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The BAKFlip MX4 (GEN 3) from BAK is the ultimate upgrade to the popular truck bed cover, designed specifically for GMC Sierra 1500 models from 2019 to 2021 with the CarbonPro bed. Crafted from high-density polymer-reinforced aluminum, the top panels and side rails offer a 22 percent increase in strength over previous models, ensuring durability for heavy-duty use. The textured matte black finish provides a sleek, professional look that complements any truck while resisting scratches and weathering. This cover's flush mounting design integrates seamlessly with your truck's profile, providing a low-profile aesthetic that enhances the vehicle’s appearance. Its foldable design allows for full bed access, with the cover folding against the cab to facilitate easy loading and unloading without completely removing the cover. The innovative integrated water drainage system effectively channels rainwater away, preventing seepage and protecting cargo from moisture. The cover's all-weather sealing system, including re-engineered perimeter seals and a longer dual-action tailgate seal, ensures superior weather resistance, keeping your gear dry regardless of conditions. Installation is simplified with a new click-in design that reduces setup time by approximately 12 percent, making it feasible for one person to install efficiently. The BAKFlip MX4 also features re-engineered lock components for enhanced security, protecting your cargo from theft with patented auto-latching panels and a robust locking mechanism. Additional features include precision-engineered aluminum side rails for strength, rubber bumpers to prevent cab damage when the cover is folded upright, and a 400-pound weight capacity for heavy loads. Designed to maintain full visibility of the third brake light in all positions, this cover complies with safety standards. Backed by a 5-year warranty, the BAKFlip MX4 (GEN 3) offers a perfect combination of durability, security, weather protection, and style for GMC Sierra owners seeking a reliable tonneau cover that enhances truck functionality and appearance.
Features:
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
