Radian 3QXT › fit in › Chevrolet Colorado Crew Cab

Will the Diono Radian 3QXT fit in a 2015–2024 Chevrolet Colorado Crew Cab?

Yes — the Diono Radian 3QXT fits a 2015–2024 Chevrolet Colorado Crew Cab, with a caveat.
The Radian 3QXT is about 17" wide; the Colorado Crew Cab's usable rear bench is about 52". It fits one rear position comfortably. Three even fit across the back (51" needed vs 52"). Note: rear legroom here is limited, so a rear-facing install may crowd the front passenger.

17"Radian 3QXT width

52"Colorado Crew Cab rear bench

Yesthree across

★★★☆☆NHTSA Ease-of-Use

Check the Radian 3QXT on Amazon → All seats for a Colorado Crew Cab

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What fits this Colorado Crew Cab

One seat, rear position: Yes. The Radian 3QXT installs in an outboard rear position of a 2015–2024 Chevrolet Colorado Crew Cab, though you may slide the front seat forward for rear-facing.
Three across: Yes — three need ~51" against a ~52" bench. Test-fit; three-across is decided by half-inches.
Modes this seat covers: rear-facing → forward-facing → booster.
LATCH: lower anchors up to 40 lb; the Colorado Crew Cab has 3 lower-anchor positions.

ℹ️ Informational only — built from NHTSA public car-seat ratings and published seat/vehicle dimensions. This is not a safety certification and not a substitute for the seat and vehicle manuals. Always confirm the fit and install yourself before every trip. The Radian 3QXT's width (Diono published spec (17 in)) and the Colorado Crew Cab's rear-bench width (Typical for pickup — crew cab — approximate, verify install in your vehicle) are both approximate — confirm with a test-fit before buying.

Common questions

Will the Diono Radian 3QXT fit in a 2015–2024 Chevrolet Colorado Crew Cab?

Yes — the Diono Radian 3QXT (17" wide) fits a single rear seating position in a 2015–2024 Chevrolet Colorado Crew Cab. Because this vehicle has limited rear legroom, a rear-facing install may require sliding the front seat forward. Three of them also fit across its roughly 52" rear bench.

Can you fit three Radian 3QXTs across a Colorado Crew Cab?

Yes — three Radian 3QXTs need about 51" and the Colorado Crew Cab's usable bench is about 52". It's close, so test-fit before buying.

Sources: seat ratings & modes — NHTSA (pulled 2026-06-18); dimensions — manufacturer specs and owner measurements. Informational only — built from NHTSA public car-seat ratings and published seat/vehicle dimensions. This is not a safety certification and not a substitute for the seat and vehicle manuals. Always confirm the fit and install yourself before every trip.