KX4 ✓ Factory-verified

GMC · Regular Production Option

Alternator, 250 amps

Years 2022–23, 2025–27 Models 3 Factory citations 12

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Also documented for CadillacChevrolet

Documented applications

Sierra 1500 — Next-Generation (2027) →

• 2027 ✓ Factory-verified

  Pro, Elevation 3SB: O; Elevation 3VL: not offered; AT4, AT4X, Denali, Denali Ultimate: included in the trim group

  ⛭ GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.22.

  ⛭ GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Yukon — T1XX (2021–2027) →

• 2022–2023, 2025–2027 ✓ Factory-verified

  2027: O on all trims

  ⛭ GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.11.

  ⛭ GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.11.

  ⛭ GM factory document — 2025 gmc new yukon denali fleet order guide, p.70.

  ⛭ GM factory document — 2026 gmc yukon denali fleet order guide, p.76.

  ⛭ GM factory document — 2027 gmc yukon fleet order guide, p.66.

Yukon XL — T1XX (2021–2027) →

• 2022–2023, 2025–2027 ✓ Factory-verified

  2027: O on all trims

  ⛭ GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.11.

  ⛭ GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.11.

  ⛭ GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.76.

  ⛭ GM factory document — 2026 gmc yukon xl denali fleet order guide, p.77.

  ⛭ GM factory document — 2027 gmc yukon xl fleet order guide, p.68.

Related codes · mentioned in these notes

3SB3VL

This page aggregates every documented appearance of KX4 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.