• BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
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  • BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
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BAK448121

BAK

BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500

BAK BAKFlip MX4 Hard Folding Bed Cover - 6 ft 6 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500

$1,249.99 USD
$1,249.99 USD
Sale Sold out
Shipping calculated at checkout.

In stock

The BAK BAKFlip MX4 (GEN 3) fits the 2014-2018 GMC Sierra 1500 6ft 6in bed and delivers a hard folding tonneau with heavy-duty aluminum panels and a flush, matte black finish.

Install Difficulty: DIY Possible
Clamps to factory bed rails with included hardware; typically installs in 30-45 minutes with no drilling required.

Product Overview

The MX4 (GEN 3) uses heavy-duty aluminum top panels and side rails reinforced with high-density polymer cores. Each panel is 22 percent stronger than the original MX4.

Security comes from BAK's patented auto-latching system and re-engineered lock components for improved resistance to forced entry. EPDM rubber perimeter seals and a 13 percent longer dual-action tailgate seal keep water out.

The cover sits flush with the bed rails for a clean, low-profile look on your Sierra 1500.

Features & Specifications

  • Fits: 2014-2018 GMC Sierra 1500
  • 6ft 6in bed length fitment
  • Heavy-duty aluminum panels with high-density polymer cores
  • 22 percent stronger panels vs original MX4
  • Patented auto-latching system secures cover when closed
  • Re-engineered locks resist forced entry
  • EPDM rubber perimeter seals block water seepage
  • 13 percent longer dual-action tailgate seal
  • Flush-mount design with matte black textured finish

Fitment

This part fits the following vehicles:

Year Make Model Submodel
2014-2018 GMC Sierra 1500 Base
2014-2018 GMC Sierra 1500 Denali
2014-2018 GMC Sierra 1500 SLE
2014-2018 GMC Sierra 1500 SLT
2019 GMC Sierra 1500 Limited Base
2019 GMC Sierra 1500 Limited SLE
⚠ Submodel Fitment: If your submodel is not listed in the fitment table above, we cannot confirm fitment. Please contact us before purchasing to verify.

Shipping & Returns

Tracking is typically provided within 3–5 business days; items shipping direct from the manufacturer may take 5–7. Some items are made to order or may be backordered. Questions about stock? Reach us through live chat or email.

Warranty

All warranties are through the manufacturer and are facilitated by Stateside Performance. Some manufacturers require the end user to contact them directly; in that case we will point you to the right contact. Email us with any warranty questions.

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  • Free shipping over $250

    Free 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.

    Shipping policy 

  • 30-day returns

    Returns must be requested within 30 days of delivery. Parts must be new, unused, uninstalled, and in original packaging, with an RMA. Some items are final sale.

    Return policy