Speaker system, Concert Sound

Years 1987 Models 1

Documented applications

Regal — G-body (1983–1987)

1987 Confirmed

requires UM6, UM7 or UX1; gnttype.org's 1987 option sheet

This page aggregates every documented appearance of UW4 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.