Replace the Third Brake Light on 2000 GMC Sierra morsunled.mybloghunch.com

Before installing the new light, clean the area thoroughly. The roof panel where the light seats is likely dirty and may even show signs of previous water tracks. Use rubbing alcohol or a wax remover to clean this surface. Install the new light by connecting the wiring harness first. Seat the new gasket flush against the cab, reinsert the screws, and tighten them firmly—but do not overtighten, as this can crack the new lens or compress the gasket unevenly.