Q56 ● Confirmed

Buick · Regular Production Option

Wheels, 18 x 8, 13-spoke, painted alloy

Years 2012–13 Models 1

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Documented applications

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

• 2013 ● Confirmed

  deleted for 2014 (GM's 2014 list)

• 2012 ◑ Single-source

  no longer available on the 4GR69 models for 2013 (GM Authority 2013 changes); single-source: GM Authority 2013 changes does not credit GM

This page aggregates every documented appearance of Q56 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.