GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2006 🢒 Lucerne 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 Harness Routing Views
Figure 1:

Front Fascia and Headlight Harnesses
Object Number: 1703062 Size: LF
(1)C113
(2)Fuse Block - Underhood C1
(3)G104
(4)C120
(5)S124
(6)C114
(7)S125
(8)Front Fascia
Figure 2:

Engine Harness Routing (L26)
Object Number: 1709222 Size: LF
(1)S109
(2)G114
(3)C111 Engine Harness to Body Harness
(4)S114
(5)S113
(6)SP100 (Early Production)
(7)Automatic Transmission Connector
(8)S106
(9)S108
(10)S101
(11)Fuse Block-Underhood C3
(12)C110 Engine Harness to Ignition Control Module Harness
(13)S115
(14)S116
Figure 3:

Engine Harness - Front (L37/LD8)
Object Number: 1619134 Size: LF
(1)Fuse Block - Underhood C3
(2)S111
(3)S100
(4)C139
(5)S105
(6)S106
(7)Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Connector
(8)Transmission Control Module (TCM) C1 Connector
(9)Engine Control Module (ECM) C3
(10)Engine Control Module (ECM) C2
(11)Engine Control Module (ECM) C1
(12)S114
(13)S113
(14)C101
(15)Electronic Brake Control Module (EBCM) Connector
(16)G115
(17)G114
Figure 4:

Engine Harness - Rear (L37/LD8)
Object Number: 1619136 Size: LF
(1)Engine Control Module (ECM) C3
(2)C111
(3)S110
(4)C138
(5)S102
(6)Intake Manifold
(7)C161
(8)C140
(9)S116
(10)S115
(11)G100
(12)G112
(13)G115
(14)G114
(15)S113
(16)S114
(17)Electronic Brake Control Module (EBCM) Connector
(18)C175
(19)Engine Control Module (ECM) C2
(20)Engine Control Module (ECM) C1
Figure 5:

I/P Harness
Object Number: 1703111 Size: LF
(1)C208
(2)S206
(3)S202
(4)S212
(5)S210
(6)S200
(7)C219 (A51)
(8)S207
(9)S208
(10)C201
(11)C203
(12)S203
(13)S213
(14)S229
(15)C202
(16)S211
(17)S230
(18)C200
Figure 6:

Body Harness - Engine Compartment
Object Number: 1703075 Size: LF
(1)S128
(2)C100
(3)C111
(4)S127
(5)S126
(6)G101
(7)Fuse Block - Underhood C2
(8)C120
(9)S129
Figure 7:

Body Harness - Passenger Compartment
Object Number: 1703104 Size: LF
(1)Body Harness
(2)Dash Panel
(3)S377
(4)S376
(5)C301
(6)C325
(7)C326
(8)C314
(9)S343
(10)C330
(11)C335
(12)S370
(13)SP300
(14)G301
(15)S302
(16)C328
(17)S333
(18)G300
(19)C315
(20)G305
(21)C340 (A51)
(22)S379
(23)S378
(24)C300
(25)C316
(26)C202
(27)C205
(28)C201
(29)G302
(30)G304
(31)S375
(32)C206
(33)C200
Figure 8:

Body Harness - Rear Compartment
Object Number: 1703108 Size: LF
(1)S324
(2)C397 (CF5)
(3)S316
(4)C499
(5)G403
(6)C492
(7)C493
(8)C498
(9)G402
(10)S385
(11)C321
(12)G306
(13)S365
(14)S366 (UQA)
(15)C445
(16)S372
(17)S323
(18)S317
(19)S337
Figure 9:

Driver Door Harnesses
Object Number: 1703058 Size: LF
(1)Door Frame
(2)C501
(3)C300
Figure 10:

Passenger Door Harnesses
Object Number: 1703056 Size: LF
(1)C301
(2)C601
(3)Door Frame
Figure 11:

LR Door Harnesses
Object Number: 1703055 Size: LF
(1)Door Frame
(2)C700
(3)C330
(4)S700
Figure 12:

RR Door Harnesses
Object Number: 1703052 Size: LF
(1)C328
(2)C800
(3)Door Frame
(4)S800
Figure 13:

Drivers Seat Harness
Object Number: 1703060 Size: LF
(1)Lumbar Sensor Connector
(2)Lumbar Motor Connector
(3)Seat Frame
(4)S305
(5)S356
(6)S352
(7)S355
(8)S359
(9)S351
(10)S349
(11)C315
Figure 14:

Passenger Seat Harness
Object Number: 1703059 Size: LF
(1)S358
(2)Lumbar Assembly Connector
(3)Seat Frame
(4)S360
(5)S357
(6)S306
(7)C314
(8)S348
Figure 15:

Headliner Harness (w/o CF5)
Object Number: 1703064 Size: LF
(1)Headliner
(2)S385
(3)S328
(4)S313
(5)S312
(6)C321
Figure 16:

Headliner Harness (CF5)
Object Number: 1703065 Size: LF
(1)S334
(2)C399
(3)S385
(4)S328
(5)S312
(6)S313
(7)C321
(8)Headliner
Figure 17:

Rear Shelf Harness
Object Number: 1703063 Size: LF
(1)C445
(2)Rear Shelf
(3)Speaker Grill
Figure 18:

Rear Fascia Harness
Object Number: 1703061 Size: LF
(1)C494 (UD7)
(2)S401
(3)S404
(4)Rear Fascia
(5)S402
(6)S400