Featured here: the UWS UWS EC10473 69-inch Heavy-Wall Aluminum Crossover.
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How we know:Spec-verifiedOwner-report-verifiedWhat these mean
A full-size crossover tool box fits a Silverado 1500 — in practice the 69-inch or 72-inch size class. UWS publishes the Silverado's exterior bed rail width as about 64 inches, and full-size boxes are designed around figures in that range.
Measure outside-to-outside across the top of your bed rails nearest the cab. About 64 inches puts you in full-size crossover territory, and essentially the whole market is open.
Why the box is longer than your bed is wide
A crossover box's advertised length includes its end caps, which overhang the rails rather than sitting between them. The mounting requirement is at least 1.5 inches of box resting on each rail, so the box is necessarily longer than the span it bridges. A 69-inch box on a 64-inch rail width is correct.
Which means do not try to match the numbers. Take the measurement, then check it against the box manufacturer's fitment chart for your truck and year.
The four-minute check
Exterior bed rail width. Outside to outside across the top of the rails, nearest the cab, tape taut. Expect about 64 in.
Interior wheelhousing width. Chevrolet publishes 50.63 in; measure yours with the liner in.
Vertical bed depth. Chevrolet publishes 22.4 in box height.
Which truck you have. On a 2019, establish whether it is the new body style or the Classic. This matters more than any dimension.
What changes by bed length
Silverado 1500 floor length remaining behind a standard-depth crossover box.
Bed
Floor length
A 19 in deep box leaves
Our take
Short
69.92 in
about 51 in of floor
More forgiving than an F-150 short bed
Standard
79.44 in
about 60 in of floor
Comfortable
Long
98.18 in
about 79 in of floor
Buy whatever box you want
The Silverado's short bed at 69.92 inches gives you about three more inches behind a box than an F-150 short bed does, which is enough that a standard-depth crossover is a defensible choice here where it is marginal on the Ford.
Heavy-wall aluminum, a foam-filled RigidCore lid that does not flex when you sit on it, and a low profile that still clears most rear glass. This is the crossover to buy if you intend to keep the truck.
Who should skip it. Skip it on a 5'5" short bed. At 69 inches it will sit on the rails, but you lose a disproportionate share of a short bed and the money is better spent on a side-mount pair.
Build
9.4
Weather seal
8.8
Security
8.6
Bed usability
8.0
Value
7.4
What works
+Foam-filled lid does not oil-can under body weight
+Low profile clears rear glass on most full-size crew cabs
+Heavy-wall extrusion survives being used as a step
+Gas struts are serviceable rather than sealed units
What does not
−Among the most expensive aluminum crossovers on the shelf
−69 in is a full-size length — not a mid-size answer
A 70 x 19 x 14 in gloss black aluminum single-lid box at a price the premium brands do not touch. You give up some lid rigidity; you keep most of the useful volume.
Who should skip it. Not the one if you plan to stand on the lid daily — the panel is thinner than UWS's foam-filled RigidCore and will flex. Buy the UWS or a saddle box instead.
Build
8.0
Weather seal
7.8
Security
7.6
Bed usability
8.2
Value
9.2
What works
+Full 19 in of depth — a framing square lies flat
+Gloss finish wipes clean; dust does not show the way matte does
+Priced well below the premium aluminum boxes
What does not
−Lid flexes under weight compared with foam-filled designs
−14 in height can crowd rear glass on lowered or small-cab trucks
−Latch hardware is the first thing owners report replacing
The narrow-body crossover. It eats noticeably less fore-aft bed length than a standard 19-20 in box, which is the whole point on a 5'5" or 5'7" bed where every inch in front of the wheel wells matters.
Who should skip it. If you carry long power tools in cases, the narrow body will fight you. A 19 in box swallows a circular saw case flat; this one does not.
Build
7.6
Weather seal
7.4
Security
7.2
Bed usability
9.2
Value
8.8
What works
+Gives back several inches of bed floor versus a standard-width box
+Light enough for a one-person install
+Cheapest route into a real aluminum crossover
What does not
−Narrow interior will not take large tool cases flat
−Thinner material than the heavy-wall boxes
−Published dimensions vary by listing — measure before you order
A 72 x 13 x 16 in aluminum topsider that bolts along the bed rail and leaves the floor completely clear. For anyone who hauls sheet goods or a pallet, this is the right shape of tool box and a crossover is the wrong one.
Who should skip it. It consumes rail space, so a tonneau cover and a bed rack both get complicated. If a cover is non-negotiable, go crossover and give up the floor instead.
Build
9.0
Weather seal
8.4
Security
8.2
Bed usability
9.6
Value
7.6
What works
+Bed floor stays completely usable
+Long and shallow suits hand tools and cordless kits better than a deep well
+Buyers parts and latches are stocked everywhere
What does not
−Requires drilling the bed rail on most trucks
−Blocks a tonneau cover and most bed racks
−One box covers one side only — pairs get expensive
Full-size beds with 72 in or more of straight rail
Trucks that haul flat loads on the bed floor
✗ Does not fit
Mid-size beds
Trucks running a tonneau cover or bed rack
Three things that are not about size
Clamp or drill. Clamp kits hold a crossover box on a Silverado with no holes. See installing without drilling.
Cover compatibility. A box plus a cover needs a slimline box or a notched cover, and on a 2019 truck the cover is body-style specific. See does a tool box fit under a tonneau cover.
Rack compatibility. The GM cover-compatible bed rack systems are the most available of any truck, which changes the rack-versus-box calculation. See bed racks.
Questions people actually ask
What size toolbox fits a Chevy Silverado 1500?
A full-size crossover in the 69 or 72 inch class. The Silverado's exterior bed rail width is about 64 inches and those boxes are built around it. Confirm against your measurement and the manufacturer's fitment chart.
Will a 72 inch tool box fit a Silverado?
Generally yes — 72 in is a standard full-size class with plenty of Silverado-fitment options. The longer box overhangs a little further. Check the fitment chart for your year, and on a 2019 truck establish whether it is new body or Classic first.
How much bed space does a tool box take on a Silverado short bed?
A standard 19-inch-deep crossover leaves about 51 in of the 69.92 in floor. That is about three inches more than an F-150 short bed gives you, which is enough that a standard-depth box is a reasonable choice here.
Does the 2019 body-style split affect tool boxes?
Less than it affects covers and liners, because a crossover box clamps to the rail lip rather than sealing to a profile. But clamp kits are sometimes listed per body style, so check — and for anything else that mounts to the bed, the split matters a great deal.
Do I need to drill a Silverado to fit a tool box?
No. Clamp kits grip the bed rail lip and hold the box firmly without holes, and the box comes off cleanly at resale. Step-by-step.
Last reviewed October 5, 2026. Think a figure here is wrong? Tell us at contact@toolboxandtruck.com and we will check it, fix it and date the correction — see our editorial policy.
