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

Data Link Connector OBD 2


Object Number: 626177  Size: FS
Data Link Communications Components
Data Link Connector (Under Hood)
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
SIR Caution
Cell 14: G106, continued
Cell 14: G105 and G106
Cell 14: G204 and SP256
Cell 10: RR W/W, DRL, HIGH BEAM, and LDLEV Fuses
Figure 2:

Data Link Connector (Under Hood)


Object Number: 626178  Size: FS
Data Link Communications Components
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
SIR Caution
Ignition Switch, IGN Fuse, and ST Fuse
Alt-S, AM2, Dome, EFI, Hazard, Horn, and Main Fuses
Cell 14: SP254 and SP261
Cell 14: SP254 and SP261
Cell 14: Battery, G100, G101, G102, G103, and G104
Cell 20: Power and Ground
Data Link Connector OBD 2