BAK 2014-2019 GM Silverado / Sierra 1500 5ft 9in Bed BAKFlip MX4 EZ-Lift - 450120
Protect your truck bed with one of the industry's most trusted hard folding tonneau covers. The RealTruck BAKFlip MX4 EZ-Lift is engineered specifically for the 2014 Chevrolet Silverado 1500, 2015 Chevrolet Silverado 1500, 2016 Chevrolet Silverado 1500, 2017 Chevrolet Silverado 1500, 2018 Chevrolet Silverado 1500, 2019 Chevrolet Silverado 1500 LD, as well as the 2014 GMC Sierra 1500, 2015 GMC Sierra 1500, 2016 GMC Sierra 1500, 2017 GMC Sierra 1500, and 2018 GMC Sierra 1500 equipped with the 5-foot 9-inch (69.9-inch) bed.
Featuring new EZ-Lift Technology, the BAKFlip MX4 makes opening and closing your tonneau cover smoother and easier than ever. Combined with Easy Open, Easy Fold, and Flip Assist technologies, you'll enjoy one-handed operation, full bed access, and premium cargo protection without sacrificing your truck's factory styling. Constructed with ultra-strong aluminum panels and a high-density polymer core, the MX4 delivers exceptional strength while maintaining a sleek, low-profile appearance that complements your Silverado or Sierra.
Whether you're searching for the best 2014 Silverado 1500 tonneau cover, 2016 Sierra 1500 hard folding bed cover, 2018 Silverado BAKFlip MX4, 2019 Silverado LD bed cover, or BAK 450120, this premium hard folding cover offers outstanding security, weather protection, and everyday convenience.
Important Vehicle Fitment Information
This tonneau cover fits ONLY:
- 2014–2018 Chevrolet Silverado 1500
- 2019 Chevrolet Silverado 1500 LD (Legacy Body Style)
- 2014–2018 GMC Sierra 1500
Vehicle requirements:
- 5'9" (69.9") bed
- New body style introduced in 2014 (K2XX platform)
- Standard pickup bed
Does NOT fit:
- 6'6" bed models
- 8' long bed models
- 2019 Silverado 1500 (new T1 body style)
- Silverado 2500HD or 3500HD
- Sierra 2500HD or 3500HD
Always verify your truck's bed length before ordering.
Innovative EZ-Lift Technology
The latest generation BAKFlip MX4 features EZ-Lift Technology, significantly reducing the effort required to raise and lower the tonneau cover.
Combined with BAK's Easy Open and Easy Fold systems, operation is smoother than ever, allowing you to access your cargo with one hand—even while wearing work gloves.
Benefits include:
- Reduced lifting effort
- Smooth opening and closing
- One-handed operation
- Improved daily usability
- Excellent for work trucks and recreational vehicles
Whether loading tools, camping gear, or construction materials, EZ-Lift makes accessing your truck bed fast and effortless.
Full Bed Access with Flip Assist
When maximum cargo space is needed, the MX4 folds completely against the cab using BAK's integrated Flip Assist System.
Advantages include:
- 100% truck bed access
- Secure upright driving position
- Ideal for oversized cargo
- No need to remove the cover
- Easy transition between covered and open bed
This versatility makes the MX4 an excellent solution for contractors, outdoor enthusiasts, and everyday truck owners alike.
Heavy-Duty Aluminum Construction
The BAKFlip MX4 is engineered using ultra-strong aluminum panels bonded to a high-density polymer core, providing exceptional durability without excessive weight.
Construction highlights include:
- Aircraft-grade aluminum panels
- High-density polymer core
- Matte black finish
- Scratch-resistant surface
- Corrosion-resistant construction
- Lightweight yet incredibly strong
The result is a premium hard folding cover designed to withstand years of daily use while maintaining its appearance.
Outstanding Weather Protection
Keeping your cargo dry is one of the MX4's greatest strengths.
The cover incorporates:
- Integrated perimeter seals
- Heavy-duty weather stripping
- Tight-fit clamp system
- Drainage channels
- Precision panel alignment
Together, these features help minimize water intrusion during rain, snow, and severe weather, protecting valuable tools, luggage, hunting equipment, camping gear, and everyday cargo.
Engineered for Extreme Conditions
The MX4 has been thoroughly tested to perform in some of the harshest environments.
Testing includes:
- Temperatures from -40°F to 180°F
- Up to 95% humidity
- Long-term weather exposure
- Repeated opening and closing cycles
Whether you live in northern winters, desert heat, or coastal humidity, the MX4 is built to perform year after year.
Maintains Factory Visibility
Unlike many aftermarket tonneau covers, the BAKFlip MX4 has been engineered to preserve visibility.
When installed, it does not block:
- Factory third brake light
- OEM rear backup camera
- Rearward visibility during normal operation
The low-profile design complements the factory body lines while maintaining the clean appearance of your Silverado or Sierra.
Simple DIY Installation
Installation is straightforward thanks to BAK's click-in rail system.
Installation features include:
- No drilling required on most applications
- Installs in less than 30 minutes
- Basic hand tools only
- Clamp-on mounting system
- Complete installation hardware included
Whether you're a first-time installer or experienced DIY enthusiast, the MX4 can typically be installed in your driveway in under half an hour.
Backed by RealTruck Quality
The BAKFlip MX4 is proudly manufactured using premium materials and backed by one of the industry's strongest support networks.
Every cover includes:
- 5-Year Limited Warranty
- US-based customer support
- Premium engineering
- Proven long-term durability
From job sites to weekend adventures, the MX4 is built to protect your cargo while enhancing the appearance and functionality of your truck.
Key Features
- Fits 2014–2018 Chevrolet Silverado 1500 and GMC Sierra 1500
- Fits 2019 Chevrolet Silverado 1500 LD (Legacy)
- Designed for 5'9" bed
- New EZ-Lift Technology
- Easy Open and Easy Fold operation
- Flip Assist system
- One-handed opening
- Full bed access when folded
- Ultra-strong aluminum panels
- High-density polymer core
- Matte black finish
- Integrated weather seals
- Excellent water resistance
- Does not block third brake light or OEM backup camera
- No-drill installation on most applications
- Typically installs in under 30 minutes
- Tested from -40°F to 180°F
- 5-Year Limited Warranty