Tonneau Cover With a Toolbox: Which Types Fit?

On this page (8 sections)

1. Which tonneau cover with toolbox setup fits your needs?
2. Who should choose the RealTruck TonneauMate?
3. Who should choose the Access 62199?
4. Who should choose the Access 62329?
5. What should you measure before choosing?
6. How should you set up and check the combination?
7. How do you prevent leaks, wear, and blocked access?
8. Which toolbox and cover setup should you choose?

A tonneau cover with toolbox storage works when the box and cover use compatible mounting space and can both open fully. Choose a toolbox edition cover behind an over-rail box, or a suspended toolbox beneath a suitable cover.

Start with the equipment you already own. Keeping a useful toolbox may mean changing the cover; keeping a suitable cover may mean choosing a box that hangs below it.

The 3 products below serve those different jobs. The RealTruck TonneauMate is a toolbox, while the 2 Access products are covers, so they aren't direct replacements for one another.

Which tonneau cover with toolbox setup fits your needs?

Keep an over-rail toolbox with a compatible toolbox edition cover; use a suspended box when you want storage below the cover. Neither approach removes the need to check your exact truck and mounting hardware.

An over-rail box spans the bed near the cab and occupies space where a standard cover's front rail may sit. A toolbox edition cover accommodates that arrangement and covers the remaining bed behind the box.

A suspended box hangs inside the bed, leaving the cover above it. This suits drivers who want tools out of sight and space beneath the box for long cargo.

Your access routine matters, too. A box beneath a cover requires you to open enough of the cover to reach its lid, so check how far forward you can comfortably reach from beside the truck.

For a wider view of cover styles, see tonneau cover types and how to choose.

Will a standard tonneau cover fit with an over-rail toolbox?

Assume you need a purpose-built pairing until compatibility is confirmed. A standard cover's front rail, side rails, or clamps may occupy the same space as the toolbox.

Don't shorten rails, shift mounting points, or trim seals just to make parts meet unless the instructions allow it. Getting both pieces onto the bed doesn't prove that their seals and attachments will work together.

Who should choose the RealTruck TonneauMate?

Choose the TonneauMate if you need a toolbox beneath a compatible cover and want to preserve space below it. Skip it if you need a cover, already have a suitable over-rail box, or have an excluded bed style.

The RealTruck TonneauMate Toolbox Cover is a suspended toolbox despite its display name here. It provides 10 cubic feet of storage with a 200 lb capacity and has multiple mounting positions.

Its keyed lock adds a separate closure for tools, while the cover keeps the box out of sight. RealTruck says its composite construction resists cracking, warping, and corrosion, and backs it with a 2-year warranty.

RealTruck says the low-profile mounts work beneath most bed covers, with soft or hard roll-up covers the best match. Fit covers most full-size trucks, excluding Flareside, Stepside, and composite beds.

This setup suits someone carrying tools alongside lumber or other long loads. Measure the actual space beneath the mounted box before assuming your usual cargo will slide under it.

RealTruck specifies no-drill installation and says one person can install it in under 30 minutes. Allow extra time to choose a mounting position that leaves the lid, cover release, and cargo path clear.

Who should choose the Access 62199?

Consider the Access 62199 if you want to keep an over-rail toolbox and need a matching roll-up cover. Skip it until Agri-Cover confirms the part number fits your truck, bed, and box.

The Access 62199 Toolbox Roll-Up Cover uses vinyl, a twist-dial release, and dual side latches. Its dial tension adjuster lets you fine-tune the cover's tension.

These controls suit drivers who regularly switch between covered cargo and an open bed. A roll-up design also avoids the stack of folded panels associated with folding covers, though the rolled bundle still needs room near the toolbox.

Agri-Cover describes the 62199 as protection from water, snow, and dust. Plan for weather resistance rather than assuming tools or cargo will stay dry in every condition.

The available fit information doesn't establish a specific truck-year and toolbox-size match for this part number. Confirm those details before buying; the words “Tool Box Edition” aren't enough to establish fit.

Who should choose the Access 62329?

Choose the Access 62329 for a compatible Silverado or Sierra with an over-rail toolbox. Skip it for other trucks, other bed lengths, or a box outside its supported fit.

The Access 62329 Toolbox Cover, 2500/3500 fits 2014–2018 Silverado and Sierra 1500 trucks and 2015–2020 Silverado and Sierra 2500/3500 trucks with a 6 ft 6 in bed. Check those fit details rather than relying on the shorter display name.

ACCESS designs it for most 19–21 in over-rail toolboxes. Confirm which box dimension that range refers to in the fit instructions, and compare your box's shape and lid clearance as well.

The cover uses hook-and-loop fastening and clamp-on, no-drill mounting. It sits 1.5 in above the bed rails, so consider that profile if you want a cover close to rail height.

