Buick LaCrosse I (2004-2009) Wiring diagram engine performance 3.8l vin 2

5 VOLT REF 1 5 VOLT REF 1 5 VOLT REF 1 BLK WIRE BLK/WHT WIRE BRN WIRE CMP SENSOR LOW ENG SPEED MED ENG SPEED LOW REF LOW REF OIL LEVEL SW DK BLU WIRE DK GRN/WHT WIRE ECT SENSOR SIG EGR SOL HIGH EGR SOL LOW ENGINE COOLANT TEMPERATURE SENSOR (ON TOP RIGHT OF INTAKE MANIFOLD) ENGINE OIL PRESSURE SWITCH (BELOW POWER STEERING PUMP) EVAP PURGE SOL EVAPORATIVE EMISSION (EVAP) CANISTER PURGE SOLENOID VALVE (TOP, REAR OF ENGINE) GEN FIELD KNOCK SENSOR 1 GEN ON SIG GENERATOR GROUND GRY WIRE HEATED OXYGEN IC TIMING CTRL KNOCK SENSOR (KS) 1 (FRONT LEFT SIDE OF ENGINE) KNOCK SENSOR (KS) 2 (RIGHT SIDE OF ENGINE, BELOW EXHAUST MANIFOLD) LOW REF LT BLU WIRE LT BLU/BLK WIRE LT GRN WIRE LT GRN/BLK WIRE MAP SENSOR SIG NCA WIRE OIL PRESS SIG KNOCK SENSOR 2 AIR SOL CTRL ORG/BLK WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL/WHT WIRE RED WIRE RED/BLK WIRE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE WHT WIRE YEL WIRE YEL/BLK WIRE

5 VOLT REF AAP SENSOR 1 ACCELERATOR PEDAL POSITION SENSOR (ABOVE ACCELERATOR PEDAL) APP SENSOR 2 BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BEHIND LEFT SIDE OF DASH, LEFT OF STEERING COLUMN) BREAKOUT, TOWARDS ICM) BRN WIRE BRN/WHT WIRE DK BLU WIRE DK GRN WIRE ELEK IGN FUSE 24 ETC FUSE 17 FROM P/TRAIN RELAY (DIAGRAM 4 OF 5) FUEL INJ FUSE 20 GROUND GRY WIRE HOT IN RUN OR START IGN 1 VOLT IGNITION CONTROL MODULE (ICM) (TOP LEFT FRONT OF ENGINE) LOW REF LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE ORG/BLK WIRE PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL/WHT WIRE PRIMARY UART RED/BLK WIRE SEC UART SECONDARY AIR INJECTION SOLENOID RELAY (PZEV) (NEAR AIR CLEANER DUCT) SPARK PLUGS STOP LAMP STOP LAMP SWITCH SIGNAL TAN WIRE TAN/BLK WIRE TAN/WHT WIRE THROTTLE ACTUATOR CONTROL MODULE (AT THROTTLE BODY) TRANS SOL FUSE 21 UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) VEHICLE SPD WHT WIRE WHT/BLK WIRE YEL WIRE

1-2 SHIFT SOLENOID 2-3 SHIFT SOLENOID A/T FLUID TEMP SENSOR AIR PRES SENS AT ISS SIG AUTOMATIC TRANSMISSION PRESSURE CONTROL SOLENOID BLK WIRE BLK/WHT WIRE BOOST SOL BRN WIRE DK BLU/WHT WIRE DK GRN WIRE GRY WIRE IAT SENSOR SIG INPUT SHAFT SPEED SENSOR LOW REF LT BLU WIRE LT BLU/WHT WIRE LT GRN WIRE MAF SENSOR SIG NEAR AIR CLEANER ASSEMBLY) ORG/ WIRE PC SOL PNK PNK WIRE PNK WIRE POWERTRAIN CONTROL MODULE (LEFT SIDE OF ENGINE COMPARTMENT) PPL RED WIRE RED/BLK WIRE SHIFT SOL TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TCC RELEASE SWITCH TCC SOL TCC SW SIG TFT SENSOR SIG TORQUE CONVERTER CLUTCH SOLENOID TR SW A TR SW B TR SW C TR SW P TRANSMISSION INTERNAL MODE SWITCH VEHICLE SPEED SENSOR (RIGHT SIDE OF TRANSMISSION, NEAR RIGHT AXLE SHAFT) VSS SIG WHT WIRE YEL WIRE YEL/BLK WIRE

AIR PUMP FUSE 25 BLK WIRE BLK/WHT WIRE BRN WIRE CNSTR FUSE DK GRN WIRE DK GRN/WHT WIRE EMISSION FUSE 12 FUEL PP FUSE 22 FUEL PP RELAY 41 FUSE 14 GRY WIRE HEATED OXYGEN HOT AT ALL TIMES HOT AT ALL TIMES I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) MAF IAT NCA WIRE ORG/ WIRE P/TRAIN RELAY 40 PNK PNK WIRE PNK WIRE PPL RED WIRE SECONDARY AIR INJECTION PUMP (PZEV) (NEAR TRANSMISSION STUD, LEFT OF STARTER) SECONDARY AIR INJECTION PUMP RELAY (PZEV) (NEAR AIR CLEANER DUCT) TAN WIRE TAN/WHT WIRE TO P/TRAIN FUSES (DIAGRAM 2 OF 5) UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) W/O STABILITY CONTROL WHT WIRE YEL WIRE

12 2 1 B+ CLASS 2 GND IGN 5-VOLT REF 1 5-VOLT REF 2 A/C PRESS SIG STOP LAMP SW A/C CLUTCH RELAY RELAY CTRL AIR CONDITIONING SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE CLASS 2 DATA CLSTR FUSE COOLING FANS SYSTEM CRUISE CONTROL SYSTEM DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE COMPARTMENT, NEAR AIR CLEANER ASSEMBLY) EVAP VENT SOL FUEL PUMP RELAY FUEL PUMP, SENDER ASSEMBLY FUEL TANK DK FUEL TANK PRESS FUEL TANK PRESSURE SENSOR GRN WIRE GRY WIRE HIGH FAN HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK (BEHIND RIGHT SIDE OF DASH) IGNITION SWITCH INSTRUMENT PANEL CLUSTER LOCK LOGIC LOW FAN LOW REF MALFUNCTION INDICATOR LAMP (MIL) MIL CONTROL LOW REF LOW REF NAVIGATION SYSTEM NCA WIRE ORG/ WIRE PCM FUSE 15 PNK WIRE POWERTRAIN CONTROL MODULE (LEFT SIDE OF PPL PPL FUEL LEVEL SIG CRUISE SIG RED/BLK WIRE RUN WIRE STARTING/CHARGING SYSTEM UNDERHOOD FUSE BLOCK (MOUNTED TO RIGHT STRUT TOWER) WHT WIRE YEL/BLK WIRE