GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Negative Battery Cable


Object Number: 204733  Size: SH
Figure 2:

Positive Battery Cable


Object Number: 215049  Size: SH
Figure 3:

Low Coolant Switch


Object Number: 215024  Size: SH
Figure 4:

Turn Signal Harness, Left Front View


Object Number: 628188  Size: LF
(1)C107 (4 Cavities)
(2)Front Chassis Harness
(3)C105 (5 Cavities)
(4)Turn Signal Harness
(5)High A Note - Horn
(6)Park and Turn Signal Lamp - LF
(7)Park and Turn Signal Lamp Connector
Figure 5:

Turn Signal Harness, Right Side


Object Number: 635532  Size: LF
(1)Right Front Park and Turn Signal Lamp
(2)A/C Pressure Cut Off Switch
(3)A/C Condenser
Figure 6:

Front Chassis Harness (JE3


Object Number: 635543  Size: LF
(1)C105
(2)G105
(3)G105
(4)C107
(5)Condenser Fan Connector
Figure 7:

Front Chassis Harness (JE5


Object Number: 635546  Size: LF
(1)C105
(2)G105
(3)G105
(4)C107
(5)Condenser Fan Connector
Figure 8:

Front Chassis Harness to Brake Components (JE3)


Object Number: 231487  Size: LF
(1)Brake Fluid Flow Switch
(2)Electronic Brake Control Module (EBCM) (JE3) Connecor C2 (2 cavities)
(3)Electronic Brake Control Module (EBCM) (JE3) Connector C1 (24 cavities)
(4)Electronic Brake Control Module (EBCM) (JE3)
Figure 9:

Front Chassis Harness to Brake Components


Object Number: 231480  Size: LF
(1)Power Brake Booster Pump (JE3)
(2)Power Brake Booster Pump Motor (JE3)
(3)Brake Fluid Level Switch (JE3)
Figure 10:

Front Chassis Harness to Brake Components


Object Number: 231739  Size: LF
(1)Brake Pressure Modulator Valve (BPMV), Right Side Front
(2)BPMV, Left Side Front
Figure 11:

Front Chassis Harness, Center (LG4


Object Number: 635548  Size: LF
(1)C116 (8 Cavities)
(2)C118 (2 Cavities)
(3)Left Frame Rail
Figure 12:

Cover to Cab Interface Removal


Object Number: 216373  Size: LF
Figure 13:

Front Chassis Harness to Cab


Object Number: 628181  Size: LF
(1)C204 (3 Cavities)
(2)C206 (2 Cavities)
(3)C202 (56 Cavities)
(4)Cab Interface Connector Housing
(5)C205 (1 Cavity) (LG4 Only)
(6)C207 (1 Cavity) (LG4 Only)
(7)P100
(8)C200 (56 Cavities)
(9)Front Chassis Harness
(10)P101
Figure 14:

Front Chassis to Harness Rear Support


Object Number: 635553  Size: LF
(1)Fuel Pump
(2)Rear Support
Figure 15:

Front Chassis Harness to Left Rear of Frame (JE3


Object Number: 628256  Size: LF
(1)Front Chassis Harness
(2)C413 (4 Cavities)
(3)Electronic Brake Control Harness (JE3)
Figure 16:

Front Chassis Harness to Electric/Hydraulic Park Brake Components


Object Number: 231707  Size: LF
(1)Park Brake Pump Motor Connector
(2)Park Brake Pressure Solenoid Valve
(3)Park Brake Pressure Sensor
(4)Park Brake Linkage Travel Switch Connector
(5)Electric/Hydraulic Park Brake Actuator
Figure 17:

Front Chassis Harness to Exhaust Brake


Object Number: 635535  Size: LF
(1)Engine Exhaust Brake Solenoid Valve
(2)Front Chassis Harness Connector
(3)Left Frame Rail at #2 Crossmember
Figure 18:

Low Air Pressure Switch


Object Number: 402098  Size: LF
(1)Low Air Pressure Switch (JE4)
Figure 19:

Manual Transmission Harness (5 or 6-Speed), Upper Left Rear View


Object Number: 628296  Size: LF
(1)Front Chassis Harness
(2)Backup Lamps Switch
(3)Vehicle Speed Sensor (VSS) (JE5)
(4)Vehicle Speed Sensor (VSS) (JE3)
(5)Manual Transmission Case
(6)Manual Transmission Harness
(7)C409
Figure 20:

Manual Transmission Harness (5 or 6-Speed), Upper Left Rear View


Object Number: 628296  Size: LF
(1)Front Chassis Harness
(2)Backup Lamps Switch
(3)Vehicle Speed Sensor (VSS) (JE5)
(4)Vehicle Speed Sensor (VSS) (JE3)
(5)Manual Transmission Case
(6)Manual Transmission Harness
(7)C409
Figure 21:

Manual Transmission Harness (9 or 10-Speed) , Upper Left Rear View


Object Number: 231666  Size: LF
(1)Backup Lamps Switch
(2)Vehicle Speed Sensor (VSS)
Figure 22:

Fuel Tank Harness, Left Side


Object Number: 231729  Size: MF
(1)Fuel Sender
(2)Fuel Tank
Figure 23:

Fuel Tank Harness to Fuel Level Controls, Left Side Front View


Object Number: 628251  Size: LF
(1)Fuel Sender and Balance Pump Control Module
(2)Fuel Sender and Balance Pump Control Module Connector
(3)Fuel Transfer Pump Relay
(4)Fuel Tank Harness to Left Side Tank
(5)Back of Cab Crossmember
Figure 24:

Fuel Tank Harness, Right Side


Object Number: 628248  Size: LF
(1)Fuel Sending Unit Connector
(2)Fuel Tank Sender (NL5)
(3)Fuel Transfer Pump Connector
(4)Fuel Transfer Pump
(5)Back of Cab Crossmember
(6)Fuel Tank Harness to Left Side Fuel Tank
(7)C411
(8)Rear Chassis Harness
Figure 25:

Electronic Brake Controls Harness and Components , LH View


Object Number: 231756  Size: LF
(1)RH Rear Wheel Speed Sensor (WSS) (JE4)
(2)RH Rear Gender Adapter Connector (4 male-to-male cavities) (JE4)
(3)RH Rear Brake Pressure Modulator Valve (BPMV) (JE4)
(4)LH Rear BPMV (JE4)
(5)LH Rear WSS (JE4)
(6)LH Rear Gender Adapter Connector (4 male-to-male cavities) (JE4)
Figure 26:

Electric Brake Control Harness, Rear (ABS-Air)


Object Number: 216501  Size: LF
Figure 27:

Trailer Harness, Front


Object Number: 635555  Size: LF
(1)Right Frame Rail
(2)Battery Ground Block
(3)Low Air Pressure Switch (JE4)
(4)C403
(5)C405
Figure 28:

Trailer Front Harness to Cab Bridge, Left Forward View


Object Number: 231704  Size: LF
(1)Trailer Receptacle
Figure 29:

Rear Chassis Harness and Tail Lamps, Upper Left Rear View (Typical)


Object Number: 231737  Size: LF
(1)Right Tail, Stop and Turn Signal Lamp with Backup Lamp
(2)Left Tail, Stop and Turn Signal Lamp with Backup Lamp