GMC Sierra Tonneau Cover - BAK BAKFlip MX4 EZ-Lift (2014-2018). A hard-folding bed cover built for assisted operation, reliable protection, and everyday usability on your Sierra.

MX4 EZ-Lift uses spring/torsion-assisted panels, an oversized paddle handle, and Flip Assist for quick, one-handed opening—even with gloves. Rigid aluminum panels with a high-density polymer core and an auto-latch system add security. Perimeter seals and tight-fit clamps help keep weather out. Fold forward for 100% bed access without blocking the third brake light or camera. DIY click-in install takes about 30 minutes, and it’s backed by a 5-year warranty, tested from -40° to 180° and 0–95% humidity.

Features

• Hard aluminum panels with polymer core
• Easy Open, Flip Assist; one-handed use
• Oversized paddle handle; auto-latch locking
• Perimeter seals and tight-fit clamps
• 100% bed access; maintains light/camera visibility

Questions or need fitment help? Call Austin, TX at 512-982-9393 or Los Angeles, CA at 562-981-6800. We offer installation and customization at both locations. Buying multiple items? Contact us for shipping discounts; we install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov