Diagram sections — 31 (72 total)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT BODY CONTROL MODULES COMPUTER DATA LINES COOLING FAN CRUISE CONTROL DEFOGGERS ELECTRONIC POWER STEERING ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS NAVIGATION POWER DISTRIBUTION POWER DOOR LOCKS POWER MIRRORS POWER SEATS POWER TOP/SUNROOF POWER WINDOWS RADIO SHIFT INTERLOCK STARTING/CHARGING SUPPLEMENTAL RESTRAINTS TRANSMISSION TRUNK, TAILGATE, FUEL DOOR WARNING SYSTEMS WIPER/WASHER
AIR CONDITIONING
3.6L VIN 7 3.6L VIN 7, Automatic A/C Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006 List of elements for 3.6L VIN 7, Automatic A/C Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006: 74 (in back of right headlamp on frame) g100 (in engine wiring harness, approximately 20 cm from g115) (w/ sulev) s114 (mounted to bank no 1 cylinder head above exhaust manifold) g115 (on front of a/c compressor) a/c compressor clutch A/c clu diode A/c clutch fuse 13 10a A/c comp relay A/c compressor clutch solenoid A/c compressor temperature switch A/c request ind A/c request switch A10 A11 A12 A18 A19 Air temp a Air temp b Auto B10 B11 B12 Battery Blower motor sw C18 C19 Class 2 serial Computer data lines system interior lights system Defogger E10 Fan 1 fuse 29 30a Fan 1 relay Fan 2 fuse 32 30a Fan 2 relay Fan 3 relay G202 (left side of dash, at base of steering column) Ground High Hot at all times Hot in run or start Hvac control module (center of dash) Ign 1 volt Illum Ind K14 K15 K18 K19 L14 Left air temperature actuator (left side of hvac module) Logic Low Low ref Lower left air temperature sensor Lower right air temperature sensor M14 M15 M18 M19 Mode actuator (on lower right side of dash) Mode door Nca Off Pnk Rear defogger switch Recirculation a Recirculation actuator (in right footwell) Recirculation b Right air temperature actuator (right side of hvac module) S211 (in dash harness, at center of dash) Sensor sig Speed ctrl Tan Underhood fuse block (mounted to right strut tower) 3.6L VIN 7, Automatic A/C Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006 List of elements for 3.6L VIN 7, Automatic A/C Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006: 42 (in dash harness, at center of dash) s211 (in off-engine wiring harness, approximately 32 cm from underhood fuse block towards transmission control module) 5v reference 2 A/c comp clutch A/c press signal A/c refrigerant pressure sensor (on left side of engine compt, on accumulator) Batt main 4 fuse 30 30a Battery Blower motor (behind right side of dash, in hvac module) Blower motor control processor (on lower right side of dash) Class 2 serial Computer data lines system D11 Display fuse 18 10a Ect sens sig Engine control module (ecm) (top of engine) Engine controls system Engine coolant temperature (ect) sensor (left side of engine block, above exhaust manifold) G200 (center of dash cross beam, behind radio) G202 (left side of dash, at base of steering column) Gnd Hot at all times Hot in run or start Hvac fuse 10a I/p fuse block (behind left side of dash) Ign 1 volt Inside air temperature sensor (left side of dash) Left cooling fan motor (on left side of radiator) Low ref Pnk Red Relay ctrl Right cooling fan motor (on right b S118 S119 (in on-engine wiring harness, approximately 34.5 cm from engine control module) S213 (in dash harness, at center of dash) Speed ctrl Sunload sensor assembly (top center of dash) Tan Underhood fuse block (mounted to right strut tower) Upper left air temperature sensor (center of dash, in left ventilation duct) Upper right air temperature sensor (center of dash, in right ventilation duct) 3.6L VIN 7, Compressor Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.6L VIN 7, Compressor Wiring Diagram for Buick LaCrosse CX 2006: 36 (in engine wiring harness, approximately 20 cm from g115) (w/ sulev) s114 (in off-engine wiring harness, approximately 32 cm from underhood fuse block towards transmission control module) (mounted to bank no. 1 cylinder head above exhaust manifold) g115 (on front of a/c compressor) a/c compressor clutch 5v reference 2 A/c clu diode A/c clutch fuse 13 10a A/c comp clutch A/c comp relay A/c compressor clutch solenoid A/c compressor temperature switch A/c press signal A/c refrigerant pressure sensor (on left side of engine compt, on accumulator) A/c request ind A/c request switch Battery Class 2 serial Computer data lines system Display fuse 18 10a Engine control module (ecm) (top of engine) Engine controls system G202 (left side of dash, at base of steering column) Ground Hot at all times Hot in run or start Hvac control module (center of dash) Hvac fuse 10a I/p fuse block (behind left side of dash) Ign 1 volt Logic Low ref Nca Pnk S118 S211 (in dash harness, at center of dash) Underhood fuse block (mounted to right strut tower)
3.8L VIN 2 3.8L VIN 2, Automatic A/C Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Automatic A/C Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006: 72 (in back of right headlamp on frame) g100 (in engine wiring harness, approximately 20 cm from g115) (w/ sulev) s114 (on front of a/c compressor) a/c compressor clutch (on transmission stud, to right of starter) g115 A/c clu diode A/c clutch fuse 13 10a A/c comp relay A/c request ind A/c request switch A10 A11 A12 A18 A19 Air temp a Air temp b Auto B10 B11 B12 Battery Blower motor sw C18 C19 Class 2 serial Computer data lines system Defogger E10 Fan 1 fuse 29 30a Fan 1 relay Fan 2 fuse 32 30a Fan 2 relay Fan 3 relay G202 (left side of dash, at base of steering column) Ground High Hot at all times Hot in run or start Hvac control module (center of dash) Ign 1 volt Illum Ind Interior lights system K14 K15 K18 K19 L14 Left air temperature actuator (left side of hvac module) Logic Low Low ref Lower left air temperature sensor Lower right air temperature sensor M14 M15 M18 M19 Mode actuator (on lower right side of dash) Mode door Off Pnk Rear defogger switch Recirculation a Recirculation actuator (in right footwell) Recirculation b Right air temperature actuator (right side of hvac module) S211 (in dash harness, at center of dash) Sensor sig Speed ctrl Tan Underhood fuse block (mounted to right strut tower) 3.8L VIN 2, Automatic A/C Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Automatic A/C Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006: 38 (in dash harness, at center of dash) s211 5v reference 1 A/c comp clutch A/c press signal A/c refrigerant pressure sensor (on left side of engine compt, on accumulator) Batt main 4 fuse 30 30a Battery Blower motor (behind right side of dash, in hvac module) Blower motor control processor (on lower right side of dash) Class 2 serial Computer data lines system D11 Display fuse 18 10a Ect sens sig Engine coolant temperature (ect) sensor (on top right of intake manifold) G200 (center of dash cross beam, behind radio) G202 (left side of dash, at base of steering column) Gnd Hot at all times Hot in run or start Hvac fuse 10a I/p fuse block (behind left side of dash) Ign 1 volt Inside air temperature sensor (left side of dash) Left cooling fan motor (on left side of radiator) Low ref Pnk Powertrain control module (pcm) Red Relay ctrl Right cooling fan motor (on right b S213 (in dash harness, at center of dash) Speed ctrl Sunload sensor assembly (top center of dash) Tan Underhood fuse block (mounted to right strut tower) Upper left air temperature sensor (center of dash, in left ventilation duct) Upper right air temperature sensor (center of dash, in right ventilation duct) 3.8L VIN 2, Compressor Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Compressor Wiring Diagram for Buick LaCrosse CX 2006: 33 (dash harness, at center of dash) s211 (engine harness, 20cm from g115) (on front of a/c compressor) a/c compressor clutch (w/ sulev) s114 5v reference A/c clu diode A/c clutch fuse 13 10a A/c comp clutch A/c comp relay A/c press signal A/c refrigerant pressure sensor (on left side of engine compt, on accumulator) A/c request ind A/c request switch Automatic a/c Battery Class 2 serial Computer data lines system Display fuse 18 10a G115 (on transaxle stud, to right of starter) G202 (left side of dash, at base of steering column) Ground Hot at all times Hot in run or start Hvac control module (center of dash) Hvac fuse 10a I/p fuse block (behind right side of dash) Ignition 1 Logic Low ref Manual a/c Pnk Powertrain control module (pcm) (left front side of engine compt, in air cleaner assembly) Underhood fuse block (mounted to right strut tower) 3.8L VIN 2, Manual A/C Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Manual A/C Wiring Diagram for Buick LaCrosse CX 2006: 93 (in dash harness, at center of dash) s211 (in engine wiring harness, approxi- mately 20 cm from g115) (on front of a/c compressor) a/c compressor clutch (w/ sulev) s114 5v reference 1 A/c clu diode A/c clutch fuse 13 10a A/c comp clutch A/c comp relay A/c press signal A/c refrigerant pressure sensor (on left side of engine compt, on accumulator) A/c request ind A/c request switch A10 A11 A12 A18 A19 Air temp a Air temp b Air temperature actuator B10 B11 B12 Batt main 4 fuse 30 30a Battery Blower motor (behind right side of dash, in hvac module) Blower motor control processor (on lower right side of dash) Blower motor sw C18 C19 Class 2 serial Computer data lines system Defogger Display fuse 18 10a E10 Ect sens sig Engine coolant temperature (ect) sensor (on top right of intake manifold) Fan 1 fuse 29 30a Fan 1 relay Fan 2 fuse 32 30a Fan 2 relay Fan 3 relay G100 (in back of right headlamp on frame) G115 (on transmission stud, to right of starter) G200 (center of dash cross beam, behind radio) G202 (left side of dash, at base of steering column) Gnd Ground High High spd cooling Hot at all times Hot in run or start Hvac control module (center of dash) Hvac fuse 10a I/p fuse block (behind left side of dash) Ignition 1 Illum Ind Interior lights system K14 K15 K18 K19 L14 Left cooling fan motor (on left side of radiator) Logic Low Low ref Low spd cooling M14 M15 M18 M19 Mode actuator (on lower right side of dash) Mode door Mode switch Off Pnk Powertrain control module (pcm) Rear defogger switch Recirculation Recirculation a Recirculation actuator (in right footwell) Recirculation b Recirculation switch Red Right cooling fan motor (on right side of radiator) S213 (in dash harness, at center of dash) Speed ctrl Tan Temperature control sw Underhood fuse block (mounted to right strut tower)
ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006 List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006: 74 (left side of engine compt, part of brake pressure modulator valve) electronic brake control module (ebcm) 3.6l 3.6l w/ active brake control 3.8l 5-volt reference A11 A2 c2 A9 c1 Abs fuse 23 10a Abs mtr fuse 31 40a Abs sol fuse 19 25a Abs/tcs class 2 serial data B+ motor control B+ sol valve control Battery Brake pressure modulator valve (bpmv) Brake pressure sensor signal C2 c4 C5 c1 Computer data lines system Del torque sig Delivered torque signal Ecm class 2 ser data Eng speed sig Eng speed sig (3.8l) Engine control module (3.6l) (top of engine) Engine controls system G115 (3.6l: mounted to bank 1 cylinder head above exhaust manifold) (3.8l: on transmission stud, to right of starter) Ground Hi spd gmlan ser data + Hi spd gmlan ser data - (3.6l) Hot at all times Hot in run or start Hsv 2 (w/ tcs) Hsv1 (w/ tcs) Ign 1 Lateral accelerometer signal Left front inlet Left front outlet Left rear inlet Left rear outlet Lf wheel speed sens low ref Lf wheel speed sens sig Lr wheel speed sens low ref Lr wheel speed sens sig Magnasteer actuator (w/magnetic speed variable assist steering power) (left rear of engine compt, behind transaxle) Pcm class 2 ser data Pnk Powertrain control module (3.8l) Pump motor Red Req torque sig Requested torque signal Rf wheel speed sens low ref Rf wheel speed sens sig Right front inlet Right front outlet Right rear inlet Right rear outlet Rr wheel speed sens low ref Rr wheel speed sens sig Solenoid valves Stop lamp sw sig Tan Underhood fuse block (mounted to right strut tower) Usv 1 (w/ tcs) Usv 2 (w/ tcs) Var effort steer act cntrl Var effort steer act pwr W/ active brake control W/ traction control W/o active brake control Yaw rate sensor signal Yaw rate sensor test control Anti-lock Brakes Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006 List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006: 45 (left side of dash, at base of steering column) g202 (on left front bearing & hub assembly) left front wheel speed sensor (wss) (on left rear bearing & hub assembly) (on right front bearing & hub assembly) right front wheel speed sensor (wss) (on right rear bearing & hub assembly) right rear wheel speed sensor (wss) 10v ref 5v ref Abs ind Abs/tcs class 2 ser data Bcm class 2 ser data Body control module (bcm) (behind left side of dash, left of steering column) Brake fluid pressure sensor (rear side of the electronic brake control module (ebcm)) Brake pedal position sensor (under left side of dash) Computer data lines system Ground Hi spd gmlan ser data + Hi spd gmlan ser data - If equipped Ign 1 volt Instrument panel cluster (ipc) Ipc class 2 ser data Lateral accelerometer sig Left rear wheel speed sensor (wss) Lo traction Logic Low ref Message center Nca Pnk Red S211 S216 (in i/p wiring harness, inside passenger compt approximately 14 cm (5.5 in) from pass-through to brake fluid level switch) Sensor) Steering angle sensor (in steering column) Stop lamp sw sig Stop lmp sw sig Tan Tcs fail Traction control (uplevel) Traction control off ind Traction control switch (center of instrument panel, next to driver information display (dic) switch assembly) Traction control switch sig Yaw & lateral acceleration sensor (under the rear side of center console) Yaw rate sen sig Yaw rate test cntrl
ANTI-THEFT Forced Entry Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Forced Entry Wiring Diagram for Buick LaCrosse CX 2006: 75 (if equipped) rear window antenna grid (in body wiring harness, below right front passenger seat, approximately 26 cm from second breakout to g301, towards inflatable restraint sensing & diagnostic module) s315 (in body wiring harness, below right side of front passenger seat, approximately 29 cm from second breakout to inline connector c311, towards inflatable restraint sensing & diagnostic module) (inside left door sill, forward of left front seat) g301 (on right side of rear package shelf) remote control door lock receiver (rcdlr) A5 c2 Ajar Ajar sw sig Antenna sig Bcm class 2 Body control module (bcm) (behind left side of dash, left of steering column) Class 2 Coax Computer data lines system Door ajar Door ajar indicator Door lock actuator Door lock ajar indicator switch Door lock cylinder switch Door lock open indicator switch Dr ajar sw sig Dr open sw sig Dr/lck trunk fuse 15a Driver door lock (in driver's door) Driver door lock switch Enable sig Front passenger door lock (in front passenger's door) Front passenger door lock switch G202 (left side of dash, at base of steering column) G301 (inside left door sill, forward of left front seat) G302 (in right door sill, forward of right front seat) Ground Headlights system exterior lights system Hi beam relay Horn rly ctrl Horns system Hot at all times I/p fuse block (behind left side of dash) Instrument panel cluster (ipc) Interior lights system Lamp rly ctrl Left rear door lock (in left rear passenger's door) Lid ajar sw Lock Lock ctrl Lock sig Logic Message center Nca Open Power distribution system Rear compartment lid latch (in rear compt lid) Rfa/mod fuse 10a Right rear door lock (in right rear passenger's door) S211 S300 S303 S314 S400 (w/ digital audio system) S406 S500 S501 S604 S605 Scrty ind ctrl Security indicator Sw sig Tan Theft led (top center of dash) Trunk ajar Trunk ajar indicator Unlock Unlock ctrl Unlock sig Volt (+) Pass-Key Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Pass-Key Wiring Diagram for Buick LaCrosse CX 2006: 26 (top of engine) engine control module (ecm) 3.6l 3.8l Body control module (bcm) (behind left side of dash, left of steering column) Class 2 data Class 2 serial data Computer data lines system Dr/lck trunk fuse 15a G202 (left side of dash, at base of steering column) Hot at all times I/p fuse block (behind left side of dash) Ignition key Instrument panel cluster (ipc) Logic Message center Powertrain control module (pcm) Reader/ exciter Reference S214 Security indicator Service theft system Starting disabled due to theft system Theft deterrent exciter module (part of ignition key cylinder) Theft system not programmed Transponder Voltage
BODY CONTROL MODULES
COMPUTER DATA LINES Computer Data Lines Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Computer Data Lines Wiring Diagram for Buick LaCrosse CX 2006: 45 (3.6l) (left side of dash, at base of steering column) g202 3.6l 3.8l A11 Abs/tcs class 2 serial data Adg class 2 serial data B10 Bcm class 2 serial data Body control module (bcm) (behind left side of dash, left of steering column) Class 2 serial data Data link connector (dlc) (under left side of dash) Digital radio receiver (left side of trunk) Ecm class 2 serial data Electronic brake control module (ebcm) (left side of engine compt, part of brake pressure modulator valve) Engine control module (ecm) (top of engine) G200 (center of dash cross beam, behind radio) Hot at all times Hvac class 2 serial data Hvac control module (center of dash) I/p fuse block (behind left side of dash) If equipped Inflatable restraint sensing & diagnostic module (sdm) (under right front seat) Instrument panel cluster (ipc) Ipc class 2 serial data Manual a/c automatic a/c Onstar/ aldl fuse 10a Pcm class 2 serial data Power distribution system Powertrain control module (pcm) Radio Radio class 2 serial data S211 S213 Sae j1939 serial data bus + Sae j1939 serial data bus - Sdm class 2 serial data Splice pack sp205 (right side of dash) Tan Throttle actuator control (tac) module Transmission control module (tcm) (3.6l) Uart serial data primary Uart serial data secondary Vehicle communication interface module (vcim) (behind center of dash) W/ onstar
COOLING FAN
3.6L VIN 7 3.6L VIN 7, Cooling Fan Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.6L VIN 7, Cooling Fan Wiring Diagram for Buick LaCrosse CX 2006: 34 (in back of right headlamp, on frame) g100 A18 A19 C18 C19 Class 2 serial Computer data lines system E10 Ect sens sig Engine control module (ecm) (top of engine) Engine coolant temperature (ect) sensor (left side of engine block, above exhaust manifold) Fan 1 fuse 29 30a Fan 1 relay Fan 2 fuse 32 30a Fan 2 relay Fan 3 relay Hi spd fan rly Hot at all times K14 K15 K18 K19 L14 Left cooling fan motor (on left side of radiator) Lo spd fan rly Low ref M14 M15 M18 M19 Right cooling fan motor (on right side of radiator) S119 (in on-engine wiring harness, approximately 34.5 cm from engine control module) Tan Underhood fuse block (mounted to right strut tower)
3.8L VIN 2 3.8L VIN 2, Cooling Fan Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Cooling Fan Wiring Diagram for Buick LaCrosse CX 2006: 32 (in back of right headlamp, on frame) g100 A18 A19 C18 C19 Class 2 serial Computer data lines system E10 Ect sens sig Engine coolant temperature (ect) sensor (on top right of intake manifold) Fan 1 fuse 29 30a Fan 1 relay Fan 2 fuse 32 30a Fan 2 relay Fan 3 relay Hi spd fan rly Hot at all times K14 K15 K18 K19 L14 Left cooling fan motor (on left side of radiator) Lo spd fan rly Low ref M14 M15 M18 M19 Powertrain control module (pcm) (left side of engine compartment, inside air cleaner assembly) Right cooling fan motor (on right side of radiator) Underhood fuse block (mounted to right strut tower)
CRUISE CONTROL
3.6L VIN 7 3.6L VIN 7, Cruise Control Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.6L VIN 7, Cruise Control Wiring Diagram for Buick LaCrosse CX 2006: 48 (in steering column) inflatable restraint steering wheel module coil 10 volt ref 5 volt reference 1 5 volt reference 2 5v ref Accelerator pedal position (app) sensor (under left side of dash) App sensor 1 signal App sensor 2 signal Bcm class 2 data Body control module (bcm) (behind left side of dash, left of steering column) Brake pedal position sensor (under left side of dash) C2 a2 C2 e3 C275 C277 Computer data lines system Cruise control switch Cruise fuse 2a Cruise on ind D pnk E12 c1 Engine control module (ecm) (top of engine) F3 c1 G201 (below dash, bolted to dash carrier) Gmlan serial bus+ Gmlan serial bus- Hot in run or start I/p fuse block (behind left side of dash) Interior lights system Low ref Low reference Pnk S215 Set/coast resume/ accelerate signal Stop lamp sig Stop switch sig Tac mtr ctrl 1 Tac mtr ctrl 2 Tan Throttle actuator control (tac) module (at throttle body) Tp sens 1 sig Tp sens 2 sig Transmission control module (tcm) Underhood fuse block (mounted to right strut tower) Vehicle speed sensor (oss) (on transmission output shaft) Voice recorder/cruise switch assembly Vss high sig Vss low sig
3.8L VIN 2 3.8L VIN 2, Cruise Control Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Cruise Control Wiring Diagram for Buick LaCrosse CX 2006: 40 (in steering column) inflatable restraint steering wheel module coil 10 volt ref 5 volt ref Accelerator pedal position (app) sensor (under left side of dash) App sens 1 sig App sens 2 sig Body control module (bcm) (behind left side of dash, left of steering column) Brake pedal position sensor (under left side of dash) C2 a2 C2 e3 C275 C277 Cruise control switch Cruise fuse 2a Cruise on ind D pnk E12 c1 F3 c1 G201 (below dash, bolted to dash carrier) Hot in run or start I/p fuse block (behind left side of dash) Interior lights system Low ref Pnk Powertrain control module S215 Set/coast resume/ accelerate signal Stop lamp sig Stop lamp sw sig Stop switch sig Tan Throttle actuator control (tac) module Uart serial data 1 Uart serial data 1 c2 Uart serial data 2 Underhood fuse block (mounted to right strut tower) Vehicle speed sensor (vss) (on transmission output shaft) Voice recorder/cruise switch assembly Vss high signal Vss low signal
DEFOGGERS Defoggers Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Defoggers Wiring Diagram for Buick LaCrosse CX 2006: 30 (in passenger's door) passenger outside rearview mirror (in right door sill, forward of right front seat) g302 (inside left door sill, forward of left front seat) g301 (on driver's door) driver outside rearview mirror (on rear window) Automatic a/c Batt main 3 fuse 28 40a Bcm class 2 serial data c1 Body control module (bcm) (behind left side of dash, left of steering column) Compass sens rtn Defogger on ind Electronic compass module (top right side of rear package shelf) F11 Hot at all times Htd/ mir fuse 10a Hvac class 2 serial data Hvac control module (center of dash) Instrument panel cluster (ipc) Instrument panel fuse block (behind left side of dash) Logic Manual a/c Rear defog relay ctrl Rear defog relay ctrl c2 Rear defogger switch Rear window defogger grid Red Rr defog relay Sp205 (right side of dash) Underhood fuse block (mounted to right strut tower) W/ driver info center display
