GR3 ✓ Factory-verified

Chevrolet · Regular Production Option

Rear suspension, 11,000 lb (4,990 kg), multi-leaf

Years 2025–26 Models 1 Factory citations 2

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Documented applications

Silverado Medium Duty (GM515, 2019–2026) →

• 2025–2026 ✓ Factory-verified

  the list omits the unit after 11,000

  ⛭ 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 GR3 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.