Seat back adjuster, manual, driver and passenger, reclining

Years 1983–89, 1998 Models 5 Factory citations 17

Query this via API →

Also described as Seat backs, reclining, left-hand and right-hand

Also documented for Buick Chevrolet Oldsmobile

Documented applications

Jimmy — second generation (1995–2001)

1998 Factory-verified

GM factory document — 1998 gmc jimmy 4wd rpo code list, p.1.

Jimmy — first generation (1983–1994)

1983–1984, 1986, 1988–1989 Factory-verified

included with YC3; shared S/T platform code; cited from the joint S-10/15 Blazer/Jimmy pages of the S-10 Blazer kit

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 — 1986 Chevrolet S 10 Blazer, p.9.
GM Heritage factory kit — 1988 Chevrolet S 10 Blazer, p.9.
GM Heritage factory kit — 1989 Chevrolet Blazer, p.18.

Safari — First generation (1985–1994)

1986–1988 Factory-verified

the pages print seat back recliner and dual armrests, for the high back front seats; shared M-body code; cited from the joint Astro/Safari pages of the Astro kits.

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.

Sonoma — first generation (1982–1993)

1983–1989 Factory-verified

shared S-series code; cited from the joint S-10/S-15 pages of the S-10 kits

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.35.
GM Heritage factory kit — 1989 Chevrolet S 10, p.24.

Sonoma — second generation (1994–2004)

1998 Factory-verified

GM factory document — 1998 gmc sonoma pickup 4wd rpo code list, p.1.

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