If the fog lights on your 2003-2007 Chevy Silverado or 2002-2006 Chevy Avalanche are cracked, yellowed, or just not working, this pair is a direct replacement. They're designed to bolt right on without any modification—just swap out your old ones. The set includes both the left and right side housings, and they come with H10 halogen bulbs already installed. They fit a bunch of models: Silverado 1500, 1500HD, 2500, 2500HD, 3500, and the Avalanche 1500/2500 (but NOT Avalanche models with body cladding). They'll significantly improve your visibility in fog, heavy rain, or at night. A straightforward fix to keep your truck looking and functioning its best. (Note: Mounting hardware isn't included, so you might need to reuse your old bolts).