Vinyl end seals, foam along the side rails, and added seals around the toolbox and rear corners address the joints where water can enter. ACCESS backs the cover with a 5-year limited warranty for workmanship defects under normal use.

Its buckle system holds the rolled cover away from the toolbox. Use that restraint whenever the cover is open, and check that the secured roll still leaves room to reach the box.

What should you measure before choosing?

Record the truck fit, toolbox dimensions, and space needed for both parts to move. A closed cover can look correct while hiding a lid or clamp conflict.

Use this checklist before ordering:

• Truck: make, model, model year, bed style, and bed length.
• Toolbox: width across the bed, depth from front to back, and height above and below the rails.
• Remaining bed: distance from the toolbox's rear edge to the inside of the closed tailgate.
• Mounting space: room beneath the rails for both sets of clamps or brackets.
• Moving parts: toolbox lid travel, cover release access, and space for the rolled or folded cover.

Measure the bed itself rather than estimating from the truck's overall size. Follow how to measure your truck bed for a tonneau cover for the basic reference points.

Include bed liners, rail caps, and existing accessories in your checks. They can change the surface a clamp grips or the space available around a bracket.

If you need to inspect hidden mounting points, use the steps in how to remove a tonneau cover. Keep removed hardware organized so you can identify which parts belong to each system.

How should you set up and check the combination?

Position both systems before final tightening, then check their full range of movement. Follow the installation order and fastening instructions supplied with each part.

Start with clean rail surfaces and inspect the places where seals will sit. Dirt, trapped debris, or uneven contact can leave gaps even when the cover looks straight.

Check these actions while the truck is parked:

1. Open the toolbox lid fully and reach its latch.
2. Release, open, and secure the cover.
3. Close both parts without forcing either one.
4. Open and close the tailgate.
5. Inspect the toolbox joint, corners, and side seals.

Watch for a lid rubbing the cover, a bracket pressing into fabric, or a clamp sitting partly off its intended surface. Correct the fit before driving or loading the box.

The clamp-on tonneau installation guide explains the general process. For attachment problems, read tonneau cover clamps and when to replace them.

How do you prevent leaks, wear, and blocked access?

Keep seals clean, secure the open cover, and leave clearance around moving parts. These habits help preserve the fit you established during installation.

Clear grit from the rail seals and toolbox joint during routine cleaning. Use cleaning products approved for the cover material, and avoid forcing a stiff latch or dragging cargo across the seals.

After installation or a mounting adjustment, check inside after rain for damp spots. Trace moisture to its entry point before adding seal material, since extra foam can interfere with closure or drainage.

A cover and toolbox create more joints than a cover alone. Read are tonneau covers waterproof? before storing moisture-sensitive tools or equipment in the bed.

Avoid 3 common mistakes: treating toolbox load capacity as cover capacity, stacking gear where it blocks the cover, and leaving the rolled cover unsecured. Keep heavy contents within the box's limit and secured against movement.

A soft cover mainly conceals cargo; it isn't a hard barrier against cutting. If theft resistance drives your choice, compare which tonneau covers are hardest to break into before settling on a setup.

Which toolbox and cover setup should you choose?

Choose your tonneau cover with toolbox storage around the part you need to keep. Then confirm the truck fit, mounting space, and opening path before ordering.

Keep a compatible existing roll-up cover and consider the TonneauMate if you need hidden tool storage with room below it. Keep an over-rail box and consider the 62199 once its exact fit is confirmed.

Choose the 62329 when your Silverado or Sierra falls within its specified fit and your toolbox meets its requirements. Its detailed sealing and roll restraints make it worth considering for that particular combination.

Before loading valuable gear, use the tonneau cover waterproofing guide to check the joints and understand the limits of weather protection.

Frequently asked questions

Can you use a tonneau cover with a toolbox?

Yes, when the toolbox and cover have compatible mounting points and enough opening clearance. Use a suspended box beneath a suitable cover, or a toolbox edition cover behind a compatible over-rail box.

Match the truck and bed first, then check that both the toolbox lid and cover can open.

What type of tonneau cover fits over a toolbox?

A compatible cover can sit above a suspended toolbox that stays below its rails and moving parts. A toolbox edition roll-up cover serves a different purpose: it covers the bed behind an over-rail box.

Choose based on the box position, then verify mounting clearance and access to its lid.

How do I measure for a toolbox tonneau cover?

Record the truck's model year, bed length, and bed style, then measure the toolbox's width, front-to-back depth, and height. Measure from the box's rear edge to the inside of the closed tailgate.

Also check lid travel, cover roll space, and room for clamps against the installation instructions.

Can a toolbox block a tonneau cover from opening?

Yes, a toolbox can obstruct the front rail, release hardware, folding panels, or rolled cover. Its lid can also hit cover hardware even when everything fits while closed.

Check the full movement of both parts before tightening the mounts, and secure the rolled cover as its instructions require.