Seat back adjuster, manual, driver and passenger, reclining

Years 1983–94, 1998 Models 8 Factory citations 31

Also described as Seat adjuster, front passenger, mechanical, 4 waySeat backs, reclining, left-hand and right-handReclining driver and passenger seatbacks

Also documented for Buick GMC Oldsmobile

Documented applications

Astro — First generation (1985–1994)

1986–1988, 1991–1994 Factory-verified

the kit pages print seat back recliner and dual armrests, for the high back front seats.

GM Heritage factory kit — 1986 Chevrolet Astro Van, p.15.
GM Heritage factory kit — 1987 Chevrolet Astro Van, p.28.
GM Heritage factory kit — 1988 Chevrolet Astro Van, p.9.
GM Heritage factory kit — 1991 Chevrolet Astro Van, p.12.
GM Heritage factory kit — 1992 Chevrolet Astro Van, p.13.
GM Heritage factory kit — 1993 Chevrolet Astro Van, p.13.
GM Heritage factory kit — 1994 Chevrolet Astro Van, p.11.

Beretta — L-body (1987–1996)

1988 Factory-verified

the merged Celebrity doc and the rparts GM RPO PDF read A78 as reclining driver and passenger seatbacks

GM Heritage factory kit — 1988 Chevrolet Beretta, p.33.

S-10 Blazer — First generation (1983–1994)

1983–1989 Factory-verified

included with YC3; the merged second-generation doc writes Seat back adjuster, manual, driver and passenger, reclining

GM Heritage factory kit — 1983 Chevrolet S 10 Blazer, p.8.
GM Heritage factory kit — 1984 Chevrolet S 10 Blazer, p.10.
GM Heritage factory kit — 1985 Chevrolet S 10 Blazer, p.33.
GM Heritage factory kit — 1986 Chevrolet S 10 Blazer, p.9.
GM Heritage factory kit — 1987 Chevrolet S 10 Blazer, p.17.
GM Heritage factory kit — 1988 Chevrolet S 10 Blazer, p.9.
GM Heritage factory kit — 1989 Chevrolet Blazer, p.18.

Blazer — S-10 second generation (1995–2005)

1998 Factory-verified

GM factory document — 1998 chevrolet blazer 4wd rpo code list, p.1.

Celebrity — A-body (1982–1990)

1984–1985, 1988–1989 Factory-verified

Included with AR9 bucket seats; 1989: requires 55/45 or 45/45 seats; 1986–1987 are not claimed: no dated page of those years prints the code as an entry of its own

GM Heritage factory kit — 1984 Chevrolet Celebrity, p.39.
GM Heritage factory kit — 1985 Chevrolet Celebrity, p.41.
GM Heritage factory kit — 1988 Chevrolet Celebrity, p.44.
GM Heritage factory kit — 1989 Chevrolet Celebrity, p.67.

Corsica — L-body (1987–1996)

1988–1990 Factory-verified

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 and gives 4-way mechanical driver and passenger adjusters with the custom cloth and LTZ seats; 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.

S-10 pickup — First generation (1982–1993)

1983–1989 Factory-verified

GM Heritage factory kit — 1983 Chevrolet S 10, p.30.
GM Heritage factory kit — 1984 Chevrolet S 10, p.19.
GM Heritage factory kit — 1985 Chevrolet S 10, p.24.
GM Heritage factory kit — 1986 Chevrolet S 10, p.17.
GM Heritage factory kit — 1987 Chevrolet S 10, p.23.
GM Heritage factory kit — 1988 Chevrolet S 10, p.20.
GM Heritage factory kit — 1989 Chevrolet S 10, p.24.

S-10 pickup — Second generation (1994–2004)

1998 Factory-verified

GM factory document — 1998 chevrolet s10 pickup 4wd rpo code list, p.1.

This page aggregates every documented appearance of A78 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.