Cadillac STS I facelift (2007-2011) tan/blk Wiring diagrams

1 2 3 4 5 6 IGNITION 1 VOLTAGE 3 27 GND 5 V REF LO REF SENS SIG 42 55 52 SERIAL DATA BUS + SERIAL DATA BUS - TCC/CRUISE CONTROL RELEASE SIG ACCELERATOR PEDAL POSITION (APP) SENSOR (ATTACHED TO TOP OF ACCELERATOR PEDAL) AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BRAKE PEDAL POSITION SENSOR (ATTACHED TO TOP OF BRAKE PEDAL ASSEMBLY) BRN WIRE CCP/RLY COILS FUSE COMPUTER COMPUTER DATA LINES DATA LINES SYSTEM SYSTEM COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH CRUISE IND CRUISE SW SIG 21 22 SERIAL DATA GMLAN SERIAL DATA GMLAN DISPLAY DISTANCE SENSING CRUISE CONTROL MODULE (BEHIND FRONT FASCIA, NEAR HOOD LATCH) DK BLU WIRE DK GRN WIRE DRIVER INFORMATION CENTER (DIC) ECM/TCM IGN FUSE ENGINE CONTROL MODULE (ECM) (FRONT OF ENGINE, ON RIGHT VALVE COVER) GMLAN SERIAL DATA GMLAN SERIAL WAKE UP GMLAN SERIAL DATA + GMLAN SERIAL DATA - GROUND GRY WIRE HEAD UP DISPLAY (HUD) (IF EQUIPED) HOT AT ALL TIMES HOT W/ RUN/CRANK RELAY ENERGIZED IGNITION INSTRUMENT PANEL CLUSTER (IPC) INSTRUMENT PANEL MODULE (IPM) (RIGHT SIDE OF DASH, BEHIND GLOVE BOX) LOGIC LT BLU WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL ACCY SUPPLY PPL PPL SOUND SYSTEMS RED WIRE RED/WHT WIRE TAN WIRE TAN/BLK WIRE TCC/CRS CNTL THROTTLE BODY ASSEMBLY (TOP FRONT OF ENGINE) TRANSMISSION CONTROL MODULE (TCM) TURN SIGNAL/MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

1 2 3 4 5 6 IGNITION 1 VOLTAGE 2500 2501 COMPUTER DATA LINES SYSTEM 3 27 GND 5 V REF LO REF SENS SIG 4.6L 53 33 SERIAL DATA BUS + SERIAL DATA BUS - ACCELERATOR PEDAL POSITION (APP) SENSOR (ATTACHED TO TOP OF ACCELERATOR PEDAL) AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BRAKE PEDAL POSITION SENSOR (ATTACHED TO TOP OF BRAKE PEDAL ASSEMBLY) BRN WIRE CCP/RLY COILS FUSE COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH CRUISE IND CRUISE SW SIG 21 22 SERIAL DATA GMLAN SERIAL DATA GMLAN DISPLAY DISTANCE SENSING CRUISE CONTROL MODULE (BEHIND FRONT FASCIA, NEAR HOOD LATCH) DK BLU WIRE DK GRN WIRE DRIVER INFORMATION CENTER (DIC) ECM/TCM IGN FUSE GMLAN SERIAL DATA GMLAN SERIAL WAKE UP GMLAN SERIAL DATA + GMLAN SERIAL DATA - GROUND GRY WIRE HEAD UP DISPLAY (HUD) (IF EQUIPED) HOT AT ALL TIMES HOT W/ RUN/CRANK RELAY ENERGIZED IGNITION INSTRUMENT PANEL CLUSTER (IPC) INSTRUMENT PANEL MODULE (IPM) (RIGHT SIDE OF DASH, BEHIND GLOVE BOX) LOGIC LT BLU WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL ACCY SUPPLY PPL PPL SOUND SYSTEMS RED WIRE RED/WHT WIRE TAN WIRE TAN/BLK WIRE TCC/CRS CNTL TCC/CRUISE CNTL REL SIG THROTTLE BODY ASSEMBLY (TOP FRONT OF ENGINE) TRANSMISSION CONTROL MODULE (TCM) TURN SIGNAL/MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

