SKU:BAK448133
BAK
BAK BAKFlip MX4 6ft 9in Bed Cover - Matte Black | 2020-2026 GMC Sierra 3500HD
BAK BAKFlip MX4 6ft 9in Bed Cover - Matte Black | 2020-2026 GMC Sierra 3500HD
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The BAK BAKFlip MX4 (GEN 3) fits the 2020-2026 GMC Sierra 3500HD with a 6ft 9in bed and delivers folding hard-panel security with a flush, matte black profile.
Product Overview
The MX4 GEN 3 is a hard folding tonneau built from heavy-duty aluminum top panels and side rails, reinforced with high-density polymer cores. Panels are 22 percent stronger than the original MX4.
An auto-latching system secures the cover when closed, and re-engineered lock components improve resistance to forced entry versus GEN 2.
EPDM rubber perimeter seals and tight-fit clamps block seepage, while a 13 percent longer dual-action tailgate seal protects the rear and preserves factory tailgate function.
Features & Specifications
- Fits: 2020-2026 GMC Sierra 3500HD with 6ft 9in bed
- Hard folding tonneau cover, matte black finish
- Aluminum panels with high-density polymer cores
- 22 percent stronger panels vs original MX4
- Patented auto-latching system secures when closed
- Re-engineered locks resist forced entry
- EPDM rubber perimeter seals block water seepage
- 13 percent longer dual-action tailgate seal
- Sits flush with bed rails for clean profile
Fitment
This part fits the following vehicles:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2026 | GMC | Sierra 3500 HD | AT4 |
| 2020-2021 | GMC | Sierra 3500 HD | Base |
| 2020-2026 | GMC | Sierra 3500 HD | Denali |
| 2024-2026 | GMC | Sierra 3500 HD | Denali Ultimate |
| 2022-2026 | GMC | Sierra 3500 HD | Pro |
| 2020-2026 | GMC | Sierra 3500 HD | SLE |
| 2020-2026 | GMC | Sierra 3500 HD | SLT |
Shipping & Returns
Shipping & Returns
Products that are in stock ship within 1-3 business days of being ordered. Please note some items are made to order, or could be out of stock. If you have any questions regarding stock please contact us through the live chat or email and we would be happy to help
Warranty Info
Warranty Info
All warranties are through the manufacturer, they will be facilitated by State Side Performance (some manufacturers require the end user contact the manufacturer directly to facilitate the warranty, in that case we will recommend you contact the manufacturer. Please contact us by Email if you have any questions or concerns regarding a warranty claim.
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Free Shipping for Non Oversize Items of $250
More info on shipping policyFree shipping applies to items that are shipped via ground through UPS or FedEx and are over $250 going to the continental 48 states. This does not apply to Alaska or Hawaii, and does not apply to any item(s) that are shipped via freight or with any other option other than ground shipping.
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Return Policy
More info on refund and return policyReturns must be UNOPENED, UNUSED, HAVE ALL ORIGINAL PACKAGING, BE IN NEW CONDITION, HAVE A VALID RMA, BE WITHIN A 30 DAY RETURN WINDOW FROM THE DATE OF PURCHASE.