General Motors option code
NA6
NA6: a General Motors factory option code reused for more than one part across 1977–1984 and 7 models — 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.
7 models · 6 model years · 6 sources
Every sourced appearance
| Year | Model | As named that year | Price | Installs |
|---|---|---|---|---|
| 1977 | Buick Riviera | High Altitude Emission System order code (Buick option code) | $22 | Unknown |
| 1977 | Chevrolet Chevelle and Malibu SS | High-altitude emission equipment RPO | $22 | Unknown |
| 1977 | Chevrolet Chevy II and Nova | High-altitude emission equipment RPO | $22 | Unknown |
| 1977 | Chevrolet El Camino SS | High-altitude emission equipment RPO | $22 | Unknown |
| 1977 | Pontiac Firebird and Trans Am | High Altitude Performance Option RPO/UPC | $22 | Unknown |
| 1978 | Chevrolet Chevy II and Nova | High-altitude emission equipment RPO | $33 | Unknown |
| 1978 | Chevrolet El Camino SS | High-altitude emission equipment (LM1 with MX1 only) RPO | $33 | Unknown |
| 1978 | Pontiac Firebird and Trans Am | High Altitude Emissions Requirements RPO/UPC | $33 | Unknown |
| 1979 | Chevrolet Chevy II and Nova | High-altitude emission equipment RPO | $35 | Unknown |
| 1979 | Chevrolet El Camino SS | High-altitude emission equipment (LM1 with MX1 only) RPO | $35 | Unknown |
| 1979 | Pontiac Grand Prix | Altitude emissions (designed and recommended for high-altitude operation) UPC | Unknown | Unknown |
| 1979 | Pontiac Tempest and LeMans | Altitude emission equipment UPC | Unknown | Unknown |
| 1982 | Buick Riviera | High Altitude Emission system (LF9 req) -w/o Cold Climate Pkg Delete N.E.C. w/cold climate pkg. delete order code (Buick option code) | $49 | Unknown |
| 1983 | Buick Riviera | High Altitude Emission system (LF9 req) -w/o Cold Climate Pkg Delete N.E.C. -w/cold climate pkg. delete order code (Buick option code) | $49 | Unknown |
| 1984 | Buick Riviera | High Altitude Emission system (LF9 req) -w/o Cold Climate Pkg Delete N.E.C. -w/cold climate pkg. delete order code (Buick option code) | $49 | 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.