GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 Ground Views
Figure 1:

Front Fascia and Headlight Harnesses
Object Number: 1703062 Size: LF
(1)X113
(2)Fuse Block - Underhood X1
(3)G104
(4)X120
(5)J124
(6)X114
(7)J125
(8)Front Fascia
Figure 2:

Front of the Engine (LD8)
Object Number: 1920013 Size: LF
(1)J105
(2)J106
(3)G115
(4)X101
(5)G112
(6)G114
(7)J100
(8)X139
(9)J111
Figure 3:

Rear of the Engine (LD8)
Object Number: 1920127 Size: LF
(1)J110
(2)J102
(3)X138
(4)X140
(5)G111
(6)G100
(7)J113
(8)J114
(9)X161
(10)X111
Figure 4:

Body Harness - Front Engine Compartment
Object Number: 1920226 Size: LF
(1)J127
(2)X100
(3)X111
(4)J126
(5)G101
(6)X120
(7)J128
(8)J129
Figure 5:

Body Harness - Left Front Passenger Compartment
Object Number: 1920490 Size: LF
(1)J302
(2)X710
(3)X315
(4)J379
(5)J378
(6)X201
(7)X500
(8)X205
(9)X207
(10)X216
(11)X340 (A51)
(12)G305
(13)G300
Figure 6:

Body Harness - Right Front Passenger Compartment
Object Number: 1920466 Size: LF
(1)X206
(2)X200
(3)J377
(4)J376
(5)X600
(6)X325
(7)X326
(8)X314
(9)X810
(10)J343
(11)J370
(12)G302
(13)G304
Figure 7:

Body Harness - Left Rear Luggage Compartment
Object Number: 1920499 Size: LF
(1)X901
(2)X498
(3)X321
(4)X311 (AY0)
(5)G306
(6)J366 (UQA)
(7)X445
(8)J372
(9)G301
(10)J365
(11)J385
(12)G402
Figure 8:

Body Harness - Right Rear Luggage Compartment
Object Number: 1920506 Size: LF
(1)J324
(2)G306
(3)X397 (CF5)
(4)X499
(5)X900
(6)G403
(7)J316
(8)X497
Figure 9:

Right Front of the Engine Compartment
Object Number: 1707099 Size: LF
(1)G104
(2)Fuse Block - Underhood
(3)G111
Figure 10:

G101
Object Number: 1707103 Size: LF
(1)Left Front Strut Tower
(2)G101
Figure 11:

Left Side of Engine (LD8/L37)
Object Number: 1978253 Size: LF
(1)Engine - 4.6L
(2)A/C Compressor Clutch
(3)Generator
(4)G110
Figure 12:

G112, G114, and G115 (LD8/L37)
Object Number: 1707088 Size: LF
(1)Exhaust Manifold
(2)G114
(3)G112
(4)G115
Figure 13:

Near the Rear Cylinder Head (LD8/L37)
Object Number: 1707093 Size: LF
(1)Exhaust Gas Recirculation (EGR) Valve
(2)Valve Cover
(3)G100
(4)Engine Coolant Temperature (ECT) Sensor
Figure 14:

G306
Object Number: 1707097 Size: LF
(1)G306
(2)Left Rear C - Pillar
(3)Rear Seat
Figure 15:

Under the Rear Seat
Object Number: 2005000 Size: LF
(1)JX300
(2)Fuse Block - Rear
(3)G301
(4)Inflatable Restraint Sensing and Diagnostic Module (SDM)
(5)Battery Current Sensor
(6)G303
(7)X335
(8)Battery
(9)Rear Seat
Figure 16:

Right Rear of the Passenger Compartment
Object Number: 1707175 Size: LF
(1)Right Rear C-Pillar
(2)G307
(3)G403
(4)Deck Lid
Figure 17:

Front Floor Panel Grounds
Object Number: 1707178 Size: LF
(1)Floor Panel
(2)G304
(3)G302
(4)G300
(5)G305
Figure 18:

Body Harness - Rear Compartment
Object Number: 1703108 Size: LF
(1)J324
(2)X397 (CF5)
(3)J316
(4)X499
(5)G403
(6)X492
(7)X493
(8)X498
(9)G402
(10)J385
(11)X321
(12)G306
(13)J365
(14)J366 (UQA)
(15)X445
(16)J372
(17)J323
(18)J317
(19)J337