Choose the mount that matches your cover: inside the rails or on top of them. This Tonneau Adapter kit is for a bed with a tonneau cover, it is used in place of the standard kit, and the BackRack rack frame is sold separately. Offered in cover mount Inside Rail Cover or Top of Rail Cover. Parts 40226 and 50226 are the tonneau adapter for 2023-2026 Chevrolet Colorado / GMC Canyon.
Choosing your options:
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Cover Mount, Inside Rail Cover: For tonneau covers that clamp to the inside of the bed rails.
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Cover Mount, Top of Rail Cover: For covers that sit on top of the bed rails; this mount raises the BackRack cab guard by 2" to clear the cover.
What's Included:
- Steel tonneau adapter brackets for the listed truck application
- The hardware needed to mount the rack with a tonneau cover
The BackRack rack frame and the tonneau cover are sold separately. A standard installation kit is not needed with this adapter.
Features
Rack and tonneau together
The adapter brackets let a BackRack frame mount ahead of a tonneau cover so both can stay on the truck.
Two cover mount styles
Pick the inside rail version for covers that clamp inside the bed rails, or the top of rail version for covers that sit on the rails.
Complete mounting kit
The kit carries what the rack needs to mount, so a separate standard installation kit is not required.
Fits most tonneau brands
The adapters are made to work with most brands of tonneau cover in the matching mount style.
Black powder coated steel
Steel brackets in black powder coat resist corrosion and blend with a black frame.
Fitment & Compatibility
Fit guidance: Fits the 2023-2026 Chevrolet Colorado / GMC Canyon. Every option on this page fits these vehicles.
Rack frames this kit mounts: 10600, 15002, SRL900, SRX900. The rack frame is sold separately; each frame page lists the kit for every truck it fits.
Specifications
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Brand: BackRack
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Series: Tonneau Adapter
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Material: Steel
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Finish: Black powder coat
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Setup: Bed with a tonneau cover
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Cover mount styles: Inside rail or top of rail
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Standard kit: Not required
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Warranty: 1 year limited
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Part numbers: 40226 (Inside Rail Cover); 50226 (Top of Rail Cover)
Installation
Type: Tonneau adapter rack mount · Install: Do it yourself at home · Tools: Common hand tools
Follow the instructions for this adapter. The top of rail version lifts the cab guard to clear the cover, and the steps depend on the truck.
Resources
An installation guide for this part number is not available to download. Our team can answer installation questions before you order; contact us with the part number.
Warranty, Shipping & Returns
Warranty. BackRack covers its installation kits with a 1 year limited warranty against defects in material and workmanship. Coverage applies to the original end user only and cannot be transferred; BackRack repairs or replaces parts it finds defective. Inspect on delivery. Please inspect the box and every part when it arrives and report any shipping damage before installing, so a replacement can be arranged quickly.
Returns. Unused items in their original packaging can be returned within 30 days of delivery. If an item arrives damaged, defective or wrong, return shipping is on us. See our Returns & Refunds Policy, or email support@prestigetruck.com with any question.
About BackRack
BackRack builds steel headache racks that stand between the truck bed and the cab, guarding the rear window and cab from cargo that slides forward. The racks are made for trucks that work hard during the week and still need to look sharp when the job is done.
Every BackRack frame mounts to the bed through a truck-specific installation kit. Separate kits let the rack live alongside a crossover toolbox, a bedliner or a tonneau cover that clamps to the inside of the bed rail.
Because a BackRack sits low behind the cab, the truck still fits in a home garage and multi-level parking. Light brackets, tool holders, side rails and a rear bar turn the same frame into a platform for lights, long loads and gear, and the steel is finished in a powder coat applied in house.