1 2 3 4 5 6 IGNITION 1 VOLTAGE 2500 2501 COMPUTER DATA LINES SYSTEM 3 27 GND 5 V REF LO REF SENS SIG 4.6L 53 33 SERIAL DATA BUS + SERIAL DATA BUS - ACCELERATOR PEDAL POSITION (APP) SENSOR (ATTACHED TO TOP OF ACCELERATOR PEDAL) AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BRAKE PEDAL POSITION SENSOR (ATTACHED TO TOP OF BRAKE PEDAL ASSEMBLY) BRN WIRE CCP/RLY COILS FUSE COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH CRUISE IND CRUISE SW SIG 21 22 SERIAL DATA GMLAN SERIAL DATA GMLAN DISPLAY DISTANCE SENSING CRUISE CONTROL MODULE (BEHIND FRONT FASCIA, NEAR HOOD LATCH) DK BLU WIRE DK GRN WIRE DRIVER INFORMATION CENTER (DIC) ECM/TCM IGN FUSE GMLAN SERIAL DATA GMLAN SERIAL WAKE UP GMLAN SERIAL DATA + GMLAN SERIAL DATA - GROUND GRY WIRE HEAD UP DISPLAY (HUD) (IF EQUIPED) HOT AT ALL TIMES HOT W/ RUN/CRANK RELAY ENERGIZED IGNITION INSTRUMENT PANEL CLUSTER (IPC) INSTRUMENT PANEL MODULE (IPM) (RIGHT SIDE OF DASH, BEHIND GLOVE BOX) LOGIC LT BLU WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL PPL ACCY SUPPLY PPL PPL SOUND SYSTEMS RED WIRE RED/WHT WIRE TAN WIRE TAN/BLK WIRE TCC/CRS CNTL TCC/CRUISE CNTL REL SIG THROTTLE BODY ASSEMBLY (TOP FRONT OF ENGINE) TRANSMISSION CONTROL MODULE (TCM) TURN SIGNAL/MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

3.6L, 4.6L W/O TRAILER PROVISIONS 4.4L, 4.6L 3.6L 4.4L, 4.6L W/ TRAILER PROVISIONS 4.6L 4.4L 3.6L BLK WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE ECT SENSOR SIGNAL ENGINE COOLING FAN ENGINE COOLING FAN RESISTOR FAN 1 FUSE FAN-2 FUSE GRY WIRE HI FAN SPD RELAY HI SPD FAN RLY CTRL HOT AT ALL TIMES HOT W/ PWR/ TRN RELAY ENERGIZED LEFT ENGINE COOLING FAN (BEHIND RADIATOR) LO FAN SPD RELAY LOW REFERENCE LOW SPD FAN RLY CTRL LT BLU WIRE POST 02 SNSR FUSE RIGHT ENGINE COOLING FAN (BEHIND RADIATOR) S/P FAN RELAY SERIAL DATA BUS- TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) WHT WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PNK IGN WIRE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 BATT POSITIVE VOLT 1 2 GND BATT POSITIVE VOLT ACTR FRT ACTIVE SIG MTR W ACTR FRT ACTIVE SIG U GND ACTR FRT ACTIVE SIG W ACTR FRT ACTIVE SIG V ACTR FRT ACTIVE SIG GND ACTR FRT ACTIVE SIG V ACTR FRT ACTIVE SIG MTR U BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE CAN BUS HIGH SERIAL DATA CAN BUS LOW SERIAL DATA SERIAL DATA + SERIAL DATA - COMPUTER DATA LINES SYSTEM ELECTRONIC BRAKE CONTROL MODULE (EBCM) (RIGHT FRONT CORNER OF ENGINE COMPT) GRN WIRE GRN/RED WIRE GRY WIRE HOT AT ALL TIMES AFS FUSE FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) HOT W/ RUN RELAY ENERGIZED IGN 3 FUSE J/C LEFT REAR FUSE BLOCK (UNDER LEFT SIDE OF REAR SEAT) LT GRN WIRE LT GRN/BLK WIRE PNK WIRE POWER STEERING CONTROL MODULE (PSCM) (LEFT SIDE OF DASH, ABOVE PARK BRAKE PEDAL) RED WIRE RED/BLK WIRE RED/WHT WIRE SERIAL DATA WAKEUP STEERING ANGLE SENSOR TAN WIRE TAN/BLK WIRE TAN/WHT WIRE UNDERHOOD UPPER INTERMEDIATE STEERING SHAFT WHT WIRE YEL WIRE

