Sierra 1500 4WD V8-4.8L (2007)
3. Install the weatherstrip (1) to the pinch-weld flange (2). Ensure that the weatherstrip is fully seated.
4. Install the front door sill plate. Refer to Front Side Door Sill Plate Replacement (Regular Cab/Crew Cab) Front Side Door Sill Plate Replacement
(Extended Cab) or Rear Side Door Sill Plate Replacement (Extended Cab) Rear Side Door Sill Plate Replacement (Crew Cab) .