ELECTRONIC POWER STEERING Electronic Power Steering Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Electronic Power Steering Wiring Diagram for Buick LaCrosse CX 2006: 19 A9 c1 Abs fuse 23 10a Abs mtr fuse 31 40a Abs sol fuse 19 25a Battery C4 c2 C5 c1 Electronic brake control module (ebcm) (left side of engine compt, part of brake pressure modulator valve) G115 (3.6l: mounted to bank 1 cylinder head above exhaust manifold) (3.8l: on transmission stud, to right of starter) Ground Hot at all times Hot w/ ign 1 relay energized Ign 1 Magnasteer actuator (w/ magnetic speed variable assist steering power) (left rear of engine compt, behind transaxle) Pnk Red Underhood fuse block (mounted to right strut tower) Var effort steer act cntrl Var effort steer act pwr
ENGINE PERFORMANCE
3.6L VIN 7 3.6L VIN 7, Engine Performance Wiring Diagram (1 of 4) for Buick LaCrosse CX 2006 List of elements for 3.6L VIN 7, Engine Performance Wiring Diagram (1 of 4) for Buick LaCrosse CX 2006: 56 (1,3: left top of engine) (2,5,6: right top of engine) (4: right rear of engine) (bottom of oil pan) engine oil level/temperature sensor (eng harn, approximately 39.5 cm from ecm) s120 (left front of engine block) engine oil pressure sensor +5v +5v ref +5v ref 2 Bare Ckp sens sig Cmp sig Cmp sol ctrl Crankshaft position sensor (right rear of engine block) Drain Ect sig Engine control module (top of engine) Evap sol ctrl Fuel injectors G103 (even bank cylinder head) Gen fdc sig Gen to sig Heated oxygen sensor 1 (at rear of cylinder head in exhaust manifold) Heated oxygen sensor 2 (in exhaust, rear of catalytic converter) Ho2s hi sig Ho2s lo ctrl Ho2s pmp ct Ic 1 sig Ic 2 ctrl Ic 3 ctrl Ic 4 sig Ic 5 ctrl Ic 6 ctrl Inj 1 ctrl Inj 2 ctrl Inj 3 ctrl Inj 4 ctrl Inj 5 ctrl Inj 6 ctrl Knock sensor bank 1 (right side of engine) Knock sensor bank 2 (left side of engine block, below exhaust manifold) Ks 1 sig Ks 2 sig Low ref Map sig Nca Oil lev sig Oil pres sig Oil tmp sig Pnk Pnk e S104 S108 Starting/ charging system Tac mtr ctrl Tan Tp sig Tp2 sig 3.6L VIN 7, Engine Performance Wiring Diagram (2 of 4) for Buick LaCrosse CX 2006 List of elements for 3.6L VIN 7, Engine Performance Wiring Diagram (2 of 4) for Buick LaCrosse CX 2006: 44 (near ignition coils 2,4 & 6) (on left valve cover) (on right valve cover) A11 C11 Cnstr fuse 10a D11 Elek ign fuse 15a Emis- sion fuse 10a Etc fuse 17 15a F12 Fuel inj fuse 15a Fuel pp fuse 22 15a Fuel pump relay G115 (mounted to bank 1 cylinder head above exhaust manifold) G130 (near ignition coils 1,3 & 5) G131 Hot at all times Hot in run or start I/p fuse block (behind left side of dash) Ign 1 relay Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Nca O2 ssr fuse 15a P/train relay Pcm fuse 15 10a Pcm/etc fuse 16 15a Pnk S103 S106 S110 S116 S130 S131 S132 S133 Spark plug Tan Under- hood fuse block (mounted to right strut tower) 3.6L VIN 7, Engine Performance Wiring Diagram (3 of 4) for Buick LaCrosse CX 2006 List of elements for 3.6L VIN 7, Engine Performance Wiring Diagram (3 of 4) for Buick LaCrosse CX 2006: 25 (approximately 34.5 cm from ecm) (approximately 9 cm from cmp sensor 1 intake) s121 (on front of left cylinder head) (on front of right cylinder head) +5v A/c refrigerant pressure sensor (on left side of engine compt, on accumulator) Bank 2) Camshaft position actuator solenoid (exhaust bank 1) Camshaft position actuator solenoid (exhaust bank 2) Camshaft position actuator solenoid (intake bank 1) Camshaft position actuator solenoid (intake bank 2) Camshaft position sensor (exhaust bank 1) Camshaft position sensor (exhaust bank 2) Camshaft position sensor (intake Camshaft position sensor (intake bank 1) Engine coolant temperature sensor (left side of engine block, above exhaust manifold) Evaporative emission (evap) canister purge solenoid valve (top center of engine) Low ref Manifold absolute pressure sensor Mass air flow/ intake air temperature sensor (in air intake tube) Pnk S119 Signal Tan Throttle actuator control module (at throttle body) 3.6L VIN 7, Engine Performance Wiring Diagram (4 of 4) for Buick LaCrosse CX 2006 List of elements for 3.6L VIN 7, Engine Performance Wiring Diagram (4 of 4) for Buick LaCrosse CX 2006: 85 (approximately 32 cm from underhood fuse block towards transmission control module) (in fuel tank) fuel pump & sender assembly (in fuel tank) fuel tank pressure sensor (mounted to bank 1 cylinder head above exhaust manifold) g115 (mounted to c1 right strut tower) (mounted to right strut c1 tower) +5v ref +5v ref 1 +5v ref 2 A/c ref pres A12 Acc Accelerator pedal Air conditioning system Anti-lock brake system App sens 2 sig App sens sig Automatic transmission B12 Battery + Body control module (behind left side of dash, left of steering column) C12 Cc sw sig Class 2 data Clu rly ctrl Computer data lines system Cooling fans system Cruise control system D10 D12 Delv torque sig E11 Eng spd sig Engine control module (top of engine) Evap sol ctrl Evaporative emissions (evap) canister vent solenoid valve (behind left side of rear fascia splash shield, behind wheelwell) Fan rly ctrl Fuel lev sig Fuel level sensor G302 (in right door sill, forward of right front seat) Gmlan bus+ Gmlan bus- Ho2s hi sig Ho2s lo ctrl Ho2s lo sig Hot at all times I/p fuse block (behind left c1 side of dash) I/p fuse block (behind left side of dash) Iat sig Ign 1 volt Ign 3 volt Ignition switch Instrument panel cluster Lan bus + Lan bus - Lock Logic Low ref Maf sig Main rly ctrl Malfunction indicator lamp Mil ctrl Mode switch Navigation system P/n sig Pnk Position sensor (under left side of dash) Req torq sig Rly coil ctrl Rly ctrl Run S116 S118 Start Starting/ charging system Stop lamp sw sig Stop lp sw Tan Tank pres sig Transmission control module Transmission internal Underhood fuse block Underhood fuse block (mounted to right strut tower) Underhood fuse block c1 (mounted to right strut tower) Vss
3.8L VIN 2 3.8L VIN 2, Engine Performance Wiring Diagram (1 of 5) for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (1 of 5) for Buick LaCrosse CX 2006: 54 (in engine oil pan) engine oil level switch (lower left front of engine, on transmission stud, near starter) g113 (on top of engine, approximately 8 cm from breakout to fuel injector 3, towards fuel injector 5) (pins 62-72 not used) (top right rear of engine, near throttle body) exhaust gas recirculation valve 5 volt ref 1 5 volt ref 2 Air sol ctrl Cmp sensor Ect sensor sig Egr pos 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) Fuel inj 1 Fuel inj 2 Fuel inj 3 Fuel inj 4 Fuel inj 5 Fuel inj 6 Fuel injectors (1,3,5: left top of engine) (2,6: right top of engine) (4: right rear of engine) G113 (on transmission stud, near starter) Gen field Gen on sig Generator Ground Heated oxygen sensor (ho2s) 1 (right side of engine) Ho2s heater 1 Ho2s sig high Ho2s sig low Ic timing ctrl Ic timing sig Knock sensor bank 1 Knock sensor bank 2 (right side of engine, below exhaust manifold) Knock sensor 1 Knock sensor 2 Low eng speed Low ref Manifold absolute pressure sensor Map sensor sig Med eng speed Nca Oil level sw Oil press sig Pnk Powertrain control module Red S101 S109 Tan Uart data 3.8L VIN 2, Engine Performance Wiring Diagram (2 of 5) for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (2 of 5) for Buick LaCrosse CX 2006: 40 (front of engine) camshaft position sensor (in right side of engine, on ignition control module bracket) (lower left front of engine) crankshaft position sensor (on top of engine near ignition control module, approximately 12 cm from inline connector c110 breakout, towards icm) (on top of engine near ignition control module, approximately 5.5 cm from inline connector c110 breakout, towards icm) 5 volt ref A11 Aap sensor 1 Accelerator pedal position switch (under left side of dash) App sensor 2 Body control module (behind left side of dash, left of steering column) C11 Elek ign fuse 24 15a Etc fuse 17 15a From p/train relay (diagram 4 of 5) Fuel inj fuse 20 15a G112 G113 (lower left front of engine, on transmission stud, near starter) Ground Hot in run or start Ign 1 volt Ignition control module (icm) (top left front of engine) Low ref Pnk Primary uart S101 S102 S144 S145 Sec uart Secondary air injection control solenoid valve/pressure sensor bank 2 (sulev) (on right side of engine, above valve cover) Secondary air injection solenoid relay (sulev) Spark plugs Stop lamp Stop lamp switch signal Tan Throttle actuator control module Trans sol fuse 21 10a Underhood fuse block (mounted to right strut tower) Vehicle spd 3.8L VIN 2, Engine Performance Wiring Diagram (3 of 5) for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (3 of 5) for Buick LaCrosse CX 2006: 36 1-2 shift solenoid 2-3 shift solenoid A red A/t fluid temp sensor Air pres sens At iss sig Automatic transaxle B tan Boost sol G113 (lower left front of engine, on transmission stud, near starter) Ho2s heater 2 Ho2s sig high Ho2s sig low Iat sensor sig Input shaft speed sensor Low ref Maf sensor sig Pc sol Pnk Powertrain control module Pressure control solenoid Red Shift sol Tan 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 Trans- mission internal mode switch Vehicle speed sensor (on transmission output shaft) Vss sig 3.8L VIN 2, Engine Performance Wiring Diagram (4 of 5) for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (4 of 5) for Buick LaCrosse CX 2006: 31 (at rear of engine, in air cleaner duct) intake air temperature/ mass air flow sensor (w/o stabilitrak) Air pump fuse 25 50a Cnstr fuse 10a D11 Electronic brake control module (left side of engine compt, part of brake pressure modulator valve) Emission fuse 12 10a Evaporative emissions (evap) canister vent solenoid valve (behind left side of rear fascia splash shield, behind wheelwell) F12 Fuel pp fuse 22 15a Fuel pp relay G113 (lower left front of engine, on transmission stud, near starter) G115 (on transmission stud, right of starter) Heated oxygen sensor (ho2s) 2 Hot at all times I/p fuse block (behind left side of dash) Iat Maf Nca O2 ssr fuse 14 15a P/train relay Pnk Red S101 S114 S117 Secondary air injection pump (sulev) (left rear of engine) Secondary air injection pump relay (sulev) Tan To p/train fuses (diagram 2 of 5) Underhood fuse block (mounted to right strut tower) 3.8L VIN 2, Engine Performance Wiring Diagram (5 of 5) for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Engine Performance Wiring Diagram (5 of 5) for Buick LaCrosse CX 2006: 64 (in right door sill, forward of right front seat) g302 (left side of dash, at base of steering column) (on left side of engine compt, on accumulator) a/c refrigerant pressure sensor (right side of dash) 5 volt ref 1 A/c clutch relay A/c press sig A12 A7 c2 Acc Air conditioning system B12 Battery C1 d8 C12 Class 2 data Clstr fuse 10a Cooling fans system Cruise control system Cruise sig D1 c1 D10 D12 c2 Data link connector (under left side of dash) E11 Eng speed sig Evap vent sol F c405 F11 Fuel level sig Fuel pump & sender assembly Fuel pump relay Fuel tank Fuel tank press Fuel tank pressure sensor G202 High fan Hot at all times Hot in run or start I/p fuse block (behind left side of dash) Ignition 1 Ignition 3 Ignition switch Instrument panel cluster Lock Low fan Low ref Malfunction indicator lamp (mil) Mil control Pcm fuse 15 10a Pcm relay Pcm/etc fuse 16 15a Pnk Powertrain control module Relay ctrl Run S211 Splice pack sp205 Start Starter enable Starting/charging system Stop lamp sw Underhood fuse block (mounted to right strut tower) Vehicle speed sig
