Headlamp Leveling (Export)
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 IGN 1 10A fuse in the engine wiring harness junction block supplies battery positive voltage to the to both the headlamp leveling switch and the headlamp leveling motors through different terminals in the junction block. The headlamp leveling switch varies the amount of current to the actuators causing them to move simultaneously up or down to each selected position. Ground for the actuators and the switch are supplied by G100.