SiriusXM satellite radio and HD Radio

Years 2014, 2018–19 Models 2 Factory citations 3

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Also described as Audio system, SiriusXM and HD Radio

Also documented for Cadillac Chevrolet GMC

Documented applications

Regal — E2XX (2018–2020)

2018–2019 Factory-verified

2019: Avenir: S; Preferred, Preferred II, Essence, GS: O (2019 Sportback order guide); the 2019 guide reads HD Radio only

GM factory document — 2018 buick regal sportback fleet order guide wayback, p.1.
GM factory document — 2018 buick regal tourx fleet order guide wayback, p.1.
GM factory document — 2019 buick regal sportback order guide copy gm authority, p.2.

Regal — Epsilon II, 5th gen (2011–2017)

2014 Confirmed

new for 2014 (GM's 2014 list); replaced by U2K for 2015 (GM's 2015 list)

This page aggregates every documented appearance of U2M in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.