- 1970s Single-source
Also described as Deluxe interior ornamentationCustom interiorInterior, customCustom interior package
Also documented for BuickCadillacOldsmobilePontiac
Documented applications
- 1988–1990 Factory-verified
standard on the GT (Z21); the 1991–1994 convenience pages still name B18 in a footnote while the 1991–1993 option-weight pages list B19; a GM parts code list reads B18 as deluxe interior ornamentation
GM Heritage factory kit — 1988 Chevrolet Beretta, p.33.GM Heritage factory kit — 1989 Chevrolet Beretta, p.33.GM Heritage factory kit — 1990 Chevrolet Beretta, p.71.
- 1982–1988 Factory-verified
1982 from the color and trim page heading (printed BI8); 1983 from the seat footnote 'Available only as part of Custom Interior (RPO B18)' on the data book option page; 1984-1987 from the roof console (DK6) weight entries requiring RPO-B18 (or BS1), with the custom interior offered on those years' option pages; 1988 from a note requiring RPO B18
GM Heritage factory kit — 1982 Chevrolet Camaro, p.27.GM Heritage factory kit — 1983 Chevrolet Camaro, p.14.GM Heritage factory kit — 1984 Chevrolet Camaro, p.95.GM Heritage factory kit — 1985 Chevrolet Camaro, p.93.GM Heritage factory kit — 1986 Chevrolet Camaro, p.97.GM Heritage factory kit — 1987 Chevrolet Camaro, p.115.GM Heritage factory kit — 1988 Chevrolet Camaro, p.30.
- 1995 Factory-verified
the weight sheets word it deluxe interior ornamentation; the 1995 trim chart ties the leather and some custom cloth trims to it; the 1995 sedan guide prints 818; 1996 is not claimed: the 1996 weight sheet (p.112) prints B18 with no description and no 1996 page defines it
GM Heritage factory kit — 1995 Chevrolet Caprice, p.8.GM Heritage factory kit — 1995 Chevrolet Caprice, p.195.
- 1988–1990 Factory-verified
the optional custom cloth trim; 1990: the option-weight page entry is backed by the order guide, which prices the custom cloth CL bucket trim (F**2) for 1LT68 and 1LT69 (the same seat as the A78 row); later years print B18 only in footnotes ("Available in optional custom interior (RPO B18)" on the 1990–1994 convenience pages, "Corsica LTZ & B18 optional trim receive 60/40 seat" 1990–1996), so they are not claimed; the 1991–1992 option-weight pages list B19; same description as beretta-gen1
GM Heritage factory kit — 1988 Chevrolet Corsica, p.31.GM Heritage factory kit — 1989 Chevrolet Corsica, p.47.GM Heritage factory kit — 1990 Chevrolet Corsica, p.53.
- 2000–2004 Factory-verifiedGM Heritage factory kit — 2000 Chevrolet Impala, p.42.GM Heritage factory kit — 2004 Chevrolet Impala, p.29.
- 2000–2004 Factory-verified
- 2000–2005 Factory-verified
This page aggregates every documented appearance of B18 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.