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

Behind the Front Grille, at the Center of the Radiator Core Support


Object Number: 524983  Size: LF
(1)Hood Ajar Switch
(2)Night Vision Camera
(3)Ambient Outside Air Temperature Sensor
Figure 2:

Passenger Compartment, Top Left of the Instrument Panel


Object Number: 524986  Size: LF
(1)Head-Up Display
(2)S201
(3)Head-Up Display Connector
Figure 3:

Lower Left Side of the Instrument Panel


Object Number: 594426  Size: LF
(1)Head-Up Display (HUD) Control