GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 DeVille 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Harness Routing Views
Figure 1:

Left Front of the Vehicle
Object Number: 321217 Size: LF
(1)C103 (Right), C104 (Left)
(2)S132 (Right), S133 (Left)
(3)S134 (Right), S131 (Left)
Figure 2:

Left Front of the Vehicle (DeVille)
Object Number: 321308 Size: LF
(1)S147 (Right), S148 (Left)
(2)S145 (Right), S144 (Left)
(3)C103 (Right), C104 (Left)
Figure 3:

Left Front of the Vehicle Behind the Front Fascia
Object Number: 321311 Size: LF
(1)C104
Figure 4:

Engine Compartment, Front
Object Number: 321313 Size: LF
(1)Right Cooling Fan Motor
(2)S117
(3)Engine Cooling Fan Relay 3
(4)Engine Cooling Fan Relay 2
(5)Engine Cooling Fan Relay 1
(6)S130
(7)S129
(8)Left Cooling Fan Motor
Figure 5:

Engine Compartment, Left Front
Object Number: 321315 Size: LF
(1)G101
(2)G110
(3)S106
Figure 6:

Engine Compartment, Near the Left Strut Tower
Object Number: 321318 Size: LF
(1)Engine Compartment Fuse/Relay Center
(2)Inadvertant Power Relay
(3)S112
(4)Engine Compartment Relay Center
(5)Starter Enable Relay
(6)Ignition 1 Relay
(7)Right MaxiFuse® Block
(8)S121
(9)S119
(10)Left MaxiFuse® Block
(11)S154
(12)S122
(13)C101
(14)S105
(15)S104
Figure 7:

Engine Compartment, in the Left Rear Corner
Object Number: 321319 Size: LF
(1)S102
(2)Harness to the Brake Fluid Level Sensor
(3)S101
(4)P106 (right), P105 (left similar)
(5)P101
(6)Harness to the Wiper Motor
(7)S100
Figure 8:

Right Front of the Vehicle, Behind the Front Fascia
Object Number: 321325 Size: LF
(1)C103
(2)Impact Bar
(3)Right Horn
(4)Right Horn
(5)S108
(6)S109
Figure 9:

Engine Compartment, Right Front Corner
Object Number: 321328 Size: LF
(1)G100
(2)Daytime Running Lamps (DRL) Resistor (DeVille)
(3)Battery
Figure 10:

Right Front Fender (Export)
Object Number: 321332 Size: LF
(1)C122 (Right), C120 (Left)
(2)Right Repeater Lamp (Left Similar)
Figure 11:

Engine Compartment, Right Rear
Object Number: 321334 Size: LF
(1)P100
Figure 12:

Engine, Lower Right Front


Object Number: 321338 Size: LF
(1)A/C High Pressure Switch
(2)S153
(3)A/C Compressor Clutch Diode
(4)S152
(5)A/C Compressor Clutch
Figure 13:

Engine, Top Left
Object Number: 321342 Size: LF
(1)Mass Air Flow (MAF) Sensor
(2)S126
(3)S125
(4)Throttle Postion (TP) Sensor
(5)Idle Air Control (IAC) Valve
Figure 14:

Engine, Left Side
Object Number: 321343 Size: LF
(1)C127
(2)S124
(3)Harness to the Powertrain Control Module (PCM)
(4)S123
Figure 15:

Engine, Top of the Intake
Object Number: 321346 Size: LF
(1)Fuel Injector 7
(2)S110
(3)S111
(4)Fuel Injector 8
(5)Fuel Injector 6
(6)Fuel Injector 4
(7)Fuel Injector 2
(8)Fuel injector 1
(9)Fuel Injector 3
(10)Fuel Injector 5
Figure 16:

Engine, on the Lower Left Front Corner
Object Number: 321347 Size: LF
(1)C100
(2)G107
(3)S118
Figure 17:

Engine Compartment, on the Top of the Transmission
Object Number: 321349 Size: LF
(1)Park Netural Postion (PNP) Switch
(2)S149
Figure 18:

Engine, Left Rear
Object Number: 321351 Size: LF
(1)Engine Coolant Temperature (ECT) Sensor
(2)Variable Steering Solenoid
(3)S127
Figure 19:

Engine, Right Rear
Object Number: 321354 Size: LF
(1)S223
(2)S222
(3)Power Steering Pressure Switch (PSP)
Figure 20:

Engine, Right Rear
Object Number: 321357 Size: LF
(1)C131
(2)Camshaft Position (CMP) Sensor
Figure 21:

