YK9 ✓ Factory-verified

GMC · Regular Production Option

Identification, not equipped with cylinder deactivation

Years 2023 Models 1 Factory citations 1

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Documented applications

Sierra — T1XX (2019–2026) →

• 2023 ✓ Factory-verified internal
  ⛭ GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.16.

This page aggregates every documented appearance of YK9 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.