GM Service Manual Online
For 1990-2009 cars only

Reference on Schematic

Section Number - Subsection Name

Brake Transaxle Shift Interlock (BTSI) Cell 138

7 - Automatic Transaxle 4T80-E

Data Link Connector (DLC) Cell 50

8 - Wiring Systems

Ground Distribution Cell 14

8 - Wiring Systems

Interior Lights Dimming Cell 117

8 - Lighting Systems

Power Distribution Cell 10

8 - Wiring Systems