IP Wiring Harness
Object Number: 321363 Size: LF
(1)S218
(2)S217
(3)Inflatable Restraint IP Module
(4)C203
(5)S215
(6)S216
(7)S201
(8)Headlamp Switch
(9)S220
(10)S219
Figure 22:

Instrument Panel, Below the Upper Pad
Object Number: 321366 Size: LF
(1)S207
(2)S210
(3)S206
(4)Instrument Cluster
Figure 23:

Instrument Panel, Below the Left Side
Object Number: 321367 Size: LF
(1)G203 (Hidden)
(2)S200
(3)S202
(4)G204
(5)S201
(6)S205
Figure 24:

Instrument Panel, at the Base of the Steering Column
Object Number: 321371 Size: LF
(1)Steering Column
(2)P101
(3)Steering Wheel Postion Sensor (SWPS)
(4)C202
(5)C206
Figure 25:

Instrument Panel, Below the Steering Column
Object Number: 321377 Size: LF
(1)S225
(2)S226
(3)Brake Pedal
(4)Stoplamp/ BTSI Switch
(5)ABS/TCC Switch
(6)Steering Column Support Bracket
Figure 26:

Instrument Panel, Below the Right Side
Object Number: 321382 Size: LF
(1)C201
(2)S221
(3)C205
(4)Heater and A/C Programmer
Figure 27:

Instrument Panel, Behind the Right Side Knee Bolster
Object Number: 321384 Size: LF
(1)P100
(2)Vacuum and Electric Solenoid
(3)S212
(4)S211
(5)C205
(6)C207
(7)S223
(8)S222
Figure 28:

IP, Below the Right Side
Object Number: 321386 Size: LF
(1)G201
(2)S323
(3)S203
(4)G205
Figure 29:

Headliner, Top
Object Number: 321387 Size: LF
(1)Headliner
(2)S336
(3)S335
(4)S341
(5)S342
(6)S338
(7)S339
(8)S332 (Concours/ D' Elegance)
(9)S334 (Concours / D'Elegance)
(10)S366 (ECT)
(11)S332 (Deville)
(12)S333
(13)S334 (Deville)
(14)S337
(15)S340
(16)S359 (Concours / D' Elegance)
Figure 30:

Headliner, at the Rear of the Sunroof
Object Number: 321390 Size: LF
(1)Sunroof Control Module
(2)Sunroof Actuator
(3)C360
Figure 31:

Below the Center Console
Object Number: 321393 Size: LF
(1)S346
(2)S343
(3)S345
(4)S347
(5)S344
Figure 32:

Passenger Compartment, Under the Left Kick Panel
Object Number: 321395 Size: LF
(1)Accessory Time Delay Relay
(2)S307
(3)S322
(4)S203
(5)S320
(6)Harness to the SDM
(7)S316
(8)S317
(9)S371
(10)S319
(11)S318
Figure 33:

Passenger Compartment, Below the Left Front Seat
Object Number: 321396 Size: LF
(1)S313
(2)G302
(3)S314
(4)S312
(5)S311
(6)C302
(7)C305
(8)C316 (left), C317 (right)
Figure 34:

Passenger Compartment, Below the Left Front Seat
Object Number: 321397 Size: LF
(1)Inflatable Restraint Sensing and Diagnostic Module (SDM)
(2)G306
Figure 35:

Passenger Compartment, Below the Right Front Seat
Object Number: 321399 Size: LF
(1)Radio Connector Breakout Harness
(2)S324
(3)S325
(4)S326
(5)C307
(6)Cross Car Breakout Harness
(7)S315
(8)C309
(9)C301
(10)C308
Figure 36:

Left Front Seat
Object Number: 321401 Size: LF
(1)Left Lumbar Horizontal Motor
(2)Left Lumbar Vertical Motor
(3)S321
(4)S331
Figure 37:

Passenger Compartment, Right Front Seat (Left Similar)
Object Number: 321402 Size: LF
(1)Seat Rear Vertical Motor (Hidden)
(2)Seat Recline Postion Sensor
(3)Seat Recline Motor
(4)S351 (Left), S356 (Right)
(5)S352 (Left), S357 (Right)
(6)C323 (Left) (Hidden)
(7)C305 (Eldorado), C306 (DeVille)
(8)Seat Horizontal Postion Sensor
(9)Seat Rear Vertical Postion Sensor
(10)Memory Seat Module (MSM)
(11)Seat Horizontal Motor
(12)C320 (Left), C321 (Right) (Hidden)
(13)Seat Lumbar Vertical Relay
(14)Lumbar Switch
(15)Seat Switch
(16)Seat Front Vertical Motor
(17)Lumbar Horizontal Relay
(18)S349 (Left), S348 (Right)
Figure 38:

