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BAKFlip MX4 GMC Sierra Tonneau Bed Cover - BAK-448130

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BAKFlip MX4 GMC Sierra Tonneau Bed Cover - BAK-448130

Sleek, secure, and durable–what else could you want? The bakflip-MX4 tonneau cover is a top-of-the-line hard-folding cover engineered for maximum aesthetics, weather resistance, and security.

The bakflip-MX4 is constructed entirely from alloy materials, including heavy-duty aluminum top panels and side rails.

Unlike comparable soft-folding tonneau covers, you can't simply slice through the MX4 with a pocket knife.

No matter the cargo in the bed, you can rest assured that your gear's protected by a premium bed cover from BAK industries.

BAKFlip MX4 GMC Sierra Tonneau Bed Cover Back View

Full Bed Access

When you need to haul large items, just fold the cover toward your cab and secure it in place with the supplied prop rods.

The prop rods rest in an improved rail clip when not in use and upgraded cab bumpers prevent the cover from scuffing your paint.

Upgraded Side Rails

Channeled rails hold the cover in place while shut. These rails feature rubberized endcaps, which prevent any raw aluminum from being exposed.

Universel Tailgate Functionality

Triple fin seals allow the tailgate to operate whether the cover is open or closed. The cover can be closed with the tailgate up too.

Matte Black Finish

The all new matte black finish offers superior scratch resistance and UV protection.

No Drill Clamp

The MX4 can be installed in less than an hour without drilling into the truck bed.

Easy Operation

Each panel automatically latches to the cover's mounting rails as the cover closes. Latches deactivate with a simple pull of the cable.

BAKFlip MX4 GMC Sierra Tonneau Bed Cover Full View

Key Features

Heavy-duty aluminum construction
Sleek matte-black finish
Extra-strong prop rod clips for a secure hold
Folds toward the bulkhead for 100-percent bed access
Premium rubber bumpers protect the cab when folded into the upright position
Simple no-drill installation
Weather-resistant EPDM seals and end caps
400-lb. Weight capacity
Includes drain tubes (may require drilling on certain applications)
5-year warranty

BAKFlip MX4 GMC Sierra Tonneau Bed Cover Side View

Vehicle Fitment

Choose from Bed Sizes (5'9", 5' 10", 6' 7" and 8' 2")

2019-2024 Sierra/Silverado 1500

Choose from Bed Sizes (6'10" and 8'2")

2020-2024 Sierra/Silverado 2500HD/ 3500HD

BAKFlip MX4 GMC Sierra Tonneau Bed Cover View

What Our Experts Think

Durable Truck Bed Covers – BAK specializes in hard folding and rolling tonneau covers, offering rugged protection for pickup truck beds.
Secure and Weather-Resistant – Products are designed to withstand harsh weather and secure cargo with heavy-duty locking mechanisms.
Low-Profile Design – Many BAK covers sit flush with the bed rails, maintaining a sleek, factory look while improving aerodynamics.
Easy Operation – Innovative folding and rolling mechanisms allow for quick access to the truck bed without removing the cover.
Vehicle-Specific Fitment – Engineered for a perfect fit on a wide range of truck makes and models, enhancing performance and appearance.

Q&A

Q: What types of tonneau covers does BAK offer?
A: BAK offers hard folding, rolling, and retractable covers, including models like BAKFlip, Revolver, and RollBAK.

Q: Are BAK covers weather resistant?
A: Yes, BAK covers are engineered to resist rain, snow, and harsh weather conditions.

Q: What is the BAKFlip MX4?
A: A popular hard folding tonneau cover known for its matte finish, durability, and enhanced security features.

Q: Do BAK covers improve fuel efficiency?
A: Yes, installing a tonneau cover can help reduce aerodynamic drag and improve fuel economy.

Q: Can BAK covers be locked for security?
A: Yes, most BAK covers offer locking features when paired with a locking tailgate.

Q: Are BAK covers compatible with bed liners?
A: Yes, BAK covers are generally compatible with most bed liners and rail systems.

Q: Is installation of BAK covers difficult?
A: No, most covers are designed for quick, no-drill installation using clamp-on rails.

Q: Are BAK covers low profile?
A: Yes, BAK covers are designed to sit flush with the bed rails for a sleek, streamlined appearance.

Q: Do BAK covers come with a warranty?
A: Yes, most BAK covers include a limited manufacturer warranty, varying by model.

Maintenance Tips

Clean the Tonneau Cover Regularly: Use mild soap and water to clean the surface of your BAK truck bed cover. Avoid harsh chemicals that can damage the finish or seals.
Inspect Seals and Hinges: Check the rubber seals and hinge areas for wear, cracks, or dirt buildup. Clean and condition the seals with a rubber protectant to maintain flexibility and prevent leaks.
Lubricate Moving Parts: Lightly lubricate the locking mechanisms, hinges, and latches with a silicone-based lubricant to keep them operating smoothly.
Tighten Mounting Hardware: Periodically check and tighten all bolts, clamps, and brackets to ensure the cover stays securely attached to the truck bed.
Avoid Excess Weight: Do not place heavy loads on the tonneau cover unless it is specifically rated for such use. Excessive weight can cause bending or damage to the panels.
Remove Debris: Clear any leaves, snow, or debris that accumulates in the cover’s channels or rails to prevent drainage issues or interference with opening and closing.
Operate Gently: When opening or closing the cover, do so with steady, even pressure. Avoid slamming or forcing the panels to prevent wear or damage.
Store Properly When Open: If your BAK cover folds or retracts, secure it using the provided straps or locking mechanisms to prevent flapping or damage while driving.