Harness Routing Views. Buick LaCrosse 2005

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2005 🢒 LaCrosse 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Harness Routing Views

Figure 1:

Forward Lamp Harness


(1)	Fuse Block - Underhood C3
(2)	S112
(3)	C141
(4)	C143
(5)	G101
(6)	Cooling Fan - Left Connector
(7)	Cooling Fan - Right Connector
(8)	G100
(9)	C142
(10)	C144
(11)	S124
(12)	C120

Figure 2:

Front of the Engine (L26)


(1)	Fuse Block - Underhood C1
(2)	C110
(3)	S109
(4)	C126
(5)	S102
(6)	Throttle Actuator Control (TAC) Module Connector
(7)	S101
(8)	C101
(9)	Electronic Brake Control Module (EBCM) Connector
(10)	S117 (NU3)
(11)	Powertrain Control Module (PCM) C2 Connector
(12)	Powertrain Control Module (PCM) C3 Connector
(13)	Powertrain Control Module (PCM) C1 Connector
(14)	C100
(15)	Wheel Speed Sensor (WSS) - LF Connector
(16)	S114 (NU3)
(17)	G115 (NU3)
(18)	G115 (JL9)
(19)	Wheel Speed Sensor (WSS) - RF Connector
(20)	C104

Figure 3:

Rear of the Engine (L26)


(1)	C101
(2)	Evaporative Emission (EVAP) Canister Purge Solenoid
(3)	Fuse Block - Underhood C1
(4)	C104
(5)	Wheel Speed Sensor (WSS) - RF Connector
(6)	Engine Oil Pressure (EOP) Sensor Connector
(7)	Heated Oxygen Sensor (HO2S) Connector
(8)	Wheel Speed Sensor (WSS) - LF Connector
(9)	C100
(10)	S113 (NU3)
(11)	Electronic Brake Control Module (EBCM) Connector

Figure 4:

Front of the Engine (LY7)


(1)	C107
(2)	S121
(3)	S120
(4)	S110
(5)	S119
(6)	C109
(7)	S103
(8)	S131
(9)	S133
(10)	G131
(11)	Engine Coolant Temperature (ECT) Sensor
(12)	Starter Solenoid
(13)	Starter
(14)	Engine Oil Pressure (EOP) Sensor

Figure 5:

Rear Cyliner Head (LY7)


(1)	Cylinder Block
(2)	Throttle Actuator Control (TAC) Module Connector
(3)	S108
(4)	Engine Control Module (ECM) C1 Connector
(5)	C107
(6)	G115
(7)	S131
(8)	S130
(9)	G130

Figure 6:

I/P Harness


(1)	Brake Fluid Level Switch
(2)	S213
(3)	S211
(4)	C104
(5)	C108
(6)	Fuse Block - Underhood C2
(7)	Fuse Block - Underhood C4
(8)	C120
(9)	G201
(10)	C210
(11)	Fuse Block - I/P
(12)	C200
(13)	G200
(14)	G202
(15)	C201
(16)	SP205
(17)	Data Link Connector (DLC)
(18)	Body Control Module (BCM) C1
(19)	C208
(20)	S204
(21)	S216
(22)	C102
(23)	C101

Figure 7:

Body Harness - Front


(1)	C356
(2)	C241
(3)	C240
(4)	C355
(5)	C208
(6)	Body Control Module (BCM) C2
(7)	S303
(8)	C301
(9)	G301
(10)	S350
(11)	C311
(12)	C313
(13)	G302
(14)	C302
(15)	Fuse Block - I/P C2
(16)	C200
(17)	S300
(18)	Inflatable Restraint Sensing and Diagnostic Module (SDM)
(19)	S406

Figure 8:

Body Harness - Rear Shelf


(1)	Center High Mount Stop Lamp (CHMSL)
(2)	C305

Figure 9:

Body Harness - Rear


(1)	C402
(2)	C450
(3)	C390
(4)	S360
(5)	S361
(6)	Rear Object Sensor Control Module Connector (UD7)
(7)	C401
(8)	C406
(9)	Evaporative Emission (EVAP) Canister Vent Solenoid Valve
(10)	Rear Floor Pan
(11)	C405
(12)	S420
(13)	S407
(14)	C400

Figure 10:

Console Harness


(1)	Auxiliary Power Outlet
(2)	C240

Figure 11:

Steering Column


(1)	Steering Angle Sensor
(2)	C201
(3)	A/T Shiftlock Solenoid Connector
(4)	Horn Switch Connector
(5)	C277
(6)	Steering Wheel Controls
(7)	Multifunction Accessory Switch
(8)	Body Control Module (BCM) Connector

Figure 12:

Headliner Harness (CF5)


(1)	C390
(2)	Dome/Reading Lamp - Left Connector
(3)	Headliner
(4)	C317
(5)	Inside Rearview Mirror (ISRVM) Connector
(6)	Reading Lamp Overhead Console
(7)	C318
(8)	C398
(9)	S394
(10)	S393
(11)	S398

Figure 13:

Driver Door Frame and Trim Harnesses


(1)	Door Frame
(2)	Door Trim Panel
(3)	Door Latch Connector
(4)	S502
(5)	S501
(6)	C501
(7)	C260
(8)	S500

Figure 14:

Passenger Door Frame and Trim Harnesses


(1)	Door Trim Panel
(2)	Door Frame
(3)	S604
(4)	C261
(5)	C601
(6)	S605
(7)	Door Latch Connector

Figure 15:

Driver Seat


(1)	Seat Belt Pretensioner - Left
(2)	Lumbar Motor
(3)	S330
(4)	Lumbar Adjuster Switch - Driver
(5)	Seat Adjuster Switch - Driver
(6)	S331
(7)	Heated Seat Relay
(8)	C311
(9)	C316
(10)	Seat Adjuster Motor Assembly Connector

Figure 16:

Passenger Seat


(1)	C313
(2)	Inflatable Restraint Passenger Presence System (PPS) Module
(3)	S333

Figure 17:

LR Door Harness


(1)	Window/Door Lock Switch Connector
(2)	Door Frame
(3)	Door Lock Actuator
(4)	Door Trim Panel
(5)	Window Motor Connector
(6)	C355

Figure 18:

RR Door Harness


(1)	Door Frame
(2)	Window/Door Lock Switch Connector
(3)	C356
(4)	Window Motor
(5)	Door Trim Panel
(6)	Door Latch Assembly Connector

Figure 19:

Object Sensor and License Lamp Harnesses


(1)	Rear Fascia
(2)	C450
(3)	S450
(4)	S451
(5)	S401
(6)	S402
(7)	C406