EXTERIOR LIGHTS Exterior Lamps Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Exterior Lamps Wiring Diagram for Buick LaCrosse CX 2006: 82 (behind left side of rear bumper, in object sensor & license lamp harness) s402 (in body wiring harness, inside right side of rear compt, approximately 78.5 cm from breakout to inline connector c405, towards inline connector c402) s407 (mounted to right strut tower) underhood fuse block 10 volt ref Anti-lock brakes or engine controls system Anti-lock brakes, engine controls or transmissions systems Auto Bcm class 2 Bcm class 2 serial data Body control module (bcm) (behind left side of dash, left of steering column) Brake pedal position sensor (under left side of dash) C1 c2 C1 e2 C2 e11 C2 f9 C3 a9 Center high mounted stop lamp (chmsl) Chmsl/ bkup fuse 15a Computer data lines system Driver information center G100 (in back of right headlamp. on frame) G101 (left side of front end upper tie bar, in back of headlamp) G202 (left side of dash, at base of steering column) G301 (inside left door sill, forward of left front seat) G302 (in right door sill, forward of right front seat) Hazard Hazard sw sig Hazrd fuse 20a Head Hot at all times I/p fuse block (behind left side of dash) Instrument panel cluster (ipc) Ipc class 2 serial data Lamp switch assembly Left Left front marker lamp Left front park/ turn signal lamp Left license lamp Left rear marker lamp Left tail/ stop & turn signal lamp Left turn indicator Left turn sw sig Logic Low ref Lower left tail lamp Lower right tail lamp Lr stop/turn volt Off Park Park lamp on sig Park lmp rly ctrl Prk lamp fuse 10a Prk lamp relay Right Right front marker lamp Right front park/ turn signal lamp Right license lamp Right rear marker lamp Right tail/ stop & turn signal lamp Right turn indicator Right turn sw sig Rr stop/turn volt S111 S112 S113 S124 S211 S214 S401 S406 S900 S901 S902 S903 Stop lamp sw sig Tan Turn audible indicator Turn signal/ multifunction switch Upper left tail lamp Upper right tail lamp Volt Volt (+)
3.6L VIN 7 3.6L VIN 7, Backup Lamps Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.6L VIN 7, Backup Lamps Wiring Diagram for Buick LaCrosse CX 2006: 23 (mounted to bank 1 cylinder head above exhaust manifold) g115 Automatic transmission Backup lamp sply volt Battery volt (+) Body control module (bcm) (behind left side of dash, left of steering column) Chmsl/ bkup fuse 15a Computer data lines system G301 (inside left door sill, forward of left front seat) G302 (in right door sill, forward of right front seat) Gmlan ser data Hot at all times I/p fuse block (behind left side of dash) Left backup lamp Navigation system Pcm class 2 serial data Right backup lamp S116 S900 S901 Tr sw a Tr sw b Transmission control module (tcm) Transmission internal mode switch (ims)
3.8L VIN 2 3.8L VIN 2, Backup Lamps Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Backup Lamps Wiring Diagram for Buick LaCrosse CX 2006: 22 (lower left front of engine, on transmission stud, near starter) g113 Automatic transmission Backup lamp sply volt Battery volt (+) Body control module (bcm) (behind left side of dash, left of steering column) Chmsl/ bkup fuse 15a Computer data lines system G301 (inside left door sill, forward of left front seat) G302 (in right door sill, forward of right front seat) Hot at all times I/p fuse block (behind left side of dash) Left backup lamp Navigation system Pcm class 2 serial data Powertrain control module (pcm) Right backup lamp S101 S900 S901 Tr sw a Tr sw b Transmission internal mode switch (ims)
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 3) for Buick LaCrosse CX 2006 List of elements for Ground Distribution Wiring Diagram (1 of 3) for Buick LaCrosse CX 2006: 63 (3.6l) engine control module (ecm) (mounted to right strut tower) underhood fuse block (sulev) secondary air injection (air) control solenoid valve/ pressure sensor bank 2 3.6l 3.8l A/c clu diode A/c clutch diode A/c compressor clutch Approximately 20 cm from g115) Automatic transmission B b B11 Battery Body control module (bcm) C100 Electronic brake control module (ebcm) Engine oil level switch Engine oil pressure (eop) switch Except sulev Fan 2 relay 46 Frame rail, behind bumper) Fuel pp relay 41 G100 (in back of right headlamp on frame) G101 (left side of front end upper tie bar, in back of headlamp) G102 (3.6l: below right front strut tower) (3.8l: near battery) G103 (redundant ground from ecm to even bank cylinder head) G111 (3.6l: lower left front of engine, on transmission stud, near starter) (3.8l: lower left side of engine) G113 (lower left front of engine, on transmission stud, near starter) G115 (mounted to bank 1 cylinder head above exhaust manifold) G115 (on transmission stud, to right of starter) Hdm beam module 35 Hood ajar switch Horn assembly Ign 1 relay 37 K14 Left front fog lamp Left front marker lamp Left front park/ turn signal lamp Left high beam headlamp Left low beam headlamp Mass air flow (maf)/ intake air temperature (iat) sensor Powertrain control module (pcm) Right cooling fan Right front fog lamp Right front marker lamp Right front park/ turn signal lamp Right high beam headlamp Right low beam headlamp S101 (in engine wiring harness, in left front of engine compt, approximately 5 cm from breakout to pcm, towards g113) S102 (in engine wiring harness. top of engine, approximately 5 cm from breakout to throttle actuator control (tac) module, towards pcm) S111 S113 S116 S124 (forward lamp wiring harness, behind right headlamp, approximately 5 cm from breakout to c142, towards horn assembly) S127 (in left headlamp wiring harness) Secondary air injection (air) pump (sulev) Sulev Throttle actuator control (tac) module Transmission control module (tcm) Transmission internal mode switch (ims) Windshield washer fluid level switch Windshield washer fluid pump Wiring harness) Ground Distribution Wiring Diagram (2 of 3) for Buick LaCrosse CX 2006 List of elements for Ground Distribution Wiring Diagram (2 of 3) for Buick LaCrosse CX 2006: 74 (3.8l) ignition control module (icm) (in on-engine wiring harness) (top rear of left cylinder head) (w/ lumbar seats) driver seat lumbar switch 3.6l A c2 A/t shift lock control solenoid B c2 Body control module (bcm) C275 C277 Cruise control switch Cylinder head) Driver back heated seat element Driver door lock Driver door lock switch Driver heated seat relay Driver outside rearview mirror motor Driver seat adjuster switch Driver seat belt switch Driver window switch Electronic compass module G112 (in right side of engine, on ignition control module bracket) G130 (near ignition coils 1, 3, & 5) G131 (near ignition coils 2, 4, & 6) G201 (below dash, bolted to dash carrier) G301 (inside left door sill, forward of left front seat) Horn switch Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Inflatable restraint steering wheel module Inflatable restraint steering wheel module coil Left backup lamp Left license lamp Left rear door lock Left rear marker lamp Left steering wheel controls Left tail/stop & turn signal lamp Logic Lower left tail lamp Nca Outside rearview mirror switch Passenger back heated seat element Passenger heat seat relay Passenger seat adjuster switch Passenger seat belt switch Prndl lamp Rear object sensor control module Rear window defogger grid Right license lamp Right steering wheel controls S130 S131 S215 (in steering column wiring harness, approximately 4.5 cm from breakout to windshield wiper/washer switch, towards inline connector c201) S330 (in driver seat wiring harness, below driver seat, approximately 4.5 cm from breakout to seat belt switch, towards seat adjuster switch - driver) S333 (in front passenger seat wiring harness below front passenger seat, approximately 7 cm from breakout to seat belt pretensioner - rf, towards heated seat relay - front passenger) S401 (behind left side of rear bumper, in object sensor & license lamp harness) S500 (in driver's door, above door speaker) S900 Steering wheel To g301, towards inline connector c355) Upper left tail lamp Voice recorder/ cruise assembly switch W/ accessory steering wheel control W/ console shift W/ heated seats W/ park assist W/ power seats W/o power seats Wiring harness) Ground Distribution Wiring Diagram (3 of 3) for Buick LaCrosse CX 2006 List of elements for Ground Distribution Wiring Diagram (3 of 3) for Buick LaCrosse CX 2006: 90 (automatic a/c) inside air temperature sensor (digital audio system s-band) digital radio receiver (gps vehicle communication system) inside rearview mirror (in dash harness, at center of dash) (in right front door wiring harness, approximately 25.5 cm from breakout to inline connector c304, towards window motor - front passenger) (mounted to right strut tower) underhood fuse block A/t shift lock control solenoid A12 c1 A15 A6 c1 Ambient light sensor Audio amplifier Automatic a/c Auxiliary power outlet B8 c1 Blower motor control processor Body control module (bcm) Brake fluid level switch C1 b5 Center high mounted stop lamp (chmsl) Cigar lighter Column shift Console shift Custom 9 speaker system D c1 Data link connector (dlc) Driver information center (dic) E15 F c1 F14 F7 c2 Front passenger door lock Front passenger door lock switch Front passenger window switch Fuel pump & sender assembly G c2 G200 (center of dash cross beam, behind radio) G202 (left side of dash, at base of steering column) G302 (in right door sill, forward of right front seat) Garage door opener Gps vehicle communication system Hvac control module I/p compartment lamp switch I/p fuse block (behind left side of dash) If equipped Ignition lock cylinder control actuator Ignition switch Inflatable restraint front passenger presence system (pps) module Inflatable restraint passenger air bag on/off indicator Inflatable restraint sensing & diagnostic module (sdm) Instrument panel cluster (ipc) Lamp switch assembly Left dome/ reading lamp Left i/p courtesy lamp Left vanity mirror lamp Lower right tail lamp Manual a/c Nca Overhead console reading lamps Passenger outside rearview mirror motor Passenger, towards inline connector c304) Radio Rear compartment lid latch Remote control door lock receiver (rcdlr) Right backup lamp Right dome/ reading lamp Right i/p courtesy lamp Right rear door lock Right rear marker lamp Right tail/stop & turn signal lamp Right vanity mirror lamp S211 S213 S214 S300 (in floor wire harness, at right front kick panel) S309 S390 (in roof wiring harness, near center of windshield header approximately 20 cm from courtesy/reading lamp - right breakout, towards inside rearview mirror) S406 (in body wiring harness, below rear window panel, approximately 9 cm from breakout to inline connector c356, towards g302) S604 S901 Sunload sensor assembly Sunroof module Theft deterrent exciter module Theft led Turn signal/ multifunction switch Upper right tail lamp Vehicle communication interface module (vcim) Windshield wiper motor Wiper hi relay 44 Wiper relay 45