Passenger Compartment, Under the Front Seat
Object Number: 321405 Size: LF
(1)C306 (Left), C304 (Right)
(2)C305 (Left), C303 (Right)
Figure 39:

Passenger Compartment, Right Rear
Object Number: 321408 Size: LF
(1)Rear Cross Car Breakout
(2)S327
(3)S360
(4)S402
(5)S432
(6)S434
(7)C401
(8)S328
(9)S329
Figure 40:

Passenger Compartment on the Left Sail Panel
Object Number: 321409 Size: LF
(1)C313
(2)C315
Figure 41:

Passenger Compartment, on the Right Sail Panel
Object Number: 321411 Size: LF
(1)Right Seat Belt Retractor Actuator (Left Similar)
(2)C314
Figure 42:

Passenger Compartment, Behind the Rear Seat
Object Number: 321412 Size: LF
(1)Continuously Variable Road Sensing Suspension (CVRSS) Module
(2)G403
(3)Remote Function Actuator (RFA) Module
(4)Radio Amplifier/Radio Interface Module (RIM)
(5)Rear Compartment Fuse Block
(6)Body Control Module (PZM)
(7)S410
(8)S430
(9)Rear Compartment Relay Block # 4
(10)Rear Compartment Relay Block # 3
(11)Rear Compartment Relay Block # 2
(12)Rear Compartment Relay Block # 1
(13)P400
(14)Rear Compartment Relay Block # 5
(15)S431
(16)Power Door Lock Relay
Figure 43:

Passenger Compartment, Left Rear Side
Object Number: 321414 Size: LF
(1)S300
(2)S301
(3)S302
(4)S303
(5)S304
(6)S305
(7)S365
(8)S306
(9)S354
(10)S307
(11)S373
(12)S372
(13)S308
(14)S309
(15)S406 (Eldorado)
(16)S310
(17)Rear Cross Car Breakout Harness
Figure 44:

Left Front Door
Object Number: 321416 Size: LF
(1)S505
(2)S502
(3)S506
(4)S501
(5)S500
(6)P500
(7)C502
(8)Left Front Window Motor
Figure 45:

Passenger Compartment, Below the Rear Seat
Object Number: 321417 Size: LF
(1)#4 Bar
(2)G400
(3)G401
(4)S402
(5)S405
(6)S401
(7)S407
(8)S406 (DeVille)
(9)S404
(10)S408
(11)S409
Figure 46:

Right Rear Door (DeVille)
Object Number: 321418 Size: LF
(1)Right Rear Window Motor (Left Similar)
(2)P700 (Left), P800 (Right)
Figure 47:

Right Front Door
Object Number: 321421 Size: LF
(1)C602
(2)Right Front Window Motor
(3)S600 (DeVille)
(4)S323
(5)S211
(6)S212
(7)P600
Figure 48:

Left of the Rear Compartment
Object Number: 321424 Size: LF
(1)S414
(2)S403
(3)S411
(4)S412
(5)S415
(6)S416
(7)S418
(8)S417
(9)C425 (Taped in the Harness) (DeVille)
(10)Fuel Door Release Actuator
(11)Harness to the Rear Compartment Lid
Figure 49:

Right Rear of the Vehicle (DeVille)
Object Number: 321429 Size: LF
(1)S480 (Right), S481 (Left)
(2)C422 (Right), C420 (Left)
(3)S423 (Left), S424 (Right)
(4)S457 (Left), S458 (Right)
Figure 50:

Rear of the Rear Compartment
Object Number: 321431 Size: LF
(1)S457, S450, S423 (Hidden)
(2)P404
(3)S481
(4)S457
(5)C420
(6)S423
(7)G402
(8)C426
(9)S424
(10)S458
(11)S480
(12)P406
(13)C422
(14)Rear Compartment Lid Pull Down Motor
Figure 51:

Rear Compartment Lid
Object Number: 321433 Size: LF
(1)C408
Figure 52:

Rear of the Vehicle, Below the Passenger Compartment
Object Number: 321436 Size: MF
(1)RH Rear Suspension Postion Sensor Connector
(2)RH Rear Strut Actuator Connector
(3)C412
(4)LH Rear Strut Actuator Connector
(5)LH Rear Suspension Postion Sensor Connector
Figure 53:

Below the Right Rear of the Vehicle
Object Number: 321440 Size: LF
(1)C415
(2)Automatic Level Control Compressor
(3)RH Rear Wheel Speed Sensor (LH Similar)