• BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
  • BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500 - Stateside Performance - Tonneau Covers - Hard Fold - BAK - BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500
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BAK448120

BAK

BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500

BAK BAKFlip MX4 Hard Folding Bed Cover - 5 ft 8 in Bed, Matte Finish | 2014-2018 GMC Sierra 1500

$1,199.99 USD
$1,199.99 USD
Sale Sold out
Shipping calculated at checkout.

In stock

The BAKFlip MX4 (GEN 3) fits the 2014-2018 GMC Sierra 1500 5ft 8in bed and delivers a flush-mount hard folding tonneau with 22 percent stronger panels than the previous generation.

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

Product Overview

The BAKFlip MX4 (GEN 3) is a four-panel hard folding tonneau built from heavy-duty aluminum top panels and side rails, reinforced with high-density polymer cores.

Panels sit flush with the bed rails for a clean profile, finished in textured matte black across all surfaces.

Revised EPDM rubber perimeter seals and a 13 percent longer dual-action tailgate seal keep cargo dry, while BAK's patented auto-latching system with re-engineered lock components secures the cover the moment it closes.

Features & Specifications

  • Fits: 2014-2018 GMC Sierra 1500
  • Also fits 2019 GMC Sierra 1500 Limited (Legacy body)
  • 5ft 8in bed length fitment
  • Heavy-duty aluminum panels with high-density polymer cores
  • 22 percent stronger panels vs. previous generation
  • Textured matte black finish, flush-mount profile
  • Patented auto-latching system with re-engineered locks
  • EPDM perimeter seals and 13 percent longer tailgate seal
  • Maintains full factory tailgate functionality
  • Four-panel hard folding design

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 All
⚠ 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