Defogger, rear window, electric

Years 1987, 1996, 1998–00, 2004–07, 2012, 2016, 2025–26 Models 9 Factory citations 19

Also described as Electric rear window defoggerDefogger, rear-window electricDefogger, rear-window, electric, activates on remote start at 45 degrees or below

Also documented for Cadillac Chevrolet GMC Hummer Oldsmobile Pontiac Saturn

Documented applications

Century — A-body (1982–1996)

1996 Confirmed

Standard

Century — W-body (1997–2005)

1998–2000 Factory-verified

GM factory document — 1998 buick century rpo code list, p.1.
GM factory document — 1999 buick century rpo code list, p.1.
GM factory document — 2000 buick century rpo code list, p.1.

Envista — VSS-F (2024–2027)

2025–2026 Factory-verified

all trims: S

GM factory document — 2025 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2025 buick envista fleet order guide, p.1.
GM factory document — 2026 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2026 buick envista fleet order guide, p.1.

Rainier — GMT360 (2004–2007)

2004–2007 Factory-verified

GM factory document — 2004 buick rainier 2wd rpo code list, p.1.
GM factory document — 2007 buick rainier rpo code list, p.1.

Regal — G-body (1983–1987)

1987 Factory-verified

required in New York State; gnttype.org's 1987 option sheet; shared G-body code, cited from the Monte Carlo kit

GM Heritage factory kit — 1987 Chevrolet Monte Carlo, p.88.

Regal — W-body (1997–2004)

1998–2000 Factory-verified

GM factory document — 1998 buick regal rpo code list, p.1.
GM factory document — 1999 buick regal rpo code list, p.1.
GM factory document — 2000 buick regal rpo code list, p.1.

Skylark — N-body (1992–1998)

1998 Factory-verified

GM factory document — 1998 buick skylark rpo code list, p.1.

Terraza — U-body / GMT201 (2005–2007)

2005–2007 Factory-verified

GM factory document — 2005 buick terraza rpo code list, p.1.
GM factory document — 2006 buick terraza rpo code list, p.1.
GM factory document — 2007 buick terraza rpo code list, p.1.

Verano — Delta II (2012–2017)

2012, 2016 Factory-verified

2016: all trims: S; 2012: GM 2012 ordering guide, all trims: S

GM factory document — 2016 buick verano fleet order guide wayback, p.2.
GM factory document — 2012 buick verano online ordering guide copy gm authority, p.2.

This page aggregates every documented appearance of C49 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.