5C4 Factory-verified

GMC · Regular Production Option

Front spring, high rate, upgrade, upfitter option

Years 2023, 2025–27 Models 1 Factory citations 7

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Also documented for Chevrolet

Documented applications

Savana — GMT610 (2003–2027)

2023, 2025–2027 Factory-verified

the 2023 Upfitter list reads Spring - Front Suspension, Computer Selected, Upgrade (SEO); O: Cargo TG33405, Cargo TG33705, Cutaway TG33803; not offered: Cargo TG23405, Cargo TG23705, Cutaway 2WT (2025–2026), Cutaway TG33503, Cutaway TG33903 (2025–2026); in the 2025–2027 guides only in the Cargo and Cutaway 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.39.
GM factory document — 2025 gmc savana cutaway fleet order guide, p.49.
GM factory document — 2026 gmc savana cargo fleet order guide, p.41.
GM factory document — 2026 gmc savana cutaway fleet order guide, p.53.
GM factory document — 2027 gmc savana cargo fleet order guide, p.38.
GM factory document — 2027 gmc savana cutaway fleet order guide, p.28.

This page aggregates every documented appearance of 5C4 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.