General Motors option code
UO9 — Four Note Horn
UO9 (Four Note Horn): a General Motors factory option code recorded on 1 model across 1977–1986, with installs and price where a source states them.
1 model · 9 model years · 9 sources
Every sourced appearance
| Year | Model | As named that year | Price | Installs |
|---|---|---|---|---|
| 1977 | Buick Riviera | Four Note Horn order code (Buick option code) | $18 | Unknown |
| 1979 | Buick Riviera | Four Note Horn order code (Buick option code) | $23 | Unknown |
| 1980 | Buick Riviera | Four Note Horn order code (Buick option code) | $25 | Unknown |
| 1981 | Buick Riviera | Four Note Horn order code (Buick option code) | $24 | Unknown |
| 1982 | Buick Riviera | Four Note Horn order code (Buick option code) | $28 | Unknown |
| 1983 | Buick Riviera | Four Note Horn order code (Buick option code) | $28 | Unknown |
| 1984 | Buick Riviera | Four Note Horn order code (Buick option code) | $28 | Unknown |
| 1985 | Buick Riviera | Four Note Horn order code (Buick option code) | $28 | Unknown |
| 1986 | Buick Riviera | Four Note Horn order code (Buick option code) | $28 | 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.