Ship thru, produced in Wentzville and shipped to Reading Equipment, St. Clair, MO and returned to Wentzville Assembly for final shipment

Years 2025–27 Models 2 Factory citations 12

Query this via API →

Also described as Ship thru, produced in Wentzville and shipped to Caseco Truck Body

Also documented for Chevrolet

Documented applications

Canyon — Third generation (VSS-T) (2023–2027)

2025–2027 Factory-verified internal

; 2025: Elevation, AT4: O; Denali: not offered; 2026–2027: Elevation, AT4: O; AT4X, Denali: not offered

GM factory document — 2025 gmc canyon fleet order guide, p.45.
GM factory document — 2026 gmc canyon fleet order guide, p.61.
GM factory document — 2027 gmc canyon fleet order guide, p.62.

Savana — GMT610 (2003–2027)

2025–2027 Factory-verified internal

; O: Cargo 1WT, Cutaway 1WT (2027), Cutaway TG33503 (2025–2026), Cutaway TG33803 (2025–2026), Passenger 1LS, Passenger 1LT; not offered: Cutaway 2WT (2025–2026), Cutaway TG33903 (2025–2026)

GM factory document — 2025 gmc savana cargo fleet order guide, p.41.
GM factory document — 2025 gmc savana cutaway fleet order guide, p.50.
GM factory document — 2025 gmc savana passenger fleet order guide, p.32.
GM factory document — 2026 gmc savana cargo fleet order guide, p.43.
GM factory document — 2026 gmc savana cutaway fleet order guide, p.54.
GM factory document — 2026 gmc savana passenger fleet order guide, p.33.
GM factory document — 2027 gmc savana cargo fleet order guide, p.40.
GM factory document — 2027 gmc savana cutaway fleet order guide, p.29.
GM factory document — 2027 gmc savana passenger fleet order guide, p.31.

This page aggregates every documented appearance of WI6 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.