A28 Factory-verified

GMC · Regular Production Option

Window, rear, full width, sliding

Years 1984–90, 1998–09, 2015–17, 2019, 2021–27 Models 13 Factory citations 51

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Also described as Window, rear, sliding, manualWindow, rear-slidingWindow, sliding rear, full widthWindow, rear, sliding

Also documented for Cadillac Chevrolet Oldsmobile

Documented applications

Canyon — Second generation (GMT31XX) (2015–2022)

2015–2017, 2019, 2021–2022 Factory-verified

2015: SLE, SLT: O; SL, Canyon: not offered; 2016: SLT: S; SLE: O; SL, Canyon: not offered; 2021: Elevation, AT4, Denali: S; Elevation Standard: not offered; the upfitter lists add full width

GM factory document — 2015 gmc canyon fleet order guide wayback, p.2.
GM factory document — 2016 gmc canyon fleet order guide wayback, p.5.
GM factory document — 2017 chevrolet canyon colorado electrical body builders manual service manual 2017 en us, p.8.
GM factory document — 2019 chevrolet 19 coloradocanyon body builder sm u 2018aug01 1, p.9.
GM factory document — 2021 gmc canyon fleet order guide wayback, p.1.
GM factory document — 2022 chevrolet 22 canyon colorado electrical body builder sm en us 2021oct15, p.9.

Canyon — Third generation (VSS-T) (2023–2027)

2023–2027 Factory-verified

S on all trims

GM factory document — 2023 gmc 23canyon electrical body builder 2023march13, p.9.
GM factory document — 2024 gmc 24 canyon electrical body builder manual 2023oct04, p.10.
GM factory document — 2025 gmc canyon fleet order guide, p.4.
GM factory document — 2026 gmc canyon fleet order guide, p.5.
GM factory document — 2027 gmc canyon fleet order guide, p.5.

Canyon — GMT355 (2004–2012)

2004–2009 Factory-verified

GM factory document — 2004 gmc canyon pickup 2wd rpo code list, p.1.
GM factory document — 2005 gmc canyon pickup 2wd rpo code list, p.1.
GM factory document — 2006 gmc canyon pickup 2wd rpo code list, p.1.
GM factory document — 2007 gmc canyon pickup 2wd rpo code list, p.1.
GM factory document — 2008 gmc canyon pickup 2wd rpo code list, p.1.
GM factory document — 2009 gmc canyon pickup 2wd rpo code list, p.1.

Jimmy — second generation (1995–2001)

1998–2001 Factory-verified

1998 list reads sliding rear

GM factory document — 1998 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 1999 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 2000 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 2001 gmc jimmy 4wd rpo code list, p.1.

Sierra — GMT400 (1988–2000)

1998–1999 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.

Sierra — GMT800 (1999–2007)

2005–2007 Factory-verified

GM factory document — 2005 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2007 gmc sierra classic 2wd rpo code list, p.1.

Sierra HD — GMT800 (2001–2007)

2005–2007 Factory-verified

GM factory document — 2005 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2006 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2007 gmc sierra classic 2wd rpo code list, p.1.

Sierra HD — GMT900 (2007–2014)

2007–2008 Factory-verified

GM factory document — 2007 gmc sierra 2wd rpo code list, p.1.
GM factory document — 2008 gmc sierra 2wd rpo code list, p.1.

Sierra — Square body (1983–1991)

1984–1987 Factory-verified

shared platform code; cited from the square-body C/K pickup kits

GM Heritage factory kit — 1984 Chevrolet Truck, p.48.
GM Heritage factory kit — 1985 Chevrolet Truck, p.46.
GM Heritage factory kit — 1986 Chevrolet Truck, p.155.
GM Heritage factory kit — 1987 Chevrolet Truck, p.61.

Sonoma — first generation (1982–1993)

1984, 1986–1990 Factory-verified

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

GM Heritage factory kit — 1984 Chevrolet S 10, p.21.
GM Heritage factory kit — 1986 Chevrolet S 10, p.18.
GM Heritage factory kit — 1987 Chevrolet S 10, p.26.
GM Heritage factory kit — 1988 Chevrolet S 10, p.36.
GM Heritage factory kit — 1989 Chevrolet S 10, p.25.
GM Heritage factory kit — 1990 Chevrolet S 10, p.23.

Sonoma — second generation (1994–2004)

1998–2004 Factory-verified

1998 list reads sliding rear. The 2002–2004 lists read as the 2001 list.

GM factory document — 1998 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 1999 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2000 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2001 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2002 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2003 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2004 gmc sonoma pickup 4wd 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.

Yukon — GMT400 (1992–1999)

1998–1999 Factory-verified

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

This page aggregates every documented appearance of A28 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.