GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 CTS 🢒 Body 🢒 Wiring Systems 🢒 Harness Routing Views
Figure 1:

Splice Pack and Pass-Through Locations
Object Number: 1365867 Size: LF
(1)SP102 (LA3/LY7/LY9)
(2)Pass-Through Grommet from Engine Compartment to Passenger Compartment
(3)Pass-Through Grommet from Passenger Compartment to Right Front Door
(4)Pass-Through Grommet from Passenger Compartment to Right Rear Door
(5)SP303
(6)Pass-Through Grommet from Rear Compartment to Rght Rear Underbody
(7)Pass-Through Grommet from Rear Compartment to Left Rear Underbody
(8)Pass-Through Grommet from Passenger Compartment to Left Rear Door
(9)SP300
(10)Pass-Through Grommet from Passenger Compartment to Left Front Door
(11)Pass-Through Grommet from Engine Compartment to Passenger Compartment
(12)SP200
Figure 2:

Front End Lighting Harness Routing - LF of the Vehicle
Object Number: 1347682 Size: LF
(1)Marker Lamp - LF Connector
(2)Headlamp - Left Connector
(3)C108
Figure 3:

Front End Lighting Harness Routing - RF of the Vehicle
Object Number: 1347680 Size: LF
(1)C109
(2)Headlamp - Right Connector
(3)Marker Lamp - RF Connector
Figure 4:

Lower Left of the Engine Compartment
Object Number: 804233 Size: LF
(1)G101
(2)C105 (V8)
(3)C104 (V6) or C107 (V8)
(4)Wiring Harness Pass-through Grommet
Figure 5:

Lower Right of the Engine Compartment
Object Number: 804240 Size: LF
(1)C103
(2)S204
(3)Underhood Fuse Block C4
Figure 6:

Battery and Fuse Blocks
Object Number: 1367736 Size: LF
(1)Fuse Block - Underhood
(2)Battery Positive Cable Connection to Fuse Block - Underhood
(3)Ground G105 (LHD)
(4)Battery Positive Cable (LHD)
(5)Battery (LHD)
(6)Battery Negative Cable (LHD)
(7)C103 (LHD)
(8)Fuse Block - Right Rear
(9)Fuse Block - Left Rear
(10)Battery (RHD)
(11)Battery Negative Cable (RHD)
(12)Ground G105 (RHD)
(13)C103 (RHD)
(14)Battery Positive Cable (RHD)
Figure 7:

Right Front Side of the Engine Compartment, C101, C102 (LS6)
Object Number: 1372926 Size: LF
(1)Fuse Block - Underhood Connector C2
(2)Fuse Block - Underhood Connector C3
(3)Throttle Actuator Control (TAC) Module Connector C1
(4)C101
(5)C102
(6)Throttle Actuator Control (TAC) Module
(7)Throttle Actuator Control (TAC) Module Connector C2
(8)Splice Pack SP102
(9)Fuse Block - Underhood Connector C5
(10)Fuse Block - Underhood Connector C1
(11)Fuse Block - Underhood Connector C4
Figure 8:

Left Side of the Engine Compartment - 5.7L (LS6)
Object Number: 1372936 Size: LF
(1)A/C Refrigerent Pressure Sensor
(2)A/C Refrigerent Pressure Sensor Connector
(3)C107
(4)C105
Figure 9:

I/P Harness 1 of 2
Object Number: 1365997 Size: LF
(1)Inflatable Restraint I/P Module Connectors
(2)C201
(3)C304
(4)C203
(5)G200
(6)C200
Figure 10:

I/P Harness 2 of 2
Object Number: 804254 Size: LF
(1)C203
(2)C202
Figure 11:

Passenger Compartment - Under Left Side of I/P
Object Number: 804268 Size: LF
(1)C200
(2)C500 Pass-through Location Hole
(3)C500
(4)G200
(5)C203
Figure 12:

Passenger Compartment - Under Right Side of I/P
Object Number: 804267 Size: LF
(1)Pass-through Grommet
(2)C600 Pass-through Location Hole
(3)C201
(4)Inflatable Restraint I/P Module (Harness Side)
(5)G201
(6)C600
Figure 13:

Body Harness 1 of 2
Object Number: 1366194 Size: LF
(1)Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
(2)Rear Integration Module (RIM) Connectors
(3)Rear Defogger Connector
(4)Digital Radio Receiver Connector (Domestic w/U2K/U2L) or TV Antenna Module Connector (Export w/U2Y/U2X)
(5)Traffic Information Receiver Connector (Export w/U2X)
(6)Inflatable Restraint Roof Rail Module - Driver Connector
(7)C305
(8)C308
(9)C300
(10)C301
(11)C200
(12)C303
(13)C312
(14)G201
(15)C201
(16)C306
(17)C307
(18)Shift Control Assembly Connector (M82)
Figure 14:

Body Harness 2 of 2
Object Number: 1366356 Size: LF
(1)Fuse Block - Right Rear
(2)Inflatable Restraint Roof Rail Module - Passenger Connector
(3)C311
(4)Fuse Block - Left Rear
(5)C700
(6)SP300
(7)G307
(8)C500
(9)G200
(10)G306
(11)G201
(12)C600
(13)C800
Figure 15:

