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

Cell 23: PWR, GND and DLC


Object Number: 338434  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Cell 23: Ignition Controls
OBD II Symbol Description Notice
VCM Connector End Views
Cell 10: HTD MIR, HAZARD, PWR ACCY, STOP, PWR AUX, CIG LTR, RADIO-B, CTSY, PARK LPS, DRL, SECURITY STRG, ILLUM Fuses
Cell 10: FUEL SOL, IGN-E, ECM-I, ENG-I, GAUGES, AIR BAGS, TURN B/U Fuses
Cell 10: Ignition Switch, RR BLOWER, RR HVAC, BRAKE, HTR AC, CRUISE, RADIO, WIPER, PWR WDO, TRANS, CRANK Fuses
Cell 10: FUEL SOL, IGN-E, ECM-I, ENG-I, GAUGES, AIR BAGS, TURN B/U Fuses
Cell 10: Battery, AUX A, AUX B, BLOWER, IGN-B, IGN-A, ABS, BATT, LIGHTING, ECM-B, HORN, and A/C Fuses, Inline Fuse 30 A (Gasoline Engines)
Cell 11: ECM-B, HORN, A/C Fuses
Cell 11: ENG-I Fuse (6.5L) and ECM-I Fuse (7.4L)
Cell 11: CRANK, CRUISE, HTR-A/C, BRAKE Fuses
Cell 11: GAUGES Fuse
Cell 11: STOP, PWR AUX, CIG LTR, RADIO-B, HTD MIR, HAZARD Fuses
Cell 14: G103 (7.4L)
Cell 14: G201
Cell 14: G103 (7.4L)
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 2:

Cell 23: Ignition Controls


Object Number: 338597  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Cell 23: Fuel Pump Controls
Cell 23: PWR, GND and DLC
OBD II Symbol Description Notice
Cell 10: Battery, AUX A, AUX B, BLOWER, IGN-B, IGN-A, ABS, BATT, LIGHTING, ECM-B, HORN, and A/C Fuses, Inline Fuse 30 A (Gasoline Engines)
Cell 11: ECM-B, HORN, A/C Fuses
VCM Connector End Views
Cell 14: G103 (7.4L)
Handling ESD Sensitive Parts Notice
Figure 3:

Cell 23: Fuel Pump Controls


Object Number: 338598  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Cell 23: Fuel Injector Controls
Cell 23: Ignition Controls
OBD II Symbol Description Notice
Cell 10: Battery, AUX A, AUX B, BLOWER, IGN-B, IGN-A, ABS, BATT, LIGHTING, ECM-B, HORN, and A/C Fuses, Inline Fuse 30 A (Gasoline Engines)
Cell 11: ECM-B, HORN, A/C Fuses
Cell 14: G103 (7.4L)
Cell 23: Sensor Controls
VCM Connector End Views
Handling ESD Sensitive Parts Notice
Figure 4:

Cell 23: Fuel Injector Controls


Object Number: 338599  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Cell 23: Sensor Controls
Cell 23: Fuel Pump Controls
OBD II Symbol Description Notice
Cell 10: FUEL SOL, IGN-E, ECM-I, ENG-I, GAUGES, AIR BAGS, TURN B/U Fuses
Cell 11: ENG-I Fuse (6.5L) and ECM-I Fuse (7.4L)
VCM Connector End Views
Handling ESD Sensitive Parts Notice
Figure 5:

Cell 23: Sensor Controls


Object Number: 338600  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Cell 23: EGR and EVAP Controls
Cell 23: Fuel Injector Controls
OBD II Symbol Description Notice
VCM Connector End Views
Cell 23: EGR and EVAP Controls
Cell 23: EGR and EVAP Controls
Cell 23: 4L80-E Transmission Switch Controls
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 6:

