Wheels, 18" (45.7 cm), High gloss Black painted, machined-face aluminum

Years 2014–19, 2027 Models 3 Factory citations 8

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Also described as Wheels, 18 inch painted alloyWheels, 18 inch aluminum, black

Also documented for Cadillac

Documented applications

Impala — tenth generation (2014–2020)

2014–2016 Factory-verified

2014: 1SA, 2SA, 1LT, 2LT: S; 2015–2016: 1LT, 2LT, 3LT: S; also printed on the wheels page (p.6)

GM factory document — 2014 chevrolet impala fleet order guide wayback, p.3.
GM factory document — 2015 chevrolet impala fleet order guide wayback, p.3.
GM factory document — 2016 chevrolet impala fleet order guide wayback, p.3.

Silverado HD — K2XX (2015–2019)

2016–2019 Factory-verified

18 x 8 steel spare wheel; with the Midnight Edition and Alaskan packages; 2017: GM's 2017 Silverado 2500HD order guide; 2018: GM's 2018 Silverado 2500HD order guide; 2019: GM's 2019 Silverado 2500HD order guide

GM factory document — 2016 chevrolet silverado 2500hd fleet order guide wayback, p.3.
GM factory document — 2017 chevrolet silverado 2500hd order guide revised august 12 2016 copy gm authority, p.22.
GM factory document — 2018 chevrolet silverado 2500hd order guide copy gm authority, p.64.
GM factory document — 2019 chevrolet silverado 2500hd order guide april 20 2018 iteration 2 copy gm authority, p.64.

Traverse — Third generation (2024–2027)

2027 Factory-verified

Z71: S; LT, High Country, RS: not offered

GM factory document — 2027 chevrolet traverse fleet order guide, p.8.

This page aggregates every documented appearance of RT4 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.