GM Service Manual Online
For 1990-2009 cars only

Power, Ground, MIL and DLC

Power, Ground, MIL and DLC


Object Number: 789643  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Ignition Controls
OBD II Symbol Description Notice
Battery, Auxiliary Battery, and Underhood Fuse/Relay Center
Ignition A, Ignition B Fuses, and Ignition Switch
ECM B, Horn, and A/C Fuses
ECM 1 and Ignition E Fuses (4.3L)
G101 (Gasoline Engines)
Ignition A, Ignition B Fuses, and Ignition Switch
Data Link Communications
Gauges Fuse
Indicators 1 of 2 (Diesel)