R1 ● Confirmed

Buick · Regular Production Option

Power windows

Years 1970 Models 2

Documented applications

Full-Size — LeSabre / Electra / Wildcat →

• 1970 ● Confirmed

  Full-size

Skylark / GS →

• 1970 ● Confirmed

  Skylark 350 up, GS, GS 455

This page aggregates every documented appearance of R1 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.