Tire, spare, LT305/70R18-126/123R, 35 inch M/T

Years 2025–27 Models 2 Factory citations 8

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Also documented for Chevrolet

Documented applications

Hummer EV SUV — BT1 (2024–2027)

2025–2026 Factory-verified

available only with the Extreme Off-Road Package (Z6X). 2025: O in 1SF, 1SG; 2026: O in 1SF, 1SG; not offered in 3VL.

GM factory document — 2025 gmc hummer ev suv fleet order guide, p.19.
GM factory document — 2026 gmc hummer ev suv fleet order guide, p.22.

Sierra HD — T1XX (2020–2027)

2025–2027 Factory-verified

only in: 2500 HD; AT4X: S; Pro, SLE, SLT, AT4, Denali, Denali Ultimate: not offered

GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide, p.10.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide, p.9.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide, p.8.

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