Heavy-duty cooling (extra-HD radiator, thermo fan drive, 55A Delcotron; N.A. with A1)

Years 1970 Models 2

Also described as Heavy-duty cooling

Documented applications

Full-Size — LeSabre / Electra / Wildcat

1970 Confirmed

All full-size

Skylark / GS

1970 Confirmed

All intermediates

This page aggregates every documented appearance of I-7 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.