5A1 ✓ Factory-verified

GMC · Regular Production Option

HVAC provisions, rear A/C control head

Years 2023, 2025–27 Models 1 Factory citations 4

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Also documented for Chevrolet

Documented applications

Savana — GMT610 (2003–2027) →

• 2023, 2025–2027 ✓ Factory-verified

  the 2025–2027 guides describe a kit shipped loose (rear air conditioning control head, retainer and bezel) for installation after upfit; O on all trims; in the 2025–2027 guides only in the Cargo guides

  ⛭ GM factory document — 2023 chevrolet 23 express savana body builder sm en us 2022sep13, p.12.

  ⛭ GM factory document — 2025 gmc savana cargo fleet order guide, p.37.

  ⛭ GM factory document — 2026 gmc savana cargo fleet order guide, p.39.

  ⛭ GM factory document — 2027 gmc savana cargo fleet order guide, p.36.

This page aggregates every documented appearance of 5A1 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.