BAK 448135 – BFMX4 19-26 GM 5’9

$1,199.99

BFMX4 19-26 GM 5’9

Volume order? Ask about fleet discounts & net‑30 terms.

SKU: BKDA-448135 Category:

Description

The best-selling truck bed cover in the world just got better.

Introducing the new and improved RealTruck BAKFlip® MX4 (GEN 3)—an evolution of RealTruck’s most popular tonneau cover. This next-generation upgrade builds on everything truck owners already love about MX4, now enhanced with improved functionality, greater durability, and elevated security.

The new and improved BAKFlip MX4 is constructed primarily from alloy materials, including heavy-duty aluminum top panels and side rails. Reinforced with high-density polymer cores, each panel delivers a 22 percent increase in overall strength compared to the original model.

Security is also enhanced. In addition to BAK’s patented auto-latching system, which automatically secures the cover when closed, the BAKFlip MX4 (GEN 3) features re-engineered lock components for improved resistance to forced entry compared to the GEN 2. No matter the cargo you’re transporting, you can rest assured knowing your gear’s protected.

When the weather turns, the BAKFlip MX4 (GEN 3) holds strong. Revised EPDM rubber perimeter seals and tight-fit clamps provide our best seal yet, preventing seepage between the bed cover and bed rails. At the rear of the cover, a 13 percent longer dual-action tailgate seal provides weather protection for the tailgate. This innovative design also improves operation, maintaining factory tailgate functionality regardless of the cover’s position.

The BAKFlip MX4 isn’t only durable, it’s also sleek and stylish. Unlike competitors, the BAKFlip MX4 sits flush with your pickup’s bed rails, practically disappearing into your truck’s profile. And with a sleek, textured matte black finish across all surfaces, the MX4 looks great whether open or closed.

BAKFlip MX4 (GEN 3) Hard Folding Truck Bed Cover – Matte Finish – 2019-2026 (New Body Style) GMC Sierra (with CarbonPro Bed) 5′ 9″ Bed

Additional information

Weight 71 lbs
Dimensions 68 × 8 × 23 in

Vehicle Fitment

Year(s)MakeModelSubmodelBody TypeNotes
2026GMCSierra 1500BASE-Matte Finish; BAKFlip MX4 (GEN 3); CarbonPro Bed: With CarbonPro Bed
2025GMCSierra 1500BASE-Matte Finish; BAKFlip MX4 (GEN 3); CarbonPro Bed: With CarbonPro Bed
2024GMCSierra 1500BASE-Matte Finish; BAKFlip MX4 (GEN 3); CarbonPro Bed: With CarbonPro Bed
2023GMCSierra 1500BASE-Matte Finish; BAKFlip MX4 (GEN 3); CarbonPro Bed: With CarbonPro Bed
2022GMCSierra 1500BASE-Matte Finish; BAKFlip MX4 (GEN 3); CarbonPro Bed: With CarbonPro Bed
2021GMCSierra 1500BASE-Matte Finish; BAKFlip MX4 (GEN 3); CarbonPro Bed: With CarbonPro Bed
2020GMCSierra 1500BASE-Matte Finish; BAKFlip MX4 (GEN 3); CarbonPro Bed: With CarbonPro Bed
2019GMCSierra 1500BASE-Matte Finish; BAKFlip MX4 (GEN 3); CarbonPro Bed: With CarbonPro Bed; New Body Style

Specifications

UPC00192631034292
Weight71 lbs
Dimensions68 x 8 x 23 in
Actual Color
Cargo Light Included
Color
Compatible with Bed Caps
Cover Color
Cover Material
Design
Drilling Required
Electric
Finish
Front Opening
Full Bed Access
Install Time
Lockable
Low Profile
Material
Mounting Hardware Included
Operation
Paintable
Painted
Rails To Install
Remote Control Included
Sits on Truck Rails
Style
Tool Box Compatible
Tool Box Included
Type
Universal Or Specific Fit

Warehouse Availability

This product ships directly from the manufacturer. Please contact us for current availability and lead times.

Phone: 800-953-7108   Hours: M-F 8am-6pm | Sat 8am-1pm

Last updated: 2026-07-08 10:45:39