HEADLIGHTS Headlights Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Headlights Wiring Diagram for Buick LaCrosse CX 2006: 81 3.6l 3.8l A10 A11 A12 Ambient light sensor (top of dash) Auto Auto a/c B(+) B11 B12 B3 c1 Bcm Bcm class 2 serial Body control module (bcm) (behind left side of dash, left of steering column) C10 C12 Clstr fuse 10a Computer data lines system Drl ambient light E10 c2 E19 E20 Exterior lamps off Flash to pass sw Fog Fog lamp ind Fog lamp relay ctrl Fog lp relay 36 Fog lps fuse 7 10a Front fog lamp sw Ftp G100 (in back of right headlamp on frame) G101 (left side of front end upper tie bar, in back of headlamp) G113 (lower left front of engine, on transmission stud, near starter) G115 (mounted to bank 1 cylinder head above exhaust manifold) G19 G20 G202 (left side of dash, at base of steering column) Gnd Hdlp suggest ind Hdm beam module 35 Head Headlamp dimmer sw Headlamp mod ctrl Headlamp on sig Hi beam relay Hi beam rly ctrl High High beam ind Hot at all times I/p fuse block (behind left side of dash) Instrument panel cluster (ipc) Lamp switch assembly Left front fog lamp Left high beam headlamp Left low beam headlamp Lf hi beam fuse 1 10a Lf lo beam fuse 3 10a Logic Low Manual a/c Off Park Rf hi beam fuse 2 10a Rf lo beam fuse 4 10a Right front fog lamp Right high beam headlamp Right low beam headlamp S101 S111 S113 S116 S126 S127 S211 S214 Serial data Sunload sensor assembly (top center of dash) Turn signal/ multifunction switch Underhood fuse block (mounted to right strut tower)
HORN Horn Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Horn Wiring Diagram for Buick LaCrosse CX 2006: 18 (below dash, bolted to dash carrier) g201 A2 c3 Body control module (bcm) (behind left side of dash, left of steering column) C275 c C277 c G100 (in back of right headlamp on frame) Horn assembly (right front of vehicle) Horn fuse 11 15a Horn relay Horn rly ctrl Horn switch Hot at all times Inflatable restraint steering wheel module (in steering wheel assembly) Inflatable restraint steering wheel module coil (in steering column) Nca S124 S215 Underhood fuse block (mounted to right strut tower)
INSTRUMENT CLUSTER Instrument Cluster Wiring Diagram, with Tachometer (1 of 2) for Buick LaCrosse CX 2006 List of elements for Instrument Cluster Wiring Diagram, with Tachometer (1 of 2) for Buick LaCrosse CX 2006: 91 (left side of dash, at base of steering column) g202 Abs indicator Abs/tcs class 2 serial data Air bag indicator Air temp sens sig Ambient air temperature sensor (near center front of radiator) B+ bcm class 2 serial data B+ pcm/ecm class 2 serial data B10 Bat pos voltage Bcm class 2 serial data Brake fluid level switch (in brake fluid reservoir) Brake indicator Brake warning ind ctrl C2 a9 Change oil indicator Charge indicator Check tire pressure indicator Clstr fuse 10a Compass sens feed Compass sens ret Computer data lines system Cruise indicator D11 Defogger system Dic fuel signal Dic gage signal Dic menu sw sig Dic odo sig Dic set/reset sw sig Display fuse 18 10a Door ajar indicator E8 c1 Electronic compass module (top right side of rear package shelf) Engine controls system Engine coolant temperature gage Engine oil level switch (in engine oil pan) Engine oil pressure (eop) switch (below power steering pump) Fog lamp indicator Fuel gage G113 (lower left front of engine, on transmission stud, near starter) G202 (left side of dash, at base of steering column) G301 (inside left door sill, forward of left front seat) Gnd High beam indicator Hot at all times Hot coolant indicator Hot in run or start I/p fuse block (behind left side of dash) Ign 1 voltage Instrument panel cluster (ipc) Interior lights system Ipc class 2 serial data Ipc/bcm class 2 serial data Km 000000 trip Km/h indicator Lcd display Left turn indicator Logic Low coolant level indicator Low fuel indicator Low oil level indicator Low oil pressure indicator Low ref Malfunction indicator lamp (mil) Message center Mil ctrl Mph indicator P r n d 3 2 1 Pass seat belt ind Pcm class 2 serial data Pcm/ecm class 2 serial data Pnk Power distribution system Rear defog rly ctrl Red Right turn indicator S211 S303 Sdm class 2 serial data Seat belt indicator Security indicator Service vehicle soon indicator Speedometer Tachometer Tan Traction control off indicator Trunk ajar indicator Turn audible indicator Underhood fuse block (mounted to right strut tower) W/ park assist Instrument Cluster Wiring Diagram, with Tachometer (2 of 2) for Buick LaCrosse CX 2006 List of elements for Instrument Cluster Wiring Diagram, with Tachometer (2 of 2) for Buick LaCrosse CX 2006: 62 (behind left side of dash) i/p fuse block (in driver's door) driver door lock (in front passenger's door) front passenger door lock (in fuel tank) fuel pump & sender assembly (in left rear passenger's door) left rear door lock (in on-engine wiring harness, approximately 39.5 cm from engine control module) (in right rear passenger's door) right rear door lock (mounted to right strut tower) underhood fuse block 3.6l 3.8l 5v ref 1 A12 Anti-lock brakes system B12 Bcm class 2 serial data c1 Body control module (bcm) (behind left side of dash, left of steering column) C2 3.6l Computer data lines system Door lock ajar indicator switch Driver information center (dic) E/m (base) set/reset (uplevel) Engine control module (ecm) (top of engine) Engine controls system Engine oil level/ temperature sensor (bottom of oil pan) Engine oil pressure (eop) sensor (left front of engine block) Exterior lights system Fuel Fuel level sensor Fuel lvel sig G202 (left side of dash, at base of steering column) G301 (inside left door sill, forward of left front seat) G302 (in right door sill, forward of right front seat) Gages Hazard Info Interior lights system Lf dr ajar sw sig c2 Logic Low ref Lr dr ajar sw sig Oil lvl sw sig Oil pres sw Oil press sw Park brake sw sig Park brake switch (on park brake assembly) Pnk Powertrain control module (pcm) (left side of eng compt inside air cleaner assy) Red Rf dr ajar sw sig Rr dr ajar sw sig S119 (in on-engine wiring harness, approximately 34.5 cm from engine control module) S120 S211 S303 S406 S500 S604 Serial data Tan Traction control Trip odo Uplevel Instrument Cluster Wiring Diagram, without Tachometer (1 of 2) for Buick LaCrosse CX 2006 List of elements for Instrument Cluster Wiring Diagram, without Tachometer (1 of 2) for Buick LaCrosse CX 2006: 61 (left side of dash, at base of steering column) g202 Abs indicator Abs/tcs class 2 serial data Air bag indicator B+ pcm/ecm class 2 serial data Bat pos voltage Bcm class 2 serial data Brake fluid level switch (in brake fluid reservoir) Brake indicator Brake warning ind ctrl Charge indicator Check tire pressure indicator Clstr fuse 10a Computer data lines system Cruise indicator Door ajar indicator E8 c1 Engine controls system Engine coolant temperature gage Fuel gage G202 (left side of dash, at base of steering column) Gas cap indicator Gnd Hdlp suggest indicator High beam indicator Hot at all times Hot coolant indicator I/p fuse block (behind left side of dash) Instrument panel cluster (ipc) Interior lights system Ipc class 2 serial data Ipc/bcm class 2 serial data Km 000000 trip Km/h indicator Lcd display Left turn indicator Logic Low fuel indicator Low oil pressure indicator Low ref Low wash indicator Malfunction indicator lamp (mil) Mil ctrl Mph indicator P r n d 3 2 1 Park brake switch (on park brake assembly) Pass seat belt ind Pcm class 2 serial data Pcm/ecm class 2 serial data Reduced eng pwr indicator Right turn indicator S211 Sdm class 2 serial data Seat belt indicator Security indicator Service vehicle soon indicator Speedometer Tachometer Traction control off indicator Trunk ajar indicator Turn audible indicator Instrument Cluster Wiring Diagram, without Tachometer (2 of 2) for Buick LaCrosse CX 2006 List of elements for Instrument Cluster Wiring Diagram, without Tachometer (2 of 2) for Buick LaCrosse CX 2006: 47 (in on-engine wiring harness, approximately 39.5 cm from engine control module) 3.6l 3.8l 5v ref 1 A12 B12 Bcm class 2 serial data Body control module (bcm) (behind left side of dash, left of steering column) Computer data lines system Door lock ajar indicator switch Driver door lock (in driver's door) Engine control module (ecm) (top of engine) Engine controls system Engine oil level switch (in engine oil pan) Engine oil level/oil temperature sensor (bottom of oil pan) Engine oil pressure (eop) sensor (left front of engine block) Engine oil pressure (eop) switch (below power steering pump) Front passenger door lock (in front passenger's door) Fuel level sensor Fuel lvel sig Fuel pump & sender assembly (in fuel tank) G113 (lower left front of engine, on transmission stud, near starter) G301 (inside left door sill, forward of left front seat) G302 (in right door sill, forward of right front seat) I/p fuse block (behind left side of dash) Left rear door lock (in left rear passenger's door) Lf dr ajar sw sig Logic Low ref Lr dr ajar sw sig Oil lvl sw sig Oil pres sw Oil press sw Park brake sw sig Powertrain control module (pcm) (left side of engine compt, inside air cleaner assembly) Rf dr ajar sw sig Right rear door lock (in right rear passenger's door) Rr dr ajar sw sig S119 (in on-engine wiring harness, approximately 34.5 cm from engine control module) S120 S303 S406 S500 S604 Serial data Tan Underhood fuse block (mounted to right strut tower)
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Courtesy Lamps Wiring Diagram for Buick LaCrosse CX 2006: 57 (behind left side of dash, left of steering column) body control module (bcm) (in right door sill, forward of right front seat) g302 (in roof wiring harness, near center of windshield header approximately 10 cm from courtesy/reading lamp - right breakout, towards inside rearview mirror) (w/ onstar) s393 (in roof wiring harness, near center of windshield header approximately 7.5 cm from courtesy/reading lamp - right breakout, towards inline connector c390) (inside left door sill, forward of left front seat) g301 (left side of dash, at base of steering column) g202 Battery positive voltage Cour- Courtesy defeat sw Courtesy lamp sw on sig D10 Defeat Dome Driver door lock (in driver's door) Front passenger door lock (in front passenger's door) G200 (center of dash cross beam, behind radio) G302 (in right door sill, forward of right front seat) Garage door opener Hot at all times I/p compartment lamp & switch I/p fuse block (behind left side of dash) Inside rearview mirror lamp Int/illum fuse 10a Lamp switch assembly Left courtesy/ reading lamp Left dome/ reading lamp Left i/p courtesy lamp Left rear door lock (in left rear passenger's door) Left vanity mirror lamp Lf door open sw sig Lr door open sw sig Off Open Overhead console reading lamps Power courtesy lamp Rear compartment courtesy lamp Rear compartment lid latch (in rear compartment lid) Rf door open sw sig Right courtesy/ reading lamp Right dome/ reading lamp Right i/p courtesy lamp Right rear door lock (in right rear passenger's door) Right vanity mirror lamp Rr door open sw sig S211 S213 S303 S308 S309 S390 S398 S406 S500 S604 Tan Tesy lamp W/ sunshade mirror Instrument Illumination Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Instrument Illumination Wiring Diagram for Buick LaCrosse CX 2006: 57 (in i/p wiring harness, left side of dash, approximately 21 cm from lamp assembly switch towards engine compartment pass-thru) (in right door sill, forward of right front seat) g302 Auto Auto a/c Battery current sensor Battery positive voltage Bcm class 2 serial data Body control module (bcm) (behind left side of dash, left of steering column) Computer data lines system Cruise control switch Driver door lock switch Driver information center (dic) Driver window switch F c275 F c277 Front passenger door lock switch Front passenger window switch G200 (center of dash cross beam, behind radio) G201 (below dash, bolted to dash carrier) G202 (left side of dash, at base of steering column) G301 (inside left door sill, forward of left front seat) Ground Head Hot at all times Hvac control module (center of dash) I/p fuse block (behind left side of dash) Illum Inflatable restraint steering wheel module coil Instrument panel cluster (ipc) Int/ illum fuse 10a Ip dimming control Ip dimming return Ip dimming voltage ref Lamp switch assembly Left steering wheel controls (w/ accessory steering wheel control) Manual a/c Off Outside rearview mirror switch Park Park lamp sw on sig Pnk Prndl lamp (console shift) Radio Right steering wheel controls (w/ accessory steering wheel control) S203 (in i/p harness, below center of dash, approximately 4 cm from second breakout from dlc connector, towards brake pedal position sensor) S204 S211 S213 S215 S277 S280 S303 S501 S502 (in driver's door, below window switch assembly) S605 Str/whl/ illum fuse 2a Voice recorder/ cruise switch assembly
