GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2002 🢒 Eldorado 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 Harness Routing Views
Figure 1:

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

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

Engine Compartment, Left Front
Object Number: 321315 Size: LF
(1)G101
(2)G110
(3)S106
Figure 4:

Engine Compartment, on the Left Side
Object Number: 798114 Size: LF
(1)Fuse Block - Underhood
(2)Inadvertant Power Relay
(3)S112
(4)Relay Block - Underhood
(5)Starter Relay
(6)Secondary Air Injection (AIR) Pump Relay
(7)Ignition 1 Relay
(8)Fuse Block Right Underhood
(9)S121
(10)S119
(11)Fuse Block - Left Underhood
(12)S154
(13)S122
(14)C101
(15)Fuse Block - Underhood
(16)S104 and S105
Figure 5:

Engine, RH Front
Object Number: 321360 Size: LF
(1)G100
(2)Battery
(3)G105
Figure 6:

Engine Compartment, Left Rear Corner
Object Number: 321319 Size: LF
(1)S102
(2)Harness to the Brake Fluid Level Switch
(3)S101
(4)P106 (RH), P105 (LH Similar)
(5)P101
(6)Harness to the Windshield Wiper/Washer Module
(7)S100
Figure 7:

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 8:

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 9:

Engine, Left Side
Object Number: 778389 Size: LF
(1)S124
(2)Harness to the Powertrain Control Module (PCM)
(3)S123
Figure 10:

Engine, Fuel Rail and Intake Area
Object Number: 321346 Size: LF
(1)Fuel Injector 7
(2)S110
(3)S111
(4)Fuel Injector 8
(5)Fuel Injector 6
(6)Fuel Injector4
(7)Fuel Injector 2
(8)Fuel injector 1
(9)Fuel Injector 3
(10)Fuel Injector 5
Figure 11:

Engine, on the Lower Left Front Corner
Object Number: 800550 Size: LF
(1)C100
(2)G103
(3)G104
(4)G107
(5)S118
(6)C119
Figure 12:

Engine, Left Rear
Object Number: 321351 Size: LF
(1)Engine Coolant Temperature (ECT) Sensor
(2)Variable Effort Steering Actuator
(3)S127
Figure 13:

Engine, Right Rear
Object Number: 749575 Size: LF
(1)S223
(2)S222
Figure 14:

Engine, Right Rear
Object Number: 802456 Size: LF
(1)Camshaft Position (CMP) Sensor
(2)C110
(3)Vehicle Speed Sensor
(4)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
(5)C131
Figure 15:

Wheel Speed Sensor (WSS) - Front, Under the Left Front of the Vehicle, Above the Front Axle
Object Number: 802454 Size: LF
(1) Wheel Speed Sensor (WSS) - LF (RF Similar)
(2)C111
Figure 16:

Passenger Compartment, Behind the Instrument Panel Cluster
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 17:

Instrument Panel Cluster, Below the Upper Pad
Object Number: 321366 Size: LF
(1)S207
(2)S210
(3)S206
(4)Instrument Panel Cluster (IPC)
Figure 18:

Instrument Panel Cluster, Below the Left Side
Object Number: 321367 Size: LF
(1)G203 (Hidden)
(2)S200
(3)S202
(4)G204
(5)S201
(6)S205
Figure 19:

Instrument Panel Cluster (IPC), at the Base of the Steering Column
Object Number: 794505 Size: LF
(1)Steering Column Fuse Holder
(2)Steering Column
(3)P101
(4)Steering Wheel Postion Sensor
(5)C202
(6)C206
Figure 20:

Instrument Panel Cluster, Below the Steering Column
Object Number: 321377 Size: LF
(1)S225
(2)S226
(3)Brake Pedal
(4)Stoplamp/AT Shift Lock Control Switch
(5)Stoplamp Switch
(6)Steering Column Support Bracket
Figure 21:

Instrument Panel Cluster, Below the Right Side
Object Number: 321382 Size: LF
(1)C201
(2)S221
(3)C205
(4)HVAC Control Processor
Figure 22:

Instrument Panel Cluster, Beneath the Right Side
Object Number: 605470 Size: LF
(1)P100
(2)Vacuum Control Assembly
(3)S212
(4)S211
(5)C205
(6)S223
(7)S222
Figure 23:

Instrument Panel Cluster, Below the Right Side
Object Number: 321386 Size: LF
(1)G201
(2)S323
(3)G205
Figure 24:

Headliner, Top
Object Number: 805987 Size: LF
(1)Headliner
(2)S341
(3)S342
(4)S338
(5)S339
(6)S366
(7)S337
(8)S340
Figure 25:

Passenger Compartment, in the Center Front of the Headliner
Object Number: 321390 Size: LF
(1)Sunroof Module
(2)Sunroof Motor
(3)C360
Figure 26:

Passenger Compartment, Below the Center Console
Object Number: 321393 Size: LF
(1)S346
(2)S343
(3)S345
(4)S347
(5)S344
Figure 27:

Passenger Compartment, Behind the Lower Left Front Trim
Object Number: 321395 Size: LF
(1)Retained Accessory Power (RAP) 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 28:

