIAL DATA LOW REF GND LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE ORG/BLK WIRE PNK 1 2 3 4 5 WIRE PNK PNK 26 27 WIRE PNK PNK 6 7 8 9 10 WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (LOWER LEFT FRONT OF ENGINE) PPL PPL PPL PPL/WHT WIRE PRND A SIG TCC/BRK SIG PRND P SIG PPL PRND B SIG CMP SIG ECT SIG IGN 0 VOLT INJ 5 CTRL INJ 8 CTRL RANGE B RANGE C IGN 1 VOLT BATT VOLT LOW REF REAR FUSE BLOCK (BELOW LEFT REAR SEAT) RED WIRE RED/BLK WIRE START RELAY GND STARTING/ CHARGING SYSTEM TAN WIRE TAN/WHT WIRE TFT LOW REF MAP LOW REF UNDERHOOD FUSE BLOCK (LEFT SIDE OF ENGINE COMPT) PCM B FUSE 10 WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE