C7Y ✓ Factory-verified

Chevrolet · Regular Production Option

GVWR, 14,001 lb (6,350 kg)

Years 2004–05, 2025–26 Models 2 Factory citations 4

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Also described as GVW rating, 4,700 lbs

Also documented for GMC

Documented applications

Colorado — GMT355 (2004–2012) →

• 2004, 2005 ✓ Factory-verified
  ⛭ GM factory document — 2004 chevrolet colorado pickup 2wd rpo code list, p.1.

  ⛭ GM factory document — 2005 chevrolet colorado pickup 2wd rpo code list, p.1.

Silverado Medium Duty (GM515, 2019–2026) →

• 2025–2026 ✓ Factory-verified
  ⛭ GM factory document — 2025 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.

This page aggregates every documented appearance of C7Y in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.