91D ✓ Factory-verified

Chevrolet · Regular Production Option

Rear suspension, LiquidSpring prep, single volume (incomplete), 15,500 lb (7,031 kg)

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 prints 7673 kg

  ⛭ 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 91D in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.