5F1 ✓ Factory-verified

GMC · Regular Production Option

Calibration, suppression, engine oil change indicator, with fuel information

Years 2023 Models 1 Factory citations 1

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Also documented for Chevrolet

Documented applications

Savana — GMT610 (2003–2027) →

• 2023 ✓ Factory-verified internal
  ⛭ GM factory document — 2023 chevrolet 23 express savana body builder sm en us 2022sep13, p.12.

This page aggregates every documented appearance of 5F1 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.