HVAC system, heater, outside air, deluxe

Years 1964–82, 1984–87, 1998–10, 2014–18, 2022–26 Models 16 Factory citations 71

Also described as De Luxe Air heater & defrosterDeluxe fresh-air heaterHD (deluxe outside-air) heaterHeater, deluxe, with defoggerHeater, front, heavy dutyHeater, deluxe, outside airHeater onlyHVAC system, heater, deluxeHeater, outside air, deluxeHVAC system, heater, deluxe, outside air

Also documented for GMC Oldsmobile

Documented applications

C/K Trucks

1964–66 Factory-verified

GM Heritage factory kit — 1964 Chevrolet Truck, p.15.
GM Heritage factory kit — 1966 Chevrolet Truck, p.24.
1967–72 Confirmed

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1973–82 Confirmed

—

Astro — First generation (1985–1994)

1987 Factory-verified

the 1987 passenger van page prints deluxe heater and defogger; ck-squarebody reads the code as a heavy duty front heater; the 1986 pages print it only inside other options' contents.

GM Heritage factory kit — 1987 Chevrolet Astro Van, p.27.

Blazer (full-size, K5) — Square body (1983–1991)

1984–1986 Factory-verified

only with B3J diesel equipment; not with C60; the 1983 page prints the heater line without a code

GM Heritage factory kit — 1984 Chevrolet Blazer RV Full Size, p.6.
GM Heritage factory kit — 1985 Chevrolet Blazer RV Full Size, p.11.
GM Heritage factory kit — 1986 Chevrolet Blazer, p.12.

Blazer — S-10 second generation (1995–2005)

1998–2004 Factory-verified

HVAC system in the 2000–2001 lists

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

Camaro — Gen 5 Zeta (2010–2015)

2014 Confirmed

GM Authority 2014 RPO list

C/K pickup — Square body (1983–1991)

1985–1987 Factory-verified

not with C60 air conditioning

GM Heritage factory kit — 1985 Chevrolet Truck, p.43.
GM Heritage factory kit — 1986 Chevrolet Truck, p.158.
GM Heritage factory kit — 1987 Chevrolet Truck, p.58.

Colorado — GMT355 (2004–2012)

2004–2006 Factory-verified

GM factory document — 2004 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet colorado pickup 2wd rpo code list, p.1.

Express — GMT600 (1996–2002)

1998–2002 Factory-verified

the 2001–2002 lists add outside air

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

Express — GMT610 (2003–2027)

2003–2010, 2014–2018, 2022–2026 Factory-verified

GM factory document — 2003 chevrolet express rpo code list, p.1.
GM factory document — 2004 chevrolet express awd rpo code list, p.1.
GM factory document — 2005 chevrolet express awd rpo code list, p.1.
GM factory document — 2006 chevrolet express awd rpo code list, p.1.
GM factory document — 2007 chevrolet express awd rpo code list, p.1.
GM factory document — 2008 chevrolet express rpo code list, p.1.
GM factory document — 2009 chevrolet express rpo code list, p.1.
GM factory document — 2010 chevrolet gh van elec 1 7 d1 100813, p.14.
GM factory document — 2014 chevrolet gh van elec bbm si brief, p.6.
GM factory document — 2015 chevrolet express savana electrical body builders manual service manual 2015 en us, p.11.
GM factory document — 2016 chevrolet express savana electrical body builders manual service manual 2016 en us, p.5.
GM factory document — 2017 chevrolet express savana electrical body builders manual service manual 2017 en us, p.5.
GM factory document — 2018 chevrolet 18 express savana bodybuilders sm 2017nov06, p.15.
GM factory document — 2022 chevrolet 22 express savana electrical body builder sm en us 2021oct12, p.12.
GM factory document — 2023 chevrolet 23 express savana body builder sm en us 2022sep13, p.13.
GM factory document — 2024 chevrolet 24 express savana body builder manual 18553161 2023oct26, p.13.
GM factory document — 2025 chevrolet my25 express savana electrical bbm, p.11.
GM factory document — 2026 chevrolet my26 express savana electrical bbm, p.11.

S-10 pickup — Second generation (1994–2004)

1998–2004 Factory-verified

HVAC system in the 2000–2001 lists. The 2002–2004 lists read as the 2000–2001 lists.

GM factory document — 1998 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 1999 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2000 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2001 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2002 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2003 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2004 chevrolet s10 pickup 4wd rpo code list, p.1.

Silverado — GMT800 (1999–2007)

2003–2007 Factory-verified

GM factory document — 2003 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM factory document — 2007 chevrolet silverado classic 2wd rpo code list, p.1.
GM Heritage factory kit — 2003 Chevrolet Silverado 1500, p.45.
GM Heritage factory kit — 2007 Chevrolet Silverado, p.59.

Silverado — GMT900 (2007–2013)

2009 Factory-verified

GM factory document — 2009 chevrolet silverado 2wd rpo code list, p.1.

Silverado HD — GMT800 (2001–2007)

2003–2007 Factory-verified

GM factory document — 2003 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM factory document — 2007 chevrolet silverado classic 2wd rpo code list, p.1.
GM Heritage factory kit — 2005 Chevrolet Silverado 2500HD, p.172.

Silverado HD — GMT900 (2007–2014)

2007–2009 Factory-verified

GM factory document — 2007 chevrolet silverado 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet silverado 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet silverado 2wd rpo code list, p.1.

Suburban — Square body (1983–1991)

1984, 1986 Factory-verified

only with B3J diesel equipment; not with C60 or C69; the 1985 page prints 642 and the 1987 page CAZ

GM Heritage factory kit — 1984 Chevrolet Suburban, p.22.
GM Heritage factory kit — 1986 Chevrolet Suburban, p.20.

Tracker — Second generation (1999–2004)

1999–2004 Factory-verified

GM factory document — 1999 chevrolet tracker 2wd rpo code list, p.1.
GM factory document — 2000 chevrolet tracker 2wd rpo code list, p.1.
GM factory document — 2001 chevrolet tracker 2wd rpo code list, p.1.
GM factory document — 2002 chevrolet tracker 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet tracker 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet tracker 2wd rpo code list, p.1.

This page aggregates every documented appearance of C42 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.