Window, rear door, swing out

Years 1983–84, 1986–89, 1998–10, 2014–18, 2022–27 Models 5 Factory citations 37

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Also documented for Chevrolet

Documented applications

Safari — First generation (1985–1994)

1986–1988 Factory-verified

1989 is left out: the 1989 option chart prints A18Rear run together, a form check-doc does not accept; shared M-body code; cited from the joint Astro/Safari pages of the Astro kits.

GM Heritage factory kit — 1986 Chevrolet Astro Van, p.13.
GM Heritage factory kit — 1987 Chevrolet Astro Van, p.27.
GM Heritage factory kit — 1988 Chevrolet Astro Van, p.7.

Safari — Second generation (1995–2005)

1998–2003 Factory-verified

GM factory document — 1998 gmc safari 2wd rpo code list, p.1.
GM factory document — 1999 gmc safari 2wd rpo code list, p.1.
GM factory document — 2000 gmc safari 2wd rpo code list, p.1.
GM factory document — 2001 gmc safari 2wd rpo code list, p.1.
GM factory document — 2002 gmc safari 2wd rpo code list, p.1.
GM factory document — 2003 gmc safari 2wd rpo code list, p.1.

Savana — GMT600 (1996–2002)

1998–2002 Factory-verified

GM factory document — 1998 gmc savana rpo code list, p.1.
GM factory document — 1999 gmc savana rpo code list, p.1.
GM factory document — 2000 gmc savana rpo code list, p.1.
GM factory document — 2001 gmc savana rpo code list, p.1.
GM factory document — 2002 gmc savana rpo code list, p.1.

Savana — GMT610 (2003–2027)

2003–2010, 2014–2018, 2022–2027 Factory-verified

the 2025–2027 guides read Glass, swing-out rear cargo door windows; S: Passenger 1LS, Passenger 1LT; O: Cargo 1WT; in the 2025–2027 guides only in the Cargo and Passenger guides

GM factory document — 2003 gmc savana rpo code list, p.1.
GM factory document — 2008 gmc savana rpo code list, p.1.
GM factory document — 2008 chevrolet ld electricalfullsizevans, p.15.
GM factory document — 2009 gmc savana rpo code list, p.1.
GM factory document — 2009 chevrolet ld electricalfullsizevans 100813, p.13.
GM factory document — 2010 chevrolet gh van elec 1 7 d1 100813, p.13.
GM factory document — 2014 chevrolet gh van elec bbm si brief, p.5.
GM factory document — 2018 chevrolet 18 express savana bodybuilders sm 2017nov06, p.14.
GM factory document — 2022 chevrolet 22 express savana electrical body builder sm en us 2021oct12, p.12.
GM factory document — 2025 chevrolet my25 express savana electrical bbm, p.10.
GM factory document — 2025 gmc savana cargo fleet order guide, p.28.
GM factory document — 2025 gmc savana passenger fleet order guide, p.20.
GM factory document — 2026 chevrolet my26 express savana electrical bbm, p.10.
GM factory document — 2026 gmc savana cargo fleet order guide, p.30.
GM factory document — 2026 gmc savana passenger fleet order guide, p.22.
GM factory document — 2027 gmc savana cargo fleet order guide, p.27.
GM factory document — 2027 gmc savana passenger fleet order guide, p.20.

Vandura and Rally — Second generation G-series (1983–1996)

1983, 1984, 1986–1989 Factory-verified

1984 from the February 1984 data book pages in the mislabelled G-Van kit file; shared G-van platform code; cited from the Chevrolet G-Van kit

GM Heritage factory kit — 1983 Chevrolet Vandura, p.23.
GM Heritage factory kit — 1985 Chevrolet G Van, p.19.
GM Heritage factory kit — 1986 Chevrolet G Van, p.26.
GM Heritage factory kit — 1987 Chevrolet G Van, p.22.
GM Heritage factory kit — 1988 Chevrolet Vandura, p.29.
GM Heritage factory kit — 1989 Chevrolet G Van, p.16.

This page aggregates every documented appearance of A18 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.