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

Interior Lamp Relay


Object Number: 397776  Size: FS
Lighting Systems Components
Interior Lights Circuit Description
Door Jamb Switches
Handling ESD Sensitive Parts Notice
Cell 114: LH Courtesy Lamps
RH Courtesy Lamps
Figure 2:

Door Jamb Switches


Object Number: 397807  Size: FS
Lighting Systems Components
Interior Lights Circuit Description
Cell 114: LH Courtesy Lamps
Interior Lamp Relay
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Serial Data Class 2
Simple Bus Interface
Figure 3:

Cell 114: LH Courtesy Lamps


Object Number: 397782  Size: FS
Lighting Systems Components
Interior Lights Circuit Description
RH Courtesy Lamps
Door Jamb Switches
Handling ESD Sensitive Parts Notice
Interior Lamp Relay
Rear Courtesy/Reading Lamps, and Vanity Mirrors
Battery Voltage to the Rear Fuse Block
ABS and PCM BATT Fuses (Underhood Fuse Block)
G401 (1 of 2)
RH Courtesy Lamps
Figure 4:

RH Courtesy Lamps


Object Number: 397780  Size: FS
Lighting Systems Components
Interior Lights Circuit Description
Rear Courtesy/Reading Lamps, and Vanity Mirrors
Cell 114: LH Courtesy Lamps
Interior Lamp Relay
G201 (1 of 3)
G201 (1 of 3)
Rear Courtesy/Reading Lamps, and Vanity Mirrors
Cell 114: LH Courtesy Lamps
Figure 5:

Rear Courtesy/Reading Lamps, and Vanity Mirrors


Object Number: 397786  Size: FS
Lighting Systems Components
Interior Lights Circuit Description
RH Courtesy Lamps
Cell 114: LH Courtesy Lamps
RH Courtesy Lamps
G402
G402