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

Data Link Connector Power and Ground, 1 of 2


Object Number: 1816934  Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Data Link Connector Power and Ground, 2 of 2 - LG4/LG5
CHMSL, PWR POST, and RDO/CHIME Fuses/Circuit Breakers
CHMSL, PWR POST, and RDO/CHIME Fuses/Circuit Breakers
Data Link Connector Power and Ground, 2 of 2 - LG4/LG5
CAN Connector Power and Ground - L18 w/JE4, LG4, LG5
CAN Connector Power and Ground - L18 w/JE4, LG4, LG5
Data Link Connector Power and Ground, 2 of 2 - LG4/LG5
Computer/Integrating Systems Schematic Icons
G101 - 1 of 2
G119 and G120
Figure 2:

Data Link Connector Power and Ground, 2 of 2 - LG4, LG5


Object Number: 1816936  Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Splice Pack SP203
Data Link Connector Power and Ground, 1 of 2
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Data Link Connector Power and Ground, 1 of 2
Data Link Connector Power and Ground, 1 of 2
Figure 3:

Splice Pack SP203


Object Number: 1645674  Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
High Speed GMLAN - LLY/L18
Data Link Connector Power and Ground, 2 of 2 - LG4/LG5
Computer/Integrating Systems Schematic Icons
Serial Data Gateway (SDG) Module - L18 w/JE4, LG4, LG5
Figure 4:

High Speed GMLAN - LLY/L18


Object Number: 1645683  Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Computer/Integrating Systems Schematic Icons
CAN Connector Power and Ground - L18 w/JE4, LG4, LG5
Splice Pack SP203
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Figure 5:

CAN Connector Power and Ground - L18 w/JE4, LG4, LG5


Object Number: 1817746  Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
Serial Data Gateway (SDG) Module - L18 w/JE4, LG4, LG5
High Speed GMLAN - LLY/L18
CHMSL, PWR POST, and RDO/CHIME Fuses/Circuit Breakers
CHMSL, PWR POST, and RDO/CHIME Fuses/Circuit Breakers
Data Link Connector Power and Ground, 1 of 2
Data Link Connector Power and Ground, 1 of 2
G101 - 1 of 2
J1939 Serial Data, 1 of 2 - L18 w/JE4, LG4, LG5
J1939 Serial Data, 1 of 2 - L18 w/JE4, LG4, LG5
Figure 6:

Serial Data Gateway (SDG) - L18 w/JE4, LG4, LG5


Object Number: 1817751  Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
J1939 Serial Data, 1 of 2 - L18 w/JE4, LG4, LG5
CAN Connector Power and Ground - L18 w/JE4, LG4, LG5
Batteries - LG4/LG5 and B+ Bus
A/C COMP, HTD FUEL, PCM-B, and RR DEFOG Fuses
TRANS Fuse/Circuit Breaker
J1939 Serial Data, 1 of 2 - L18 w/JE4, LG4, LG5
J1939 Serial Data, 1 of 2 - L18 w/JE4, LG4, LG5
G103, G105, and G106
Splice Pack SP203
Figure 7:

J1939 Serial Data 1 of 2 - L18 w/JE4, LG4, LG5


Object Number: 1817758  Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
J1939 Serial Data, 2 of 2 - L18 w/JE4, LG4, LG5
Serial Data Gateway (SDG) Module - L18 w/JE4, LG4, LG5
CAN Connector Power and Ground - L18 w/JE4, LG4, LG5
CAN Connector Power and Ground - L18 w/JE4, LG4, LG5
J1939 Serial Data, 2 of 2 - L18 w/JE4, LG4, LG5
Serial Data Gateway (SDG) Module - L18 w/JE4, LG4, LG5
Serial Data Gateway (SDG) Module - L18 w/JE4, LG4, LG5
J1939 Serial Data, 2 of 2 - L18 w/JE4, LG4, LG5
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Figure 8:

J1939 Serial Data, 2 of 2 - L18 w/JE4, LG4, LG5


Object Number: 1645689  Size: FS
Master Electrical Component List
Data Link Communications Description and Operation
J1939 Serial Data, 1 of 2 - L18 w/JE4, LG4, LG5
J1939 Serial Data, 1 of 2 - L18 w/JE4, LG4, LG5
J1939 Serial Data, 1 of 2 - L18 w/JE4, LG4, LG5
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons
Computer/Integrating Systems Schematic Icons