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

Display Power, Ground and Video Signals (U42)


Object Number: 1915187  Size: FS
Master Electrical Component List
Video Entertainment System Description and Operation (Non-Headrest DVD Systems)
Control Module References
Audio Signals (U42)
Figure 2:

Audio Signals (U42)


Object Number: 1915190  Size: FS
Master Electrical Component List
Video Entertainment System Description and Operation (Non-Headrest DVD Systems)
Control Module References
Dual DVD Headrest System (AYE)
Display Power, Ground and Video Signals (U42)
Figure 3:

Dual DVD Headrest System (AYE)


Object Number: 2193348  Size: FS
Master Electrical Component List
Video Entertainment System Description and Operation (Non-Headrest DVD Systems)
Control Module References
Audio Signals (U42)