Instrument cluster, trip odometer

Years 1963–79, 1998 Models 2 Factory citations 1

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Also described as Ignition lock light

Also documented for Buick Oldsmobile Pontiac

Documented applications

Impala / Full-Size

1963–70s (varies) Single-source

Malibu — Fifth generation (1997–2005)

1998 Factory-verified

platform-list code; the Malibu 1997–1999 kit order guides do not show it.

GM factory document — 1998 chevrolet malibu rpo code list, p.1.

This page aggregates every documented appearance of U23 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.