B4K Factory-verified

Chevrolet · Regular Production Option

Radio, electronically tuned AM/FM stereo, seek-scan, digital clock, extended range sound system

Years 1985–86 Models 1 Factory citations 2
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Documented applications

This page aggregates every documented appearance of B4K in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.