If your heavy-duty Silverado or Sierra has the MultiPro or Multi-Flex tailgate, the Pro X15 1473701 is the version that works with it. It is not compatible with the CarbonPro bed.
Open it with one finger on the trigger latch. Stay-straight controls keep the roll aligned, and the quick-release handle removes the cover completely without tools.
DriveTight tension control stays tight with no adjusting, and the RTxGrip multi-tiered hook-and-loop closure holds down the edges.
Expect an install of about 30 minutes to an hour. It clamps on, so nothing gets drilled, and the quick-release handle makes removal easy.
Check the clamps one week after install. Keep sharp or shifting cargo away from the fabric, roll the cover periodically if it stays open for long.