Spare tire and wheel delete

Years 2013 Models 1

Also documented for Cadillac Chevrolet GMC

Documented applications

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

2013 Confirmed

deleted for 2014, replaced by 5A7 (GM's 2014 list)

This page aggregates every documented appearance of 6Y4 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.