BAKFlip FiberMax Hard Folding Tonneau Cover for 2020-2025 Chevrolet Silverado / GMC Sierra 2500/3500 HD (6'9" Bed)

The current Silverado and Sierra HD have a 6'9" bed that is deep as well as long, and on a truck this size the cover spends a lot of its life holding weather off tools rather than looking pretty. The FiberMax suits that job. Its fiberglass-reinforced polymer panels handle temperature swings, road grit, and the occasional dropped load without cracking or denting, and they are cut and puncture resistant in a way no soft cover on a job-site truck can claim. The rails clamp to the bed rail with no drilling and route water down an internal channel to the drain hoses. Three hundred pounds evenly distributed on the closed cover.

What's Included:

• BAKFlip FiberMax hard folding tonneau cover, pre-assembled
• Two clamp-on mounting rails
• Clamp set and hardware kit
• Nylon buckle straps and integrated prop rods
• BAKFlip hard-folding install guide

Features

Fiberglass-Reinforced Polymer Panels
The FiberMax leads with its panels. Fiberglass-reinforced polymer tops handle impact, abrasion, and temperature swings better than vinyl or a plain aluminum skin, and they sit on an aluminum substructure that spreads the load. Closed, the cover carries 300 lb evenly distributed, which is enough for boards, plywood, or a flat load laid across the bed.

UV Resistant, So the Finish Stays Put
The outer panels are highly UV resistant. That matters if your truck lives outside: the textured gloss-black finish holds its color and depth through years of sun instead of chalking and fading the way an untreated surface does.

Cut and Puncture Resistant Where a Soft Cover Is Not
A knife goes through a soft tonneau in a second. The FiberMax panels are rigid FRP, so they resist cutting and puncturing and turn away most casual break-in attempts. Latch the cover down over a closed tailgate and what is in the bed stays out of sight and out of reach.

Sealed Rails and an Internal Water Channel
EPDM rubber outer rail seals and rounded hinges block most water right at the rail. What gets past runs into an internal channel built into the rails, down the tracks, and out the drain hoses. The FiberMax uses a conventional tailgate seal, so close the tailgate first and the cover second for the best water resistance.

Patented Rail With a Load-Bearing Flange
The rail is the part most covers skimp on. BAK's patented design carries the panels on a load-bearing flange that runs the length of the bed rather than at a handful of points, which is what makes the 300 lb evenly distributed rating honest and keeps the panels from flexing between supports.

Buckle Straps, Prop Rods, and No Drilling
Reach under the cover with the tailgate open, pull the release cables, and fold it forward. Nylon buckle straps hold the two-thirds-open position, and the integrated prop rods hold it folded against the cab for full bed access. Installation clamps on with the included hardware in under an hour, no drilling or trimming, and the cover is assembled in Missouri and backed for 3 years.

Fitment & Compatibility

Specifications

• Cover Type: Hard folding (tri-fold) tonneau cover
• Material: Fiberglass-reinforced polymer (FRP) top panels over an aluminum substructure
• Frame: Patented aluminum rail with a load-bearing flange, clamp-on
• Finish: Textured gloss black, UV resistant
• Bed Access: Two thirds open on the nylon buckle straps, 100% folded to the cab on the prop rods
• Weight Capacity: 300 lb, evenly distributed
• Sealing: EPDM outer rail seals, rounded hinges, internal water channel with drain hoses, conventional tailgate seal
• Security: Cut and puncture resistant FRP top panels over a latched aluminum frame
• Drilling Required: No, clamp-on install
• Install Time: Under 1 hour
• Install Difficulty: Level 1, simple
• Fits: 6'9" bed, see fitment table
• Assembled In: Missouri, USA
• Warranty: 3-year limited

Installation

Type: Clamp-on, no drilling  ·  Time: Under 1 hour (varies by truck)  ·  Tools: Basic hand tools, a socket or wrench set  ·  Difficulty: Level 1, simple, one-person DIY

The BAKFlip FiberMax arrives pre-assembled with every clamp, fastener, and instruction sheet in the box. Nothing is cut, drilled, or modified on the truck. Work through the included BAKFlip hard-folding install guide for clamp placement, and remember the FiberMax uses a conventional tailgate seal, so the tailgate closes before the cover.

Watch the model-specific installation walkthrough:

Warranty, Shipping & Returns

Warranty. 3-Year Limited Warranty from BAK Industries against defects in materials and workmanship, backed by US-based product support. Coverage runs to the original purchaser and is not transferable, and warranty registration or a dated proof of purchase may be required. It does not cover accident damage, neglect, improper installation, or improper servicing. To keep coverage: clean with mild automotive soap and water only, keep the cover secured at every point while the vehicle is moving, clear snow and ice before opening it, re-check the clamps after the first week of driving and periodically after that, and remove the cover before towing the truck from the rear.

Free shipping. This item ships free to the lower 48 states. Because it is an oversized item, it ships by freight and typically arrives in 3 to 7 business days.

Inspect on delivery. Please inspect the packaging before signing. If you see any damage, note it on the delivery receipt and contact us right away, and we will make it right.

About BAK Industries

BAK Industries has engineered premium truck bed covers in the USA for decades and is a flagship tonneau brand of RealTruck, one of the largest truck-accessory manufacturers in North America. Its hard-folding BAKFlip and retractable Revolver lines set the benchmark for the category, pairing heavy-duty aluminum construction with a low-profile, weathertight design.

Every BAK cover is built for real-world truck use: no-drill, clamp-on installation that mounts in about 30 minutes, full bed access when folded or rolled back, and reinforced latching that keeps cargo secure and dry. The lineup runs from the value-focused BAKFlip MX4 and G2, to the flagship FRP-panel F1 and FiberMax, to the industrial Revolver X2 and X4s roll-ups, covering nearly every popular truck and bed length.

Backed by US-based product support and a multi-year manufacturer warranty, a BAK cover is a buy-it-once upgrade that protects tools, cargo, and gear while giving a truck a cleaner, more finished look.