BackRack Crossover Toolbox: two black toolbox mounting rails with J-bolts, bolts, nuts and washers on a white background
BackRack Crossover Toolbox: black rack raised on toolbox brackets behind a polished diamond plate crossover toolbox on a white truck
BackRack Crossover Toolbox: black rack rising behind a black diamond plate toolbox on a pickup, with trees in the background
BackRack Crossover Toolbox: side view of a two-tone pickup bed with a black diamond plate toolbox and a rack partly visible behind the cab
BackRack Crossover Toolbox Installation Kit for a 31 inch toolbox, two black toolbox brackets with stake pocket bolts and hardware on a white background

BackRack Crossover Toolbox Installation Kit for 1999-2007 GMC Sierra 1500 / 2500 HD & 1999-2006 Chevrolet Silverado 1500 / 2500 HD & 2001-2007 GMC Sierra 3500 HD & More

$139.99
FREE SHIPPINGNo sales tax Only 1 leftIn stock now  Estimated delivery
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See it on a truck

Rack and toolbox together

A crossover toolbox and a BackRack frame share the front of the bed, so tools stay locked away and the rear window stays guarded.

Room left for cargo

Because the toolbox sits on the brackets and slides forward, the bed keeps as much length as possible for lumber, gear and supplies.

Rack and toolbox together

A crossover toolbox and a BackRack frame share the front of the bed, so tools stay locked away and the rear window stays guarded.

Room left for cargo

Because the toolbox sits on the brackets and slides forward, the bed keeps as much length as possible for lumber, gear and supplies.
BackRack Crossover Toolbox Installation Kit: Black rack rising behind a black diamond plate toolbox on a pickup, with trees in the background.

Set up for the workday

A rack, a toolbox and matched brackets make a work truck that is organized from the cab back.

Frequently Asked Questions

Straight answers on specs, fit and support

Does this kit include the headache rack or the toolbox?

No. The kit is the mounting hardware only. The BackRack frame and the crossover toolbox are each sold separately.

Which toolbox size do I need?

Measure the toolbox front to back across its base and pick the matching 21" or 31" kit. The bracket length has to suit the box that will sit on it.

Do I have to drill?

You fasten the toolbox to the brackets with screws or bolts through the toolbox floor, so plan on drilling the box. Whether the truck itself needs any drilling depends on the application, and the brackets-only parts may need drilling on some trucks.

Can I run a tonneau cover with this kit?

No. The toolbox kit is not compatible with the BackRack tonneau cover adapter brackets. A tonneau setup uses a tonneau adapter kit instead.

What is the difference between this and the low profile kit?

Here the toolbox rides on top of the brackets and can slide forward. The low profile drill kit sets the toolbox down at bed rail height using the toolbox's own clamps, and it requires drilling the bed rail.

Can I buy just the brackets?

Yes. The brackets-only parts replace the toolbox brackets and reuse the fasteners from your original kit.