T63 ● Confirmed

Buick · Regular Production Option

Headlamps-on indicator

Years 1987 Models 1

Query this via API →

Also documented for ChevroletGMCPontiac

Documented applications

Regal — G-body (1983–1987) →

• 1987 ● Confirmed

  gnttype.org's 1987 option sheet

This page aggregates every documented appearance of T63 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.