NF4 Factory-verified

Chevrolet · Regular Production Option

Emission system, clean fuel fleet

Years 2001–10 Models 23 Factory citations 88

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Also described as Emission system, clean fuel, fleetEmissions, clean fuel fleet

Also documented for Buick Cadillac GMC Hummer Oldsmobile Pontiac Saturn

Documented applications

Astro — Second generation (1995–2005)

2004, 2005 Factory-verified internal

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

Avalanche — GMT800 (2002–2006)

2002–2006 Factory-verified internal

GM factory document — 2002 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet avalanche 2wd rpo code list, p.1.

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

2001–2005 Factory-verified internal

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.
GM factory document — 2005 chevrolet blazer 4wd rpo code list, p.1.

Cobalt — Delta (2005–2010)

2005–2006 Factory-verified internal

GM factory document — 2005 chevrolet cobalt rpo code list, p.1.
GM factory document — 2006 chevrolet cobalt rpo code list, p.1.
GM Heritage factory kit — 2005 Chevrolet Cobalt, p.40.

Colorado — GMT355 (2004–2012)

2005, 2006 Factory-verified internal

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)

2001–2002 Factory-verified internal

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 Factory-verified internal

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.15.

HHR (2006–2011)

2006–2007 Factory-verified internal

GM factory document — 2006 chevrolet hhr rpo code list, p.1.
GM factory document — 2007 chevrolet hhr rpo code list, p.1.
GM Heritage factory kit — 2006 Chevrolet HHR, p.24.

Impala — eighth generation (2000–2005)

2003–2005 Factory-verified internal

GM factory document — 2003 chevrolet impala rpo code list, p.1.
GM factory document — 2004 chevrolet impala rpo code list, p.1.
GM factory document — 2005 chevrolet impala rpo code list, p.1.
GM Heritage factory kit — 2003 Chevrolet Impala, p.25.
GM Heritage factory kit — 2004 Chevrolet Impala, p.30.

Impala — ninth generation (2006–2016)

2006–2007 Factory-verified internal

GM factory document — 2006 chevrolet impala rpo code list, p.1.
GM factory document — 2007 chevrolet impala rpo code list, p.1.

Malibu — Fifth generation (1997–2005)

2003–2005 Factory-verified internal

GM factory document — 2003 chevrolet malibu rpo code list, p.1.
GM factory document — 2004 chevrolet classic rpo code list, p.1.
GM factory document — 2005 chevrolet classic rpo code list, p.1.

Malibu — Sixth generation, Epsilon (2004–2008)

2006–2007 Factory-verified internal

shared Epsilon code (Pontiac G6).

GM factory document — 2006 chevrolet malibu rpo code list, p.1.
GM factory document — 2007 chevrolet malibu rpo code list, p.1.

Monte Carlo — sixth generation (2000–2007)

2003–2007 Factory-verified internal

GM factory document — 2003 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2004 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2005 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2006 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2007 chevrolet monte carlo rpo code list, p.1.

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

2001–2004 Factory-verified internal

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)

2002–2007 Factory-verified internal

GM factory document — 2002 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 — 2002 Chevrolet Silverado, p.46.
GM Heritage factory kit — 2007 Chevrolet Silverado, p.60.

Silverado HD — GMT800 (2001–2007)

2002–2007 Factory-verified internal

GM factory document — 2002 chevrolet chevy c silverado 2wd rpo code list, p.1.
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.

Silverado HD — GMT900 (2007–2014)

2007–2008 Factory-verified internal

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

SSR (2003–2006)

2005–2006 Factory-verified internal

GM factory document — 2005 chevrolet ssr rpo code list, p.1.
GM factory document — 2006 chevrolet ssr rpo code list, p.1.

Suburban — GMT800 (2000–2006)

2002–2006 Factory-verified internal

GM factory document — 2002 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet chevy suburban 2wd rpo code list, p.1.
GM Heritage factory kit — 2003 Chevrolet Suburban, p.39.

Tahoe — GMT800 (2000–2006)

2002–2006 Factory-verified internal

GM factory document — 2002 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet tahoe 2wd rpo code list, p.1.
GM Heritage factory kit — 2002 Chevrolet Tahoe, p.30.
GM Heritage factory kit — 2003 Chevrolet Tahoe, p.32.

TrailBlazer — GMT360 (2002–2009)

2006, 2007 Factory-verified internal

GM Heritage factory kit — 2006 Chevrolet Trailblazer, p.28.
GM factory document — 2006 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2007 chevrolet trailblazer 2wd rpo code list, p.1.

Uplander (2005–2008)

2005, 2006 Factory-verified internal

GM factory document — 2005 chevrolet uplander rpo code list, p.1.
GM factory document — 2006 chevrolet uplander rpo code list, p.1.

Venture — U-body minivan (1997–2005)

2001–2005 Factory-verified internal

GM factory document — 2001 chevrolet venture ext rpo code list, p.1.
GM factory document — 2002 chevrolet venture ext rpo code list, p.1.
GM factory document — 2003 chevrolet venture ext rpo code list, p.1.
GM factory document — 2004 chevrolet venture ext rpo code list, p.1.
GM factory document — 2005 chevrolet venture ext rpo code list, p.1.

This page aggregates every documented appearance of NF4 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.