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

Interior Lamp Relay


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

Door Jamb Switches


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

LH Courtesy Lamps


Object Number: 397832  Size: FS
Interior Lamp Relay
Courtesy/Reading Lamps and Vanity Mirrors
ABS and PCM BATT Fuses (Underhood Fuse Block)
Handling ESD Sensitive Parts Notice
G401 (1 of 2)
RH Courtesy Lamps
Lighting Systems Components
Courtesy/Reading Lamps and Vanity Mirrors
Interior Lights Circuit Description
RH Courtesy Lamps
Door Jamb Switches
Figure 4:

RH Courtesy Lamps


Object Number: 397829  Size: FS
Interior Lamp Relay
G201
G201
LH Courtesy Lamps
Handling ESD Sensitive Parts Notice
Lighting Systems Components
Interior Lights Circuit Description
Courtesy/Reading Lamps and Vanity Mirrors
LH Courtesy Lamps
Figure 5:

Courtesy/Reading Lamps and Vanity Mirrors


Object Number: 397833  Size: FS
LH Courtesy Lamps
LH Courtesy Lamps
G402
Lighting Systems Components
Interior Lights Circuit Description
RH Courtesy Lamps