LED Sidemarkers for 2024-2026 GMC Sierra HD 2500/3500 (set)

These LED Sidemarkers for the GMC Sierra HD 2500 and 3500 are a direct-fit replacement assembly that upgrades the factory side marker lighting with brighter, more consistent output for improved visibility to other drivers on the road and at worksite approaches.

Available in Amber, Clear, or Smoked lens finishes, you can match your truck's existing trim style or go for a blacked-out look without sacrificing function. Each option delivers the side-facing illumination your Sierra HD needs to be seen clearly from angles the headlights and taillights don't cover — useful any time you're hauling, towing, or parked on a busy road shoulder.

The assemblies are built to fit your Sierra HD using a vehicle-specific bracket, so installation is straightforward without cutting or adapting. If you're already upgrading your headlights, fog lights, or bed lighting, swapping in these sidemarkers is a practical finishing touch that ties the whole lighting setup together.