Cell 23: EGR and EVAP Controls


Object Number: 338601  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Cell 23: Oxygen Sensor Controls
Cell 23: Sensor Controls
OBD II Symbol Description Notice
Cell 10: FUEL SOL, IGN-E, ECM-I, ENG-I, GAUGES, AIR BAGS, TURN B/U Fuses
Cell 11: ENG-I Fuse (7.4L)
Cell 14: G103 (7.4L)
VCM Connector End Views
Cell 23: Sensor Controls
Cell 23: Sensor Controls
Handling ESD Sensitive Parts Notice
Figure 7:

Cell 23: Oxygen Sensor Controls


Object Number: 338604  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Cell 23: Vehicle Speed Sensor and Cruise Control
Cell 23: EGR and EVAP Controls
OBD II Symbol Description Notice
Cell 10: FUEL SOL, IGN-E, ECM-I, ENG-I, GAUGES, AIR BAGS, TURN B/U Fuses
Cell 11: ENG-I Fuse (7.4L)
Cell 11: ENG-I Fuse (7.4L)
Cell 14: S101 (G103) (7.4L)
Cell 14: G103 (7.4L)
VCM Connector End Views
Handling ESD Sensitive Parts Notice
Figure 8:

Cell 23: Vehicle Speed Sensor and Cruise Control


Object Number: 337162  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Cell 23: Secondary AIR Controls
Cell 23: Oxygen Sensor Controls
OBD II Symbol Description Notice
VCM Connector End Views
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic Icons
Figure 9:

Cell 23: Secondary AIR Controls


Object Number: 338606  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Cell 23: 4L80-E Transmission Solenoid Controls
Cell 23: Oxygen Sensor Controls
OBD II Symbol Description Notice
Cell 10: FUEL SOL, IGN-E, ECM-I, ENG-I, GAUGES, AIR BAGS, TURN B/U Fuses
Cell 11: ENG-I Fuse (7.4L)
Cell 14: G103 (7.4L)
VCM Connector End Views
Handling ESD Sensitive Parts Notice
Figure 10:

Cell 23: 4L80-E Transmission Solenoid Controls


Object Number: 337168  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Cell 23: 4L80-E Transmission Switch Controls
Cell 23: Secondary AIR Controls
OBD II Symbol Description Notice
Cell 10: Ignition Switch, RR BLOWER, RR HVAC, BRAKE, HTR AC, CRUISE, RADIO, WIPER, PWR WDO, TRANS, CRANK Fuses
Cell 10: Ignition Switch, RR BLOWER, RR HVAC, BRAKE, HTR AC, CRUISE, RADIO, WIPER, PWR WDO, TRANS, CRANK Fuses
Cell 11: CRANK, CRUISE, HTR-A/C, BRAKE Fuses
Cell 11: TURN B/U and TRANS Fuses
Cell 34: Gasoline Engine
Cell 44: IP, VCM, EBCM, and VSS
VCM Connector End Views
Handling ESD Sensitive Parts Notice
Figure 11:

Cell 23: 4L80-E Transmission Switch Controls


Object Number: 337169  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Cell 23: A/C Controls
Cell 23: 4L80-E Transmission Solenoid Controls
OBD II Symbol Description Notice
VCM Connector End Views
Cell 23: Sensor Controls
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic Icons
Figure 12:

Cell 23: A/C Controls


Object Number: 338609  Size: FS
Engine Controls Components
Information Sensors/Switches Description
Cell 23: 4L80-E Transmission Switch Controls
Cell 10: Ignition Switch, RR BLOWER, RR HVAC, BRAKE, HTR AC, CRUISE, RADIO, WIPER, PWR WDO, TRANS, CRANK Fuses
Cell 10: FUEL SOL, IGN-E, ECM-I, ENG-I, GAUGES, AIR BAGS, TURN B/U Fuses
Cell 10: Battery, AUX A, AUX B, BLOWER, IGN-B, IGN-A, ABS, BATT, LIGHTING, ECM-B, HORN, and A/C Fuses, Inline Fuse 30 A (Gasoline Engines)
Cell 11: CRANK, CRUISE, HTR-A/C, BRAKE Fuses
Cell 14: G103 (7.4L)
Cell 14: G103 (7.4L)
Cell 14: G201
VCM Connector End Views
Handling ESD Sensitive Parts Notice