Passenger Compartment, Below the Left Front Seat
Object Number: 321396 Size: LF
(1)S313
(2)G302
(3)S314
(4)S312
(5)S311
(6)C345
(7)C305
(8)C316 (LH), C317 (RH)
Figure 29:

Passenger Compartment, Below the RH 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 30:

Passenger Compartment, Below the Left Front Seat
Object Number: 321397 Size: LF
(1)Infatable Restraint Sensing and Diagnostic Module (SDM)
(2)G306
Figure 31:

Passenger Compartment, Left Front Seat
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 (Left) C303 (Right)
(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 32:

Front View of Seat
Object Number: 321400 Size: LF
(1)Seat Lumbar Vertical Up/Down Motor - Driver and Front Passenger
(2)Lumbar Horizontal In/Out Motor - Driver and Front Passenger
Figure 33:

Driver Seat Underside
Object Number: 722727 Size: LF
(1)Seat Horizontal Motor - Driver
(2)Memory Seat Module (MSM)
(3)Lumbar Horizontal Position Sensor - Driver
(4)Seat Front Vertical Position Sensor
(5)Seat Rear Vertical Position Sensor
(6)Seat Rear Vertical Motor - Driver
(7)Seat Front Vertical Motor - Driver
Figure 34:

Front Passenger Seat Underside
Object Number: 701413 Size: LF
(1)Seat Lumbar Horizontal Relay - Front Passenger
(2)Seat Recline Motor - Front Passenger
(3)Seat Rear Vertical Motor - Front Passenger
(4)Heated Seat Module - Front Passenger
(5)Seat Lumbar Vertical Relay - Front Passenger
(6)Seat Front Vertical Motor - Front Passenger
(7)Seat Horizontal Motor - Front Passenger
Figure 35:

Passenger Compartment, in the Right Rear
Object Number: 778802 Size: LF
(1)Rear Cross Car Breakout
(2)S327
(3)S360
(4)S432
(5)S434
(6)C401
(7)S328
(8)S329
Figure 36:

Passenger Compartment, on the Left Sail Panel
Object Number: 321409 Size: LF
(1)C315
(2)C313
Figure 37:

Passenger Compartment, on the Right Sail Panel
Object Number: 321411 Size: LF
(1)Seat Belt Retractor Actuator - Right (LH Similar)
(2)C314
Figure 38:

Passenger Compartment, Behind the Rear Seat
Object Number: 238886 Size: LF
(1)Continuously Variable Road Sensing Suspension (CVRSS) Module
(2)Remote Control Door Lock Receiver (RCDLR)
(3)Radio Interface Module (RIM)
(4)Relay Block - Rear #1
(5)Relay Block - Rear #2
(6)Fuse Block - Rear
(7)Body Control Module (BCM)
(8)S410
(9)Relay Block - Rear #3
(10)Relay Block - Rear #4
(11)S430
(12)Automatic Level Control (ALC) Fuse Block-in the Harness
(13)P400
(14)S431
(15)Door Lock Relay
(16)Relay Block - Rear #5
(17)G403
Figure 39:

Passenger Compartment, Left Side Behind the Seats and Carpet
Object Number: 805980 Size: LF
(1)S300
(2)S301
(3)S302
(4)S303
(5)S304
(6)S305
(7)S306
(8)S307
(9)S308
(10)S406
(11)Rear Cross Car Breakout Harness
Figure 40:

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
(9)S404
(10)S408
(11)S409
Figure 41:

Rear Compartment, in the Left Side
Object Number: 749577 Size: LF
(1)S414
(2)S403
(3)S411
(4)S412
(5)S415
(6)S416
(7)S418
(8)S417
(9)Fuel Door Release Actuator
(10)Harness to the Rear Compartment Lid
Figure 42:

Rear Compartment, at the Rear
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 Pulldown Motor
Figure 43:

Rear Compartment, Behind Rear Seat Back (w/UE1)
Object Number: 658821 Size: LF
(1)C345
(1)C345
(2)Vehicle Communications Unit (VCU) and Vehicle Interface Unit (VIU)
(3)Module Board
(4)Onstar GPS Antenna Lead
(5)S361
(6)S360
(7)Onstar Cellular Antenna Lead
Figure 44:

Rear Compartment Lid Harness
Object Number: 801060 Size: LF
(1)C408
(2)S429
(3)S425
(4)P405
(5)License Lamp
(6)Right Backup Lamp (Hidden)
(7)Left Backup Lamp
(8)License Lamp
Figure 45:

Rear of the Vehicle, Below the Passenger Compartment
Object Number: 321436 Size: MF
(1)Suspension Postion Sensor - RR
(2)Strut Actuator Connector - RR
(3)C412
(4)Strut Actuator Connector - LR
(5)Suspension Postion Sensor - LR
Figure 46:

Below the Right Rear of the Vehicle
Object Number: 321440 Size: LF
(1)C415
(2)Automatic Level Control (ALC) Compressor
(3)Wheel Speed Sensor (WSS) - RR (LR Similar)