Tire, spare, LT235/80R17E all-terrain

Years 2014, 2016–19, 2023, 2025–26 Models 3 Factory citations 8

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Also described as Tire, spare, LT235/80R17E, all-terrain, with steel spare wheel

Also documented for GMC

Documented applications

Silverado HD — GMT900 (2007–2014)

2014 Factory-verified

with QZT; the spare wheel does not match the road wheels

GM factory document — 2014 chevrolet silverado 3500hd cc fleet order guide wayback, p.3.

Silverado HD — K2XX (2015–2019)

2016–2019 Factory-verified

only in: 3500HD; 2017: GM's 2017 Silverado 3500HD order guide; 2018: GM's 2018 Silverado 3500HD order guide; 2019: GM's 2019 Silverado 3500HD order guide

GM factory document — 2016 chevrolet silverado 3500hd fleet order guide wayback, p.3.
GM factory document — 2017 chevrolet silverado 3500hd order guide revised august 12 2016 copy gm authority, p.19.
GM factory document — 2018 chevrolet silverado 3500hd order guide copy gm authority, p.31.
GM factory document — 2019 chevrolet silverado 3500hd order guide april 20 2018 copy gm authority, p.29.

Silverado HD (T1XX, 2020–2027)

2023, 2025–2026 Factory-verified

only in: 3500 HD, 3500 HD chassis cab

GM factory document — 2023 chevrolet 23silverado 2500 3500hd electrical body builder sm en us 2022oct12, p.15.
GM factory document — 2025 chevrolet silverado 3500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet silverado 3500 hd retail and fleet fleet order guide rpo codes, p.1.

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