General Motors option code

A20  — Swing-out rear side windows

A20 (Swing-out rear side windows): a General Motors factory option code recorded on 2 models across 1964–1979, with installs and price where a source states them.

2 models · 7 model years · 2 sources

Dark green 1964 Chevrolet Chevelle Malibu SS two-door hardtop at an outdoor car show in Australia, front three-quarter, with Chevelle fender script and Malibu SS emblem on the rear quarter
1964 Chevrolet Chevelle Malibu SS sport coupe in dark green Photo: Sicnag, CC BY 2.0, via Wikimedia Commons

Every sourced appearance

Year Model As named that year Price Installs
1964 Chevrolet Chevelle and Malibu SS Seat Belts, custom (Discontinued February, 1964) RPO $10.80 449 Reported
1973 Chevrolet Chevelle and Malibu SS Swing-out rear windows RPO Unknown 4,336 Reported
1975 Chevrolet Chevy II and Nova Swing-out rear side windows RPO $44 Unknown
1976 Chevrolet Chevy II and Nova Swing-out rear side windows RPO $48 Unknown
1977 Chevrolet Chevy II and Nova Swing-out rear side windows RPO $52 Unknown
1978 Chevrolet Chevy II and Nova Swing-out rear side windows RPO $56 Unknown
1979 Chevrolet Chevy II and Nova Swing-out rear side windows RPO $59 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.