ABS MTR FUSE ANTI-LOCK BRAKES SYSTEM BLK WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY INSTRUMENT PANEL CLUSTER (IPC) ECM/TCM/IGN FUSE GRY WIRE HIGH LOW GND SERIAL SERIAL DATA DATA HOT AT ALL TIMES HOT W/ RUN/ CRNK RELAY ENERGIZED ING 1 LOGIC LT GRN WIRE PNK IGN 1 VOLT GMLAN SERIAL DATA WIRE PNK WIRE RED WIRE RED/BLK WIRE TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) VARIABLE EFFORT STEERING ACTUATOR (IN LEFT REAR ENGINE COMPT, ON STEERING RACK) WHT WIRE

AUTOMATIC LEVEL ELEC RELAY CTRL BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM 2500 1206 COMPUTER DATA LINES SYSTEM 2500 1212 DATA SIGNAL BATTERY VOLTAGE DK GRN WIRE DRIVER INFORMATION CENTER (DIC) DISPLAY EKM/I/P MDL FUSE ELC CMPRSR FUSE ELC CMPRSR RELAY ELECTRONIC SUSPENSION CONTROL (ESC) MODULE (BELOW RIGHT "C" PILLAR) GMLAN SER DATA - GMLAN SER DATA + SENSOR LOW REF RR DAMPING INCREASE GMLAN SER DATA - GMLAN SER DATA + SENSOR LOW REF SENSOR LOW REF GRN WIRE GRY WIRE HIGH SERIAL DATA LO SERIAL DATA HOT AT ALL TIMES HOT W/ RUN RELAY ENERGIZED IPC CLASS 2 LEFT FRONT SHOCK ABSORBER ACTUATOR (TOP OF LEFT FRONT STRUT TOWER) LEFT FRONT SUSPENSION POSITION SENSOR (NEAR LEFT FRONT STRUT) LEFT REAR FUSE BLOCK (UNDER LEFT SIDE OF REAR SEAT) LEFT REAR SHOCK ABSORBER ACTUATOR (TOP OF LEFT REAR STRUT TOWER) LEFT REAR SUSPENSION POSITION SENSOR (NEAR LEFT REAR STRUT) LF POSITION SENS RF POSITION SENS RR POSITION SENS LF SENS VOL REF RF SENS VOL REF LR SENS VOL REF RR SENS VOL REF LOGIC INSTRUMENT PANEL CLUSTER (IPC) LR DAMPING CTRL LR DAMPING CTRL RF RAID CTRL LF DAMPING CTRL LR POSITION SENS LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MRTD MDL FUSE ELC EXH FUSE NCA WIRE ORG/ WIRE ORG/BLK WIRE PPL PPL RR DAMPING DECREASE RF DAMPING CTRL LF DAMPING INCREASE GROUND PPL/WHT WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE RIGHT FRONT SHOCK ABSORBER ACTUATOR (TOP OF RIGHT FRONT STRUT TOWER) RIGHT FRONT SUSPENSION POSITION SENSOR (NEAR RIGHT FRONT STRUT) RIGHT REAR SHOCK ABSORBER ACTUATOR (TOP OF RIGHT REAR STRUT TOWER) RIGHT REAR SUSPENSION POSITION SENSOR (NEAR RIGHT REAR STRUT) SENSOR LOW REF TAN WIRE TAN/BLK WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

