K4Z ✓ Factory-verified

Chevrolet · Regular Production Option

Battery, auxiliary, 700 cold-cranking amps, 70 amp-hours

Years 2025–27 Models 1 Factory citations 3

Query this via API →

Also documented for GMC

Documented applications

Silverado HD (T1XX, 2020–2027) →

• 2025–2027 ✓ Factory-verified

  only in: 2500 HD, 3500 HD, 3500 HD chassis cab

  ⛭ GM factory document — 2025 chevrolet silverado 2500 hd retail and fleet fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 chevrolet silverado 2500 hd retail and fleet fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2027 chevrolet silverado 2500 hd retail and fleet fleet order guide rpo codes, p.1.

This page aggregates every documented appearance of K4Z in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.