GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Impala 🢒 Body Systems 🢒 Lighting 🢒 Interior Lights Dimming Schematics
Figure 1:

Headlamp Switch, Instrument Panel Cluster (IPC), and Doors
Object Number: 1888402 Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Control Module References
Radio, HVAC Control Module, Driver Information Center (DIC) Switch, and Steering Wheel Controls
Fuse Block - Underhood Bussing
ONSTAR, INT LTS/PNL DIM, LT T/SIG, RT T/SIG, CHMSL/BCK-UP, INT LIGHTS, RVC SEN, and ECM/TCM Fuses
G301
G301
G301
G302
G202, and G204
G201
G301
G302
Figure 2:

Radio, HVAC Control Module, Driver Information Center (DIC) Switch, and Steering Wheel Controls
Object Number: 1888404 Size: FS
Master Electrical Component List
Interior Lighting Systems Description and Operation
Control Module References
Headlamp Switch, Instrument Panel Cluster (IPC) and Doors
Fuse Block - Underhood Bussing
ONSTAR, INT LTS/PNL DIM, LT T/SIG, RT T/SIG, CHMSL/BCK-UP, INT LIGHTS, RVC SEN, and ECM/TCM Fuses
Master Electrical Schematic Icons
G201
G202, and G204
G201