NAVIGATION Parking Assistant Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Parking Assistant Wiring Diagram for Buick LaCrosse CX 2006: 52 (inside left door sill, forward of left front seat) g301 A rear parking assist (rpa) diagnostic connector (left side of trunk) Backup lamp sply voltage Body control module (bcm) (behind left side of dash, left of steering column) C1 e10 C2 b11 C2 e3 Center amber ind Center amber ind ctrl D11 Display fuse 18 10a Engine control module (ecm) (3.6l) (top of engine) Engine controls system Exterior lights & mirrors systems F11 Ground Hot w/ ign 1 relay energized I/p fuse block (behind left side of dash) Ign 1 voltage Left amber ind Left amber ind ctrl Left rear corner object sensor (left side of rear bumper) Left rear middle object sensor (middle of bumper) Low reference Lr corner object sens sig Lr middle object sens sig Object sens low ref Object sens sply voltage Pnk Power distribution system Powertrain control module (pcm) (3.8l) Rear object sensor control module Rear parking assist (rpa) display Rear parking assist chime Rear parking assist chime sig Rear parking diagnostic sig Red Red ind Red ind crtl Right rear corner object sensor (right side of rear bumper) Right rear middle object sensor (middle of rear bumper) Rr corner object sens sig Rr middle object sens sig S303 S420 (in trunk, at base of right rear strut tower) S450 (behind right side of rear bumper, on object sensor & license lamp harness) S451 (behind right side of rear bumper, on object sensor & license lamp harness) Sensor signal Telltale assembly sply voltage Underhood fuse block (mounted to right strut tower) Vehicle speed sig Vss sig
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 4) for Buick LaCrosse CX 2006 List of elements for Power Distribution Wiring Diagram (1 of 4) for Buick LaCrosse CX 2006: 93 (in headliner harn, at right front of headliner) s394 (mounted to right strut tower) underhood fuse block 3.6l 3.8l A1 c1 Abs mtr fuse 31 40a Abs sol fuse 19 25a Air pump fuse 25 50a Audio amplifier (w/ 9 speaker system) Automatic a/c B10 Batt main 1 fuse 26 40a Batt main 2 fuse 27 50a Batt main 3 fuse 28 40a Batt main 4 fuse 30 30a Battery Blower motor control processor Body control module (bcm) C1 b1 C1 d12 C10 C2 d9 C2 e2 C2 f9 C4 c2 Canister fuse 10a Chmsl/ bkup fuse 15a Clstr fuse 10a D10 Data link connector (dlc) Digital radio receiver Dr/lck trunk fuse 15a Driver heated seat relay (if equipped) Driver seat adjuster switch Driver seat lumbar switch Driver window switch E c1 E c2 E12 Electronic brake control module (ebcm) (w/ abs) Engine control module (ecm) Evaporative emission (evap) canister vent solenoid F10 Front passenger window switch Generator Hazrd fuse 20a Htd/ seat fuse 20a Hvac control module Hvac fuse 10a I/p fuse block (behind left side of dash) Inflatable restraint front passenger presence system (pps) module Inside rearview mirror Instrument panel cluster (ipc) Int illum fuse 10a Manual a/c Nca Onstar/ aldl fuse 10a Outside rear view mirror switch Park switch Passenger heated seat relay (if equipped) Passenger seat adjuster switch (if equipped) Pcm/ etc fuse 16 15a Power lumbar control seat Powertrain control module (pcm) Prk/ lamp relay Prk/ switch fuse 5a Prk/lamp fuse 10a Pwr wndw circuit breaker 25a Pwr/ mir fuse 10a Pwr/ seat circuit breaker 25a R/ defog relay Radio Rap relay Rdo amp fuse 25a Red Remote control door lock receiver (rcdlr) Rfa/ mod fuse 10a S/roof fuse 20a S331 S395 Secondary air injection (air) pump relay (sulev) Starter Sunroof motor To tcm fuse 8 (diagram 2 of 4) Vehicle communication interface module (vcim) (if equipped) W/ digital audio system W/ driver W/ inside rear view mirror W/ sunroof W/o digital audio system W/o driver W/o sunroof Washer/ rvc fuse 6 15a Power Distribution Wiring Diagram (2 of 4) for Buick LaCrosse CX 2006 List of elements for Power Distribution Wiring Diagram (2 of 4) for Buick LaCrosse CX 2006: 90 (3.6l) s116 (3.8l) s101 (center of dash cross beam, behind radio) g200 (in steering column wiring harness, near ignition switch) s200 (inside transmission housing, red approximately 19 cm from inline connector c113) s115 1-2 shift solenoid valve 12 volt reference 2-3 shift solenoid valve 3.6l 3.8l A/c clutch fuse 13 10a A/c comp relay 38 A10 A11 A2 c1 Abs fuse 23 10a Acc Automatic a/c Automatic transmission Aux pwr fuse 10 25a Auxiliary power outlet Body control module Body control module (bcm) C1 a5 C1 b3 C1 b4 C1 d1 C100 C2 a12 C2 b9 C275 C277 Cigar lighter Crank relay Crank voltage Cruise fuse 2a D11 Display fuse 18 10a E12 Electronic brake control module (w/ abs) Electronic compass module Engine control module (ecm) F12 From ign 1 relay (diagram 2 of 4) From washer/rvc a fuse 6 (diagram 1 of 4) G113 (3.8l) (lower left front of engine, on transmission stud, near starter) G115 (3.6l) (mounted to bank 1 cylinder head, above exhaust manifold) G202 (left side of dash, at base of steering column) G302 (in right door sill, forward of right front seat) Hvac control module I/p fuse block (behind left side of dash) Ign 1 relay 37 Ignition 1 voltage Ignition 3 voltage Ignition switch Inflatable restraint front passenger presence system module Inflatable restraint passenger airbag on/off indicator Inflatable restraint sensing & diagnostic module Inflatable restraint steering wheel module coil Inside air temperature sensor Key in ignition switch Key in ignition switch signal Lock Manual a/c Nca P/train relay 40 Pcm fuse 15 10a Pnk Powertrain control module (pcm) Rear object sensor control module Red Run S213 S214 S406 Sir fuse 9 10a Start Steering angle sensor (w/ abs) Tcm fuse 8 15a To a/c clutch fuse (diagram 2 of 4) To etc fuse 17 (diagram 3 of 4) To fan 2 fuse (diagram 3 of 4) Torque converter clutch (tcc) solenoid valve Trans sol fuse 21 10a Transmission control module (tcm) Transmission control module (tcm) (3.6l) Underhood fuse block (mounted to right strut tower) Voice recorder/ cruise switch assembly W/ park assist Yaw & lateral acceleration sensor (w/ abs) Power Distribution Wiring Diagram (3 of 4) for Buick LaCrosse CX 2006 List of elements for Power Distribution Wiring Diagram (3 of 4) for Buick LaCrosse CX 2006: 46 3.6l 3.8l A12 A18 A19 C10 C11 Crank relay 48 E14 Emission fuse 12 10a Engine control module (ecm) Etc fuse 17 15a Evaporative emission (evap) canister purge solenoid valve Fan 1 fuse 29 30a Fan 1 relay 42 Fan 2 fuse 32 30a Fan 2 relay 46 Fan 3 relay 43 Fog lp relay 36 Fog lps fuse 7 10a From p/train b relay 40 (diagram 2 of 4) From p/train d relay 40 (diagram 2 of 4) Fuel pp fuse 22 15a Fuel pp relay 41 G19 G20 Hdm beam module 35 Heated oxygen sensor (ho2s) 2 Hi beam relay 34 Horn fuse 11 15a Horn relay 39 K15 K18 K19 Mass air flow (maf)/ intake air temperature (iat) sensor Pnk Pnk (on engine wiring harness, at rear of engine) s117 Secondary air injection (air) pump relay Secondary air injection (air) solenoid relay Starter fuse 33 40a Sulev Throttle actuator control (tac) module To elek ign fuse 24 (diagram 4 of 4) Underhood fuse block (mounted to right strut tower) Wiper relay 45 Wiper/ws fuse 5 25a Power Distribution Wiring Diagram (4 of 4) for Buick LaCrosse CX 2006 List of elements for Power Distribution Wiring Diagram (4 of 4) for Buick LaCrosse CX 2006: 37 (engine wiring harness, on top of engine, approximately 8 cm from breakout to fuel injector 3, towards fuel injector 5) s109 (in engine wiring harness approximately 5 cm from ignition coil 1 towards ignition coil 3) s106 (in engine wiring harness, approximately 5.5 cm from breakout to engine control module) s110 (in engine wiring harness, near injector coils) s103 (in fuel injector wiring harness) s104 (in fuel injector wiring harness) s108 02 ssr fuse 14 15a 3.6l 3.8l A11 Camshaft position (cmp) actuator solenoid exhaust bank 1 Camshaft position (cmp) actuator solenoid exhaust bank 2 Camshaft position (cmp) actuator solenoid intake bank 1 Camshaft position (cmp) actuator solenoid intake bank 2 D11 Elek ign fuse 24 15a Evaporative emissions (evap) canister purge solenoid valve From emission e fuse 12 (diagram 3 of 4) Fuel inj fuse 20 15a Fuel injector 1 Fuel injector 2 Fuel injector 3 Fuel injector 4 Fuel injector 5 Fuel injector 6 Heated oxygen sensor (ho2s) 1 Heated oxygen sensor (ho2s) 2 Ignition coil 1 Ignition coil 2 Ignition coil 3 Ignition coil 4 Ignition coil 5 Ignition coil 6 Ignition control module (icm) Nca Pnk Underhood fuse block (mounted to right strut tower)
POWER DOOR LOCKS Power Door Locks Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Power Door Locks Wiring Diagram for Buick LaCrosse CX 2006: 75 (if equipped) rear window antenna grid (in body wiring harness, below right front passenger seat, approximately 26 cm from second breakout to g301, towards inflatable restraint sensing & diagnostic module) s315 (in body wiring harness, below right side of front passenger seat, approximately 29 cm from second breakout to inline connector c311, towards inflatable restraint sensing & diagnostic module) (inside left door sill, forward of left front seat) g301 (on right side of rear package shelf) remote control door lock receiver (rcdlr) A5 c2 Ajar Ajar sw sig Antenna sig Bcm class 2 Body control module (bcm) (behind left side of dash, left of steering column) Class 2 Coax Computer data lines system Door ajar Door ajar indicator Door lock actuator Door lock ajar indicator switch Door lock cylinder switch Door lock open indicator switch Dr ajar sw sig Dr open sw sig Dr/lck trunk fuse 15a Driver door lock (in driver's door) Driver door lock switch Enable sig Front passenger door lock (in front passenger's door) Front passenger door lock switch G202 (left side of dash, at base of steering column) G301 (inside left door sill, forward of left front seat) G302 (in right door sill, forward of right front seat) Ground Headlights system exterior lights system Hi beam relay Horn rly ctrl Horns system Hot at all times I/p fuse block (behind left side of dash) Instrument panel cluster (ipc) Interior lights system Lamp rly ctrl Left rear door lock (in left rear passenger's door) Lid ajar sw Lock Lock ctrl Lock sig Logic Message center Nca Open Power distribution system Rear compartment lid latch (in rear compt lid) Rfa/mod fuse 10a Right rear door lock (in right rear passenger's door) S211 S300 S303 S314 S400 (w/ digital audio system) S406 S500 S501 S604 S605 Scrty ind ctrl Security indicator Sw sig Tan Theft led (top center of dash) Trunk ajar Trunk ajar indicator Unlock Unlock ctrl Unlock sig Volt (+)
