General Motors option code
UM3
UM3: a General Motors factory option code reused for more than one part across 1979–1995 and 1 model — see the table for what it named each year, with installs and price where a source states them.
General Motors reused this code for more than one part over the years — read the "as named that year" column for what it meant on each row rather than assuming one meaning throughout.
1 model · 3 model years · 3 sources
Every sourced appearance
| Year | Model | As named that year | Price | Installs |
|---|---|---|---|---|
| 1979 | Buick Riviera | Signal Seeking CB & AM/FM Stereo Radio order code (Buick option code) | $524 | Unknown |
| 1980 | Buick Riviera | Signal Seeking CB & AM/FM Stereo w/Digital Clock (incl. antenna U83) order code (Buick option code) | $473 | Unknown |
| 1995 | Buick Riviera | Power loading CD Player and ETR AM Stereo/FM Stereo with Seek/Scan (Replaces Cassette) order code (Buick option code) | $244 | Unknown |
Every row traces to the source it links from on that model's own year page; this table only collects them in one place.