Review on Chrome Housing Amber Reflector Clear Lens Replacement Headlight Assembly and Park/Signal 🚦 Headlamp (GGMSR99-A4) - Compatible with 1999-2006 GMC Sierra 1500 2500 3500, 2000-2006 GMC Yukon by Aaron Ali

On the right hand headlight, the low and high beam bulbs are installed in the opposite direction (clockwise) from the original assembly (counterclockwise). It's okay if you don't have the minimum knowledge. Mounting the headlight on the truck was pretty tight; A bit tricky to insert the locking pins but doable if you make sure everything lines up before installing the pins. The turn signal bulbs don't appear to seal on either the left or right side but it could be a bulb socket gasket as they are 17 years old (all the others fit fine). A verdict on the lighting concept is still pending. I set them at dawn and haven't ridden in the dark yet. The left headlight didn't have much light dispersion. The brightness was good.