POWER MIRRORS Electrochromic Mirror Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Electrochromic Mirror Wiring Diagram for Buick LaCrosse CX 2006: 24 (in right door sill, forward of right front seat) g302 Ambient light sensor Body control module (bcm) (behind left side of dash, left of steering column) Exterior lights system F1 c2 Gnd Headlight sensor Hot at all times I/p fuse block (behind left side of dash) Inside rearview mirror Interior lights system Logic Low high sensitivity setting Max Min Navigation system Off Power tops system S/roof fuse 20a S390 S394 (w/ sunroof) S420 (in trunk, at base of right rear strut tower) Sensitivity setting W/ onstar Power Mirrors Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Power Mirrors Wiring Diagram for Buick LaCrosse CX 2006: 19 Defogger system Down Driver Driver outside rearview mirror E12 G301 (inside left door sill, forward of left front seat) Hot at all times I/p fuse block (behind left side of dash) Illum Interior lights system Left Left/ right Outside rearview mirror switch Passenger Passenger outside rearview mirror Pwr/mir fuse 10a Right S501 Up/ down
POWER SEATS Driver Power Seat Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Driver Power Seat Wiring Diagram for Buick LaCrosse CX 2006: 19 D10 c2 Driver seat adjuster motor assembly Driver seat adjuster switch Forward Front down Front up Front vertical motor G301 (inside left door sill, forward of left front seat) Horizontal motor Hot at all times I/p fuse block (behind right side of dash) Nca Pwr seat circuit breaker 25a Rear down Rear up Rear vertical motor Rear- ward S330 Tan Driver"s Lumbar Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Driver"s Lumbar Wiring Diagram for Buick LaCrosse CX 2006: 11 D10 c2 Driver seat lumbar motor (in rear of driver's seat back) Driver seat lumbar switch G301 (inside left door sill, forward of left front seat) Hot at all times I/p fuse block (behind left side of dash) Out Pnk Pwr seat circuit breaker 25a S330 S331 Heated Seats Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Heated Seats Wiring Diagram for Buick LaCrosse CX 2006: 39 Body control module (bcm) (behind left side of dash, left of steering column) C2 f9 Class 2 serial data Data link connector (dlc) (under left side of dash) Driver heated seat back element (in driver's seat back) Driver heated seat cushion element (in driver's seat cushion) Driver heated seat high indicator Driver heated seat low indicator Driver heated seat switch Driver's heated seat relay (under front of driver's seat) Element Front passenger heated seat high indicator Front passenger heated seat low indicator Front passenger heated seat switch G301 (inside left door sill, forward of left front seat) Heated Heated seat element Heated seat thermistor Hot at all times Htd seat fuse 20a Hvac control module (center of dash) I/p fuse block (behind left side of dash) Inflatable restraint front passenger presence system (pps) module (under front passenger's seat) Logic Low reference Nca Passenger heated seat back element (in passenger's seat back) Passenger heated seat cushion element (under seat cover) Passenger's heated seat relay (under passenger's seat) Pnk Rly ctrl S330 S333 S379 Seat Sensor sig Sp205 (right side of dash) Tan Thermistor Passenger"s Power Seat Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Passenger"s Power Seat Wiring Diagram for Buick LaCrosse CX 2006: 19 C10 c2 Forward Front down Front up Front vertical motor G301 (inside left door sill, forward of left front seat) Horizontal motor Hot at all times I/p fuse block (behind left side of dash) Nca Passenger seat adjuster motor assembly Passenger seat adjuster switch Pwr/seat circuit breaker 25a Rear down Rear up Rear vertical motor Rear- ward S333 Tan
POWER TOP/SUNROOF Power Top/Sunroof Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Power Top/Sunroof Wiring Diagram for Buick LaCrosse CX 2006: 15 Accessory voltage Close G302 (in right door sill, forward of right front seat) Ground Hot w/ rap relay energized I/p fuse block (behind left side of dash) Open S/roof fuse 20a S390 S395 Sunroof motor (front center of sun roof module) Sunroof switch Sunroof switch close signal Sunroof switch low reference Sunroof switch open signal
POWER WINDOWS Power Windows Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Power Windows Wiring Diagram for Buick LaCrosse CX 2006: 26 (in body wiring harness) s350 (inside left door sill, forward of left front seat) g301 C1 f C2 e Down Driver window motor (in driver's door) Driver window switch Express down Express down module Front passenger window motor (in front passenger's door) Front passenger window switch G302 (in right door sill, forward of right front seat) Hot w/ rap relay energized I/p fuse block (behind left side of dash) Illum Illumination Interior lights system Left rear window motor (in left rear passenger door) Left rear window switch Lock out switch Pwr/wndw circuit breaker 25a Right rear window motor (in right rear passenger door) Right rear window switch S501 S605 Tan
RADIO Radio Wiring Diagram, with Amplifier for Buick LaCrosse CX 2006 List of elements for Radio Wiring Diagram, with Amplifier for Buick LaCrosse CX 2006: 93 (behind left side of dash) i/p fuse block (center rear of roof) radio antenna module 1-6 A10 A11 A12 Amplifier ctrl Antenna sig Audio amplifier Audio common Audio common sig B10 B11 B12 Band Bare Battery C10 C11 C12 C275 C277 Center speaker Class 2 serial data Coax Computer data lines system Ctrl sig Drain wire F center out (+) F center out (-) G200 (center of dash cross beam, behind radio) G202 (left side of dash, at base of steering column) Ground Ground distribution system Hot at all times I/p fuse block (behind left side of dash) I/p lmp vlt Inflatable restraint steering wheel module coil (in steering column) Interior lights system L audio sig L audio sig (+) Left front door speaker Left front tweeter speaker Left rear speaker Left steering wheel controls Lf low level sig (+) Lf low level sig (-) Lf spkr out (+) Lf spkr out (-) Lf tweeter out (+) Lf tweeter out (-) Lr low level sig (+) Lr low level sig (-) Lr spkr out (+) Lr spkr out (-) Mid range Nca On sig Pnk R audio sig (+) Radio Radio on sig Radio rear window antenna (center rear of roof) Rdo/ amp fuse 25a Rear sub out (+) Rear sub out (-) Rf low level sig (+) Rf low level sig (-) Rf spkr out (+) Rf spkr out (-) Rf tweeter out (+) Rf tweeter out (-) Right front door speaker Right front tweeter speaker Right rear speaker Right steering wheel controls Rr low level sig (+) Rr low level sig (-) Rr spkr out (+) Rr spkr out (-) S213 S360 (behind right taillight) S361 Satellite radio circuit Seek down Seek up Sub- woofer Tan Temp down Temp up Vehicle communication interface module (vcim) (if equipped) (behind center of dash) Vol down Vol up Radio Wiring Diagram, without Amplifier for Buick LaCrosse CX 2006 List of elements for Radio Wiring Diagram, without Amplifier for Buick LaCrosse CX 2006: 65 (center rear of roof) radio antenna module 1-6 A10 A11 A12 A4 c1 A9 c2 Antenna sig Audio common Audio common sig B10 B11 B12 Band Bare Battery C10 C11 C12 C275 C277 Class 2 serial data Coax Computer data lines system Ctrl sig Drain wire G pnk G202 (left side of dash, at base of steering column) Ground Hot at all times I/p fuse block (behind left side of dash) Inflatable restraint steering wheel module coil (in steering wheel assembly) L audio sig (+) Left front door speaker Left front tweeter speaker Left rear speaker Left steering wheel controls Lf speaker output (+) Lf speaker output (-) Lr speaker output (+) Lr speaker output (-) Nca On sig R audio sig (+) Radio Radio on sig Radio/ amp fuse 25a Rear window antenna radio (center rear of roof) Rf speaker output (+) Rf speaker output (-) Right front door speaker Right front tweeter speaker Right rear speaker Right steering wheel controls Rr speaker output (+) Rr speaker output (-) Satellite radio circuit Seek down Seek up Tan Temp down Temp up Vehicle communication interface module (vcim) (if equipped) (behind center of dash) Vol down Vol up Satellite Radio Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Satellite Radio Wiring Diagram for Buick LaCrosse CX 2006: 24 (left side of dash, left side of dash, at base of steer- ing column) g202 Antenna sig Aud common Audio common Bare Battery Coax Computer data lines system Digital radio antenna (center rear of roof) Digital radio receiver (left side of trunk) Drain wire Ground Hot at all times I/p fuse block (behind left side of dash) I/p fuse block (behind left side of dash) c1 L aud sig (+) L audio sig (+) Nca R aud sig (+) R audio sig (+) Radio Rfa/mod fuse 10a S400 Serial data
SHIFT INTERLOCK Ignition Lock Solenoid Wiring Diagram, with Console Shift for Buick LaCrosse CX 2006 List of elements for Ignition Lock Solenoid Wiring Diagram, with Console Shift for Buick LaCrosse CX 2006: 8 (left side of dash, at base of steering column) g202 Hot at all times I/p fuse block (behind left side of dash) Ignition lock cylinder control actuator (in steering column) Nca Park switch Park/switch fuse 5a S214
3.6L VIN 7 3.6L VIN 7, Shift Interlock Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.6L VIN 7, Shift Interlock Wiring Diagram for Buick LaCrosse CX 2006: 29 (behind left side of dash, left of steering column) body control module (bcm) (mounted to bank 1 cylinder head above exhaust manifold) g115 (under left side of dash) brake pedal position sensor 5 volt ref A/t shift lock control solenoid (in center console) Automatic transmission Battery positive voltage Class 2 serial data Computer data lines system E5 c1 Engine control module (ecm) (top of engine) G301 (forward of left front seat) Hazrd fuse 20a Hot at all times I/p fuse block (behind left side of dash) Low ref Module Nca P/n Park/neutral signal S116 S303 Stop lamp sw sig Switch sig a Switch sig b Switch sig c Switch sig p Transmission control Transmission internal mode switch (ims)
3.8L VIN 2 3.8L VIN 2, Shift Interlock Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, Shift Interlock Wiring Diagram for Buick LaCrosse CX 2006: 32 (behind left side of dash, left of steering column) body control module (bcm) (lower left front of engine, on transmission stud, near starter) g113 (not used) w (under left side of dash) brake pedal position sensor 10 volt ref A/t shift lock control solenoid (in center console) Automatic transmission Battery positive voltage Class 2 serial data Class 2 serial data c1 Column shift Computer data lines system Console shift E5 c1 G202 (at base of steering column) G301 (forward of left front seat) Hazrd fuse 20a Hot at all times I/p fuse block (behind left side of dash) Low ref Nca P/n Powertrain control module S101 S214 S303 Stop lamp sw sig Switch sig a Switch sig b Switch sig c Switch sig p Transmission internal mode switch (ims)
