GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Headlights/Daytime Running Lights (DRL) Schematics
Figure 1:

Cell 102: Daytime Running Lights (DRL) Diode Module, Headlamps Dimmer Switch, Daytime Running Lights (DRL) Control Module
Object Number: 302393 Size: FS
Lighting Systems Components Headlights: Daytime Running Li
Headlights/Daytime Running Lights (DRL) Circuit Description
Cell 102: G102, Headlamps and Park Brake Switch
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Cell 102: G102, Headlamps and Park Brake Switch
Cell 102: G102, Headlamps and Park Brake Switch
Cell 102: G102, Headlamps and Park Brake Switch
Cell 102: G102, Headlamps and Park Brake Switch
Cell 102: G102, Headlamps and Park Brake Switch
Cell 102: G102, Headlamps and Park Brake Switch
Figure 2:

Cell 102: G102, Headlamps and Park Brake Switch
Object Number: 386637 Size: FS
Lighting Systems Components Headlights: Daytime Running Li
Headlights/Daytime Running Lights (DRL) Circuit Description
Cell 102: Daytime Running Lights (DRL) Diode Module, Headlamps Dimmer SwItch, Daytime Running Lights (DRL) Control Module