Cargo Lamp & Underhood Lamp
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The inadvertent power relay provides battery positive voltage to the cargo lamp and the underhood lamp. When the respective normally open switch is closed, the switch provides a ground circuit and the lamp illuminates. The cargo lamp is grounded at G203. The underhood lamp is grounded at G102.