STARTING/CHARGING Charging Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Charging Wiring Diagram for Buick LaCrosse CX 2006: 39 (in i/p wiring harness, left side of dash, approximately 21 cm from lamp assembly switch towards engine compt pass-thru) (not used) a 3.6l 3.8l Batt + Battery Battery current sensor Body control module (bcm) (behind left side of dash, left of steering column) Charge indicator Clstr fuse 10a Computer data lines system Current sensor low ref Current sensor sig Ecm class 2 serial data Engine control module (ecm) (top of engine) G102 (3.6l: below right front strut tower, 3.8l: near battery) G111 (3.6l: lower left front of engine, on transmission stud, near starter, 3.8l: lower left side of engine) G202 (left side of dash, at base of steering column) Generator Generator field duty cycle sig Generator turn on sig Gnd Ground Hot at all times I/p class 2 serial data I/p dimming voltage ref I/p fuse block (behind left side of dash) Instrument panel cluster (ipc) Interior lights system Logic Pcm class 2 serial data Pcm/ecm class 2 serial data Power distribution system Powertrain control module (pcm) Red S204 S211 Splice pack sp205 (right side of dash) Starter Starting Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Starting Wiring Diagram for Buick LaCrosse CX 2006: 45 12-volt ref 3.6l 3.8l Acc Battery Battery positive Body control module (bcm) (behind left side of dash, left of steering column) C11 C12 Charging circuit Class 2 serial data Clstr fuse 10a Crank relay Crank voltage Engine control module (ecm) (3.6l) powertrain control module (pcm) (3.8l) (3.6l: top of engine) G101 (left side of front end upper tie bar, in back of headlamp) G102 (3.6l: below right front strut tower) (3.8l: near battery) G111 (3.6l: lower left front of engine, on transmission stud, near starter) (3.8l: lower left side of engine) Ground distribution system Hold- in coil Hood ajar switch (w/ remote keyless entry) (front of engine compt) Hood ajar switch sig Hot at all times Hot w/ ign 1 relay energized I/p fuse block (behind left side of dash) Ignition 1 voltage Ignition switch Instrument panel cluster (ipc) Lock Logic Pcm fuse 15 10a Pnk Power distribution system Pull- in coil Red Remote starter disabled Run S112 S200 (in steering column wiring harness, near ignition switch) Splice pack sp205 (right side of dash) Start Start enable rly ctrl Starter Starter fuse 33 40a Underhood fuse block (mounted to right strut tower)
SUPPLEMENTAL RESTRAINTS Supplemental Restraints Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006 List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006: 57 (behind right side of dash) inflatable restraint instrument panel (i/p) module (in right door sill, forward of right front seat) (in steering wheel assembly) inflatable restraint steering wheel module A10 A11 A12 A13 A14 A15 A16 A17 A18 Case ground G302 Ground I/p stage 1 high I/p stage 1 low I/p stage 2 high I/p stage 2 low Ignition 1 Inflatable restraint sensing & diagnostic module (sdm) (under right front seat) Inflatable restraint steering wheel module coil (in steering column) L front end sens sig L pretensioner high L pretensioner low L seat belt sw L side impact sig Left inflatable restraint front end sensor (front of engine compt) Left inflatable restraint roof rail module (left side roof line) Left inflatable restraint side impact sensor (in driver's door) Lf roof rail mod high Lf roof rail mod low Low ref Nca Occupant data link Pnk R front end sens sig R pretensioner high R pretensioner low R seat belt sw R side impact sig Red Rf roof rail mod high Rf roof rail mod low Right inflatable restraint front end sensor (at front of engine compt) Right inflatable restraint roof rail module (right side roof line) Right inflatable restraint side impact sensor (in front passenger's door) Sdm serial data Shorting bar Stage 1 Stage 2 Steer whl stage 1 high Steer whl stage 1 low Steer whl stage 2 high Steer whl stage 2 low Tan W/ side impact Supplemental Restraints Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006 List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006: 53 (at base of steering column) (in dash harness, at center of dash) A11 Air bag ind Airbag off Airbag on B10 B11 Batt main 1 fuse 26 40a Battery b+ Case ground Class 2 (sdm) Class 2 serial data Data link connector (dlc) (under left side of dash) Driver seat belt switch (in seat belt buckle) G202 G301 (inside left door sill, forward of left front seat) G302 (in right door sill, forward of right front seat) Ground Heated seat sig Hot at all times Hot in run & start Humidity sensor I/p fuse block (behind left side of dash) Ignition 1 Inflatable restraint front passenger presence system (pps) module (under front passenger's seat) Inflatable restraint front passenger presence system (pps) sensor Inflatable restraint passenger air bag on/off indicator Instrument panel cluster (ipc) Left inflatable restraint seat belt pretensioner (in bottom of driver's seat) Logic Mass & position Nca Occupant data link Pass airbag off ind Pass airbag on ind Passenger seat belt indicator Passenger seat belt switch (in belt belt buckle) Pnk Red Rfa/mod fuse 10a Right inflatable restraint seat belt pretensioner (in bottom of front passenger's seat) S211 S300 (at right front kick panel) S330 (in driver seat wiring harness, below driver seat, approximately 4.5 cm from breakout to seat belt switch, towards seat adjuster switch - driver) Seat belt ind Seatbelt ind Seats system Shorting bar Sir fuse 9 10a Splice pack sp205 (right side of dash) Temp sensor Underhood fuse block (mounted to right strut tower)
TRANSMISSION
3.6L VIN 7 3.6L VIN 7, A/T Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.6L VIN 7, A/T Wiring Diagram for Buick LaCrosse CX 2006: 62 (behind left side of dash, left of steering column) body control module (towards ambient light sensor) 1-2 shift sol 1-2 sol vlv ctrl 2-3 shift sol 2-3 sol vlv ctrl Automatic transmission Battery Brake pedal position sensor (under left side of dash) Code a Code b Code c Data link connector (under left side of dash) Engine control module (top of engine) G115 (mounted to bank 1 cylinder head above exhaust manifold) Gmlan serial data Ground Hot at all times Hot in run or start Ign 1 Ign 3 voltage Iss high sig Iss low sig Low ref P/n P/n signal Parity Pc sol vlv ctrl Pc sol vlv hi ctrl Pnk Pressure control solenoid Red Red s115 S116 S201 S202 Serial data bus+ Serial data bus- Stop lp sw Stop lp sw sig Sw sig Tan b Tcc pwm sol ctrl Tcc rel sw sig Tcc release switch Tcc sol valve Tcm fuse 8 15a Tft sens sig Trans range a Trans range b Trans range c Trans range p Trans sol fuse 21 10a Transmission control module (tcm) Transmission fluid pressure manual valve position switch Transmission fluid temperature sensor Transmission input shaft speed sensor Transmission internal mode switch Underhood fuse block (mounted to right strut c1 tower) Vehicle speed sensor (on transmission output shaft) Vss hi sig Vss low sig
3.8L VIN 2 3.8L VIN 2, A/T Wiring Diagram for Buick LaCrosse CX 2006 List of elements for 3.8L VIN 2, A/T Wiring Diagram for Buick LaCrosse CX 2006: 59 (not used) (top right of intake manifold) 1-2 shift sol 1-2 shift solenoid 2-3 shift sol 2-3 shift solenoid 5 volt ref 2 Acc At iss sig high At iss sig low Automatic transmission Battery Code a Code b Code c Ect sensor sig Engine coolant temperature sensor Fluid temp sensor G113 (on transaxle stud, near starter) Ground Hot at all times Hot in run or start Ignition 1 Ignition 3 Ignition switch Input shaft speed sensor Lock Low ref Manifold absolute pressure sensor Map sensor sig Parity Pc sol high Pc sol low Pcm fuse 15 10a Pcm/ etc fuse 16 15a Pnk Powertrain control module Pressure control solenoid Red a Red s115 Run S101 (approximately 5 cm from breakout to pcm) Start Tan b Tcc release switch Tcc sol Tcc sw sig Tft sensor sig Torque converter clutch solenoid Tr sig a Tr sig b Tr sig c Tr sig p Trans sol fuse 21 10a Transmission internal mode switch Underhood fuse block (mounted to right strut tower) Vehicle speed sensor (on transmission out put shaft) Vss sig high Vss sig low
TRUNK, TAILGATE, FUEL DOOR Trunk Release Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Trunk Release Wiring Diagram for Buick LaCrosse CX 2006: 31 (not Battery Body control module (bcm) (behind left side of dash, left of steering column) Class 2 serial Class 2 serial data Clstr fuse 10a Computer data lines system Door locks system Drv dr lk sw unlock sig E8 c1 Early production Enable signal G200 (center of dash cross beam, behind radio) G302 (in right door sill, forward of right front seat) Ground Hazrd fuse 20a Hot at all times I/p fuse block (behind left side of dash) Instrument panel cluster (ipc) Lid ajar switch Lid release sw Logic Message center Pas dr lk sw unlk sig Rear compartment lid latch (in rear compt lid) Remote control door lock receiver (rcdlr) (on right side of rear package shelf) S406 Trunk ajar ind Trunk open Trunk release control c2 Used) c200
WARNING SYSTEMS Warning Systems Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006 List of elements for Warning Systems Wiring Diagram (1 of 2) for Buick LaCrosse CX 2006: 44 (inside left door sill, forward of left front seat) g301 Ajar Auto Battery Body control module (bcm) (behind left side of dash, left of steering column) Chmsl/ bkup fuse 15a Door lock ajar indicator switch Dr/lck trunk fuse 15a Driver door lock Ext lmps off input G102 (3.6l) (below right front strut tower) G102 (3.8l) (near battery) G111 (3.6l) (lower left front of engine, on transmission stud, near starter G111 (3.8l) (lower left side of engine) G200 (center of dash cross beam, behind radio G201 (below dash, bolted to dash carrier) G202 (left side of dash, at base of steering column) G301 (inside left door sill, forward of left front seat) Ground Hazrd fuse 20a Head Hot at all times I/p fuse block (behind left side of dash) Ignition switch Int/ illum fuse 10a Key in ignition switch Key in sig Lamp switch assembly Left rear door lock Lf ajar sw sig Lr ajar sw sig Off Park Park brake sw Park brake switch (on park brake assembly) Rf ajar sw sig Rr ajar sw sig S211 S214 S303 S500 Serial data Underhood fuse block (mounted to right strut tower) Washer/ rvc fuse 6 15a Warning Systems Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006 List of elements for Warning Systems Wiring Diagram (2 of 2) for Buick LaCrosse CX 2006: 34 (left side of trunk) digital radio receiver A11 A14 A16 Abs/tcs class 2 serial data Ajar Check tire pressure indicator Class 2 Door lock ajar indicator switch Driver seat belt switch Front passenger door lock G301 (inside left door sill, forward of left front seat) G302 (in right door sill, forward of right front seat) I/p fuse block (behind left side of dash) Inflatable restraint passenger air bag on/off indicator Inflatable restraint sensing & diagnostic module (sdm) (under right front seat) Instrument panel cluster (ipc) Ipc class 2 serial data Left seat belt sw Logic Nca Pass seat belt ind Passenger seat belt indicator Passenger seat belt switch Radio Red Right rear door lock Right seat belt sw S406 S604 Sdm class 2 serial data Seat belt indicator Serial data Sp205 (right side of dash)
WIPER/WASHER Wiper/Washer Wiring Diagram for Buick LaCrosse CX 2006 List of elements for Wiper/Washer Wiring Diagram for Buick LaCrosse CX 2006: 58 A14 A15 B14 Battery Body control module (bcm) (behind left side of dash, left of steering column) C14 C15 C2 f4 Class 2 serial data D5 c3 Delay switch E14 E15 F10 F11 F12 F14 G100 (in back of right headlamp on frame) G14 G15 G200 (center of dash cross beam, behind radio) Ground High Hot at all times Instrument panel cluster (ipc) Int Logic Low Low wash indicator Low washer fluid Low washer fluid ind sig Message center Mist Off Park sw sig Park switch Pnk Red S124 Splice pack sp205 (right side of dash) Tan Turn signal/ multifunction switch Underhood fuse block (mounted to right strut tower) Washer pump ctrl Washer switch Washer/ rvc fuse 6 15a Windshield washer fluid level switch (right front corner of engine compt, in washer fluid reservoir) Windshield washer fluid pump (on right front corner of engine compt, in washer fluid reservoir) Windshield washer sw sig c3 Windshield wiper motor (on left side of firewall) Windshield wiper sw high sig Windshield wiper sw low sig Windshield wiper switch Wiper hi relay Wiper high speed rly ctrl Wiper relay Wiper rly ctrl Wiper/ ws fuse 5 25a
