Seat, rear, folding, center

Years 1983–91, 1998–09 Models 7 Factory citations 27

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Also described as Seat, rear, folding center/second seatSeat, center, foldingSeat, rear center, folding

Also documented for Buick Cadillac Chevrolet Oldsmobile Pontiac

Documented applications

Sierra — GMT400 (1988–2000)

1998–2000 Factory-verified

GM factory document — 1998 gmc gmc c pickup 2wd rpo code list, p.1.
GM factory document — 1999 gmc gmc c pickup 2wd rpo code list, p.1.
GM factory document — 2000 gmc gmc c pickup 2wd rpo code list, p.1.

Sierra — GMT800 (1999–2007)

1999–2001 Factory-verified

GM factory document — 1999 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2001 gmc gmc c sierra 2wd rpo code list, p.1.

Suburban — GMT400 (1992–1999)

1998–1999 Factory-verified

GM factory document — 1998 gmc gmc suburban 2wd rpo code list, p.1.
GM factory document — 1999 gmc gmc suburban 2wd rpo code list, p.1.

Suburban — Square body (1983–1991)

1983–1991 Single-source

non-adjustable, with independent left-hand and right-hand folding sections; one of AT5, AS3 or YG4 must be ordered; 1984, 1987 and 1988 from the seat trim price lines with AT5 (the 1984 option line prints ATS), 1989 from the option weight table and 1990 from the model page heading for the optional folding center seat (the 1990 option line prints ATS); shared square-body platform code; cited from the Chevrolet Suburban kit; 1991 rests on the Chevrolet-only 1991 Suburban book, so the row is single-source

GM Heritage factory kit — 1983 Chevrolet Suburban, p.18.
GM Heritage factory kit — 1984 Chevrolet Suburban, p.15.
GM Heritage factory kit — 1985 Chevrolet Suburban, p.20.
GM Heritage factory kit — 1986 Chevrolet Suburban, p.21.
GM Heritage factory kit — 1987 Chevrolet Suburban, p.21.
GM Heritage factory kit — 1988 Chevrolet Suburban, p.15.
GM Heritage factory kit — 1989 Chevrolet Suburban, p.13.
GM Heritage factory kit — 1990 Chevrolet Suburban, p.3.
GM Heritage factory kit — 1991 Chevrolet Suburban, p.19.

Yukon — GMT400 (1992–1999)

1998–1999 Factory-verified

the 1998 list reads "Seat, Center"

GM factory document — 1998 gmc yukon 2wd rpo code list, p.1.
GM factory document — 1999 gmc yukon 2wd rpo code list, p.1.

Yukon — GMT800 (2000–2006)

2000–2006 Factory-verified

GM factory document — 2000 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2001 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2002 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2003 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2004 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2005 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2006 gmc yukon 2wd rpo code list, p.1.

Yukon — GMT900 (2007–2014)

2007–2009 Factory-verified

GM factory document — 2007 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2009 gmc yukon 2wd rpo code list, p.1.

This page aggregates every documented appearance of AT5 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.