SwingCase Colorado & Canyon Fitment 2026 — SC103, SC104, SC107

By Cole Briggs, Founder & Editor — Updated: October 30, 2026

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SwingCase Codes for Colorado and Canyon

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Chevrolet Colorado Fitment Details

The Chevrolet Colorado is a mid-size truck available in Extended Cab and Crew Cab configurations. SC103 and SC104 are confirmed across the two most recent generations:

Note: there is no Colorado production gap between Gen 1 and Gen 2 — the model was discontinued after 2012 and relaunched for 2015, skipping 2013–2014 entirely. If you own a 2004–2012 Colorado, use UnderCover's fitment tool; the older rail geometry may not be compatible with SC103/SC104.

GMC Canyon Fitment Details

The GMC Canyon shares its platform and bed architecture with the Chevrolet Colorado across all three generations. SC103 and SC104 coverage mirrors the Colorado exactly:

The Canyon Denali has a distinct rail cap profile — similar in principle to the Sierra Denali's SC105 situation on the Silverado/Sierra platform. If you have a Canyon Denali, use UnderCover's fitment tool with "GMC Canyon Denali" specifically rather than assuming SC103/SC104. The Denali's chrome rail cap with a different profile geometry is a real-world difference that can affect bracket fitment.

SC107 — Specific Configuration Code

SC107 appears in UnderCover's lineup for the Colorado/Canyon cluster. The specific application is not publicly documented in detail — it likely covers a particular cab, bed, or trim combination for the 2023+ 3rd gen or a Canyon-specific variant that falls outside the SC103/SC104 bracket geometry.

If you run UnderCover's fitment tool and it returns SC107 for your vehicle, that is the correct code to order. Do not substitute SC103 or SC104 in its place — codes within the same cluster are not interchangeable across applications. The fitment tool is the authoritative source for which code your specific year, cab, and trim requires.

Shared Code with the Silverado — Why SC103 and SC104 Appear on Both Pages

SC103 and SC104 are shared codes that cover both the Chevrolet Colorado / GMC Canyon mid-size platform and the Chevrolet Silverado 1500 short bed (5'8"). This doesn't mean the trucks are the same — the code works on both because the bracket mounting geometry at the rail cap is compatible across both platforms.

The Colorado/Canyon bed floor is shorter than the Silverado short bed overall, but the rail profile at the mounting point is similar enough that UnderCover engineered SC103/SC104 to cover both. This is why the Silverado/Sierra fitment page mentions Colorado/Canyon in a footnote — they are genuinely the same part number.

Colorado and Canyon Bed Lengths

All standard Colorado and Canyon cab/bed combinations are covered by SC103/SC104 (Gen 2/3). Unlike the Silverado platform, there is no bed-length-dependent code split for the Colorado/Canyon — SC103/SC104 cover all configurations in the confirmed year range.

Install Notes for Colorado and Canyon

ZR2 and AT4X suspension lift

The Colorado ZR2 and Canyon AT4X come with raised suspension and widened bodywork, but the bed and rail cap geometry are identical to the standard Colorado/Canyon of the same generation. The suspension lift does not affect rail cap mounting. SC103 (driver) and SC104 (passenger) are the correct codes for ZR2 and AT4X in the Gen 2 and Gen 3 year range.

Spray-in bedliner

Spray-in bedliners are common on Colorado Z71 and ZR2 trims — either factory-applied or dealer-installed. If your liner covers the inside top face of the bed rail wall, remove the coating at each of the six screw locations before drilling. Use a rotary tool and remove only the area at each screw footprint. Drop-in rubber mats do not cause this issue. Full install detail at the SwingCase install guide.

Tonneau cover compatibility

SC103/SC104 are compatible with most tonneau covers given the 3-inch clearance rule between the SwingCase lid and the closed cover. BakFlip (MX4, F1), Extang (Solid Fold 2.0, Trifecta 2.0), and most soft roll-up covers are confirmed compatible on the Colorado/Canyon platform. Retrax covers should be measured before ordering — clearance varies by tonneau series and the Colorado/Canyon's lower rail profile compared to full-size trucks. The 5 ft Crew Cab bed has less positioning margin than the 6 ft Extended Cab bed — confirm clearance at full swing before drilling.

First-gen Colorado and Canyon (2004–2012)

The Gen 1 Colorado and Canyon (2004–2012) have an older rail geometry that may not be compatible with SC103/SC104. UnderCover's fitment tool is the authoritative source for Gen 1 coverage. Do not assume SC103/SC104 transfers from the Gen 2 to the Gen 1 platform.

Frequently Asked Questions