20 21 22 PPL BANK 1 SENS 1 BANK 1 SENSOR 1 BANK 2 SENS 1 BANK 2 SENSOR 1 BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CANISTER PURGE SOLENOID VALVE CONNECTOR) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECT SENS SIG ENGINE CONTROL MODULE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (IN CENTER OF LEFT CYLINDER HEAD) FUEL INJ 1 CTRL FUEL INJ 4 CTRL GRY WIRE IC 2 CTRL IC 4 CTRL IC 6 CTRL IGN 1 VOLT KNOCK SENS 1 SIG KNOCK SENS 2 SIG KNOCK SENSOR (KS) BANK 1 (ON RIGHT SIDE OF ENGINE) KNOCK SENSOR (KS) BANK 2 (ON LEFT SIDE OF ENGINE) LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE NCA WIRE OIL PRESS SENS SIG ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK/BLK WIRE PPL PPL 28 29 PPL/WHT WIRE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TP SENS 1 SIG TP SENS 2 SIG WHT/BLK WIRE YEL WIRE

459 473 335 1272 1274 1164 6289 AIR CONDITIONING SYSTEM COOLING FANS SYSTEM 5514 447 492 2709 1161 STARTING/CHARGING SYSTEM 5728 2500 COMPUTER DATA LINES SYSTEM A/C REFRIGERANT PRESSURE SENSOR ACCELERATOR PEDAL POSITION (APP) SENSOR (ATTACHED TO TOP OF ACCELERATOR PEDAL) BANK 1 SENS 2 BANK 1 SENSOR 2 BANK 2 SENSOR 2 BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM/TCM IGN FUSE ECM/TCM SERIAL DATA WAKE UP HI SPD GMLAN SERIAL DATA BUS (+) ENGINE CONTROL MODULE (ECM) (FRONT OF ENGINE, ON RIGHT VALVE COVER) EVAP CANISTER VENT SOL CTRL GRN DK WIRE GRY WIRE HOT W/ RUN/ CRNK RELAY ENERGIZED IGN 1 VOLT IGN LK CYL CTRL ACTR SIG INSTRUMENT PANEL CLUSTER (IPC) LOGIC LO SPD GMLAN SERIAL DATA LOW REF 5 VOLT REF 3 FUEL LVL SENS SIG LT BLU WIRE MAIN RLY CTRL MALFUNCTION IND NCA WIRE ORG/BLK WIRE ORG/WHT WIRE PNK IGN 1 VOLT GMLAN SERIAL DATA BUS (-) BATT POSITIVE VOLT WIRE PNK WIRE PNK/BLK WIRE PPL PPL (BANK 1 SENS 2) A/C REFRIG PRESS SENS SIG PPL (BANK 2 SENS 2) 52 53 54 55 56 57 58 STOP LAMP SW SIG RED/WHT WIRE RUN/ CRANK IGN 1 VOLT IGN SENS SIG SENSOR 2 CONNECTOR) TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) WHT WIRE WHT/BLK BRN WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

2501 6120 2761 COMPUTER DATA LINES SYSTEM 335 3223 COOLING FANS SYSTEM 5 VOLT REF 1 5 VOLT REF 5 VOLT REF 1 BANK 2 SENS 2 BAROMETRIC PRESSURE (BARO) SENSOR (TOP RIGHT SIDE ENGINE) BLK WIRE BLK/WHT WIRE BRN WIRE CNSTR VENT FUSE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE (ECT) SENSOR (REAR OF RIGHT CYLINDER HEAD) EVAP CNSTR PURGE SOL CTRL LO SPD COOLING FAN RLY CTRL FUEL PUMP FUEL PUMP RELAY GENERATOR FIELD DUTY CYCLE SIG GENERATOR TURN ON SIG GROUND GRY WIRE GRY/BLK WIRE HI SPD GMLAN BUS + HI SPD GMLAN SERIAL DATA BUS - IAT 2 LOW REF LOW REF HOT AT ALL TIMES HOT AT ALL TIMES FUEL PUMP FUSE J/C LEFT FUEL TANK SENSOR LOW REF BARO SENS LOW REF LOW REF LT BLU WIRE LT GRN WIRE OIL LEVEL SW SIG ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PARK/NEUTRAL SIG PNK WIRE PPL PPL/WHT WIRE RED/WHT WIRE RIGHT REAR FUSE BLOCK (UNDER STARTING/ CHARGING SYSTEM STARTING/CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TRANSMISSIONS SYSTEM VACUUM BYPASS VLV CTRL HTR LO CTRL (BANK 2 SENS 1) COOLANT PUMP RLY CTRL WHT/BLK WIRE YEL WIRE YEL/BLK WIRE