GM Service Manual Online
For 1990-2009 cars only

Reference on Schematic

Section Number - Subsection Name

Ground Distribution Cell 14

8 - Wiring Systems

Interior Lights Dimming Cell 117

8 - Lighting Systems

Light Switch Details Cell 12

8 - Lighting Systems

Radio/Audio Systems Cell 150

8 - Entertainment

Steering Wheel Controls Cell 89

2 - Steering Wheel and Column