Light monitoring system

Years 1963–79 Models 3 Factory citations 4

Also described as Lamp MonitoringLamp monitoring

Documented applications

Camaro

1968–1969 Factory-verified

GM Heritage factory kit — 1968 Chevrolet Camaro, p.44.
GM Heritage factory kit — 1969 Chevrolet Camaro, p.46.

Chevelle / El Camino

1967–1970 Factory-verified

GM Heritage factory kit — 1968 Chevrolet Chevelle, p.10.
GM Heritage factory kit — 1970 Chevrolet Chevelle, p.85.

Impala / Full-Size

1963–70s (varies) Confirmed

This page aggregates every documented appearance of U46 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.