Headliner Harness
Object Number: 1366499 Size: LF
(1)C309
(2)C311
(3)Radio Antenna COAX Connector
(4)Dome Lamp Connector
(5)Intrusion Sensor Connector (Export w/UA2)
(6)Radio Antenna Module Connector
(7)C305
(8)C308
(9)Sunshade - Driver (LHD ) or Sunshade - Passenger (RHD)
(10)Speaker - Left A-Pillar Tweeter
(11)Inside Rearview Mirror (ISRVM) Connector
(12)Overhead Console Connector
(13)Noise Compensation Microphone Connector
(14)Speaker - Right A-Pillar Tweeter
(15)Radio Antenna COAX Connector
(16)Radio Antenna COAX Ground Connector (Early Production)
(17)Sunroof Control Switch Connector
(18)Sunshade - Passenger (LHD) or Sunshade - Driver (RHD)
(19)Radio Antenna COAX Connector
Figure 16:

Passenger Compartment - Under Driver Seat
Object Number: 1366541 Size: LF
(1)C312 (LHD Shown, RHD Similar)
(2)C300 (LHD Shown, RHD Similar)
(3)C301 (LHD Shown, RHD Similar)
(4)C303 (LHD Shown, RHD Similar)
Figure 17:

Passenger Compartment - Between Left Doors
Object Number: 1366518 Size: LF
(1)B - Pillar Left
(2)SP300
(3)G307
(4)C301
(5)C300
Figure 18:

Passenger Compartment - Under Center Console
Object Number: 1368986 Size: LF
(1)Shift Control Assembly Connector
(2)Body Harness Ground G306
(3)Yaw Rate and Lateral Acceleration Sensor Connector
(4)Yaw Rate and Lateral Acceleration Sensor
(5)Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
(6)Inflatable Restraint Sensing and Diagnostic Module (SDM)
Figure 19:

Passenger Compartment - Behind Front Seats
Object Number: 804271 Size: LF
(1)Splice Pack SP303
(2)Fuse Block - Right Rear
(3)Fuse Block - Left Rear
(4)G306 (Hidden)
(5)Inflatable Restraint Sensing and Diagnostic Module (SDM)
Figure 20:

Passenger Compartment - Between Right Doors
Object Number: 1366523 Size: LF
(1)Right B - Pillar
(2)C307
(3)C306
Figure 21:

Door Components
Object Number: 1366526 Size: LF
(1)Right Rear Door Module (RRDM) Connectors, LRDM Similar
(2)C801
(3)Door Latch Assembly - Right Rear Connector, Left Rear Similar
(4)C800
(5)Pass-through Grommet
(6)Window Motor - Front Passenger Connector, Driver Similar
(7)Door Latch Assembly - Front Passenger Connector, Driver Similar
(8)C601
(9)Front Passenger Door Module (FPDM) Connectors, DDM Similar (LHD Shown, RHD Similar)
(10)Right Front Door Pass-through Grommet, Left Similar
(11)C600
Figure 22:

Passenger Compartment - Left Sail Panel
Object Number: 804273 Size: LF
(1)G303
(2)C308
(3)Inflatable Restraint Roof Rail Module - Driver Connector
(4)C305
(5)Rear Defogger Connector C1
Figure 23:

Passenger Compartment - Right Sail Panel
Object Number: 1367799 Size: LF
(1)Inflatable Restraint Roof Rail Module - Passenger Connector
(2)Radio Antenna Coax Connector
(3)C311
(4)Cellular Antenna Coax Connector
(5)Cellular Antenna
(6)G303
(7)Rear Window Defogger Connector C2
(8)Rear Window Defogger Grid
(9)Splice S309
Figure 24:

Body Harness Routing - Rear Package Shelf
Object Number: 1347670 Size: LF
(1)Body Harness
(2)C322
(3)Navigation Antenna Coax Connector
(4)Navigation Antenna
(5)Speaker - Rear Subwoofer
(6)Rear Integration Module (RIM) Connector C2
(7)Rear Integration Module (RIM) Connector C1
Figure 25:

Body Harness Routing - Right Side of Rear Compartment
Object Number: 1347669 Size: LF
(1)C310
(2)C411
(3)Navigation Antenna Coax (UE1)
(4)Vehicle Communication Interface Module (VCIM) Connectors
(5)G401
(6)Inclination Sensor Connector (Export w/UA2)
Figure 26:

Rear of the Vehicle
Object Number: 803970 Size: LF
(1)C421
(2)Rear Compartment Lid
(3)Rear Compartment Lid Release Actuator Connector
(4)Rear Compartment Lid Release Actuator
(5)S400
(6)Pass-through Grommet
(7)G401
(8)G402
(9)Pass-through Grommet
Figure 27:

Rear of Vehicle - Underneath
Object Number: 1366533 Size: LF
(1)C420 (LP1/LY7) or C422 (LS6)
(2)Evaporative Emission (EVAP) Canister Vent Solenoid Valve Connector
(3)Fuel Tank Pressure Sensor Connector
(4)Fuel Pump and Sender Assembly Connector
(5)Fuel Tank Pressure Sensor Connector
(6)Fuel Pump and Sender Assembly Connector
(7)Pass-Through Grommet
(8)S400