NU4 Factory-verified

Chevrolet · Regular Production Option

Emission system, California, LEV2 plus

Years 2003–10, 2014–15, 2017 Models 25 Factory citations 83

Also described as Emission system, California LEV2 plusEmission system, California LEV2 PlusEmission system, California, Level 2 plusEmissions, California Level 2 PlusEmission system, California Level 2 Plus

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)

2004–2006 Factory-verified internal

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.
GM Heritage factory kit — 2005 Chevrolet Avalanche, p.33.

Avalanche — GMT900 (2007–2013)

2007–2009 Factory-verified internal

GM factory document — 2007 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet avalanche 2wd rpo code list, p.1.
GM Heritage factory kit — 2007 Chevrolet Avalanche, p.30.

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

2003–2005 Factory-verified internal

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.

Cavalier — third generation (1995–2005)

2004–2005 Factory-verified internal

GM factory document — 2004 chevrolet cavalier rpo code list, p.1.
GM factory document — 2005 chevrolet cavalier rpo code list, p.1.
GM Heritage factory kit — 2004 Chevrolet Cavalier, p.21.
GM Heritage factory kit — 2005 Chevrolet Cavalier, p.23.

Cobalt — Delta (2005–2010)

2005–2007 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 factory document — 2007 chevrolet cobalt rpo code list, p.1.
GM Heritage factory kit — 2005 Chevrolet Cobalt, p.41.
GM Heritage factory kit — 2007 Chevrolet Cobalt, p.30.

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.

Corvette — C6 (2005–2013)

2005–2006 Factory-verified internal

GM factory document — 2005 chevrolet corvette rpo code list, p.1.
GM factory document — 2006 chevrolet corvette rpo code list, p.1.
GM Heritage factory kit — 2005 Chevrolet Corvette, p.23.

Express — GMT610 (2003–2027)

2004–2010, 2014–2015, 2017 Factory-verified internal

GM factory document — 2004 chevrolet express 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.16.
GM factory document — 2014 chevrolet gh van elec bbm si brief, p.7.
GM factory document — 2015 chevrolet express savana electrical body builders manual service manual 2015 en us, p.14.
GM factory document — 2017 chevrolet express savana electrical body builders manual service manual 2017 en us, p.9.

Impala — eighth generation (2000–2005)

2003 Factory-verified internal

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

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 — Sixth generation, Epsilon (2004–2008)

2004–2005 Factory-verified internal

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

Monte Carlo — sixth generation (2000–2007)

2003, 2006–2007 Factory-verified internal

GM factory document — 2003 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)

2003–2004 Factory-verified internal

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)

2004–2007 Factory-verified internal

GM factory document — 2004 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 — 2006 Chevrolet Silverado, p.61.
GM Heritage factory kit — 2007 Chevrolet Silverado, p.60.

Silverado HD — GMT800 (2001–2007)

2004–2007 Factory-verified internal

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)

2004–2006 Factory-verified internal

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 — 2004 Chevrolet Suburban, p.41.

Suburban — GMT900 (2007–2014)

2007–2009 Factory-verified internal

GM factory document — 2007 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet chevy suburban 2wd rpo code list, p.1.
GM Heritage factory kit — 2007 Chevrolet Suburban, p.34.

Tahoe — GMT800 (2000–2006)

2004–2006 Factory-verified internal

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.

Tahoe — GMT900 (2007–2014)

2007–2009 Factory-verified internal

GM factory document — 2007 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet tahoe 2wd rpo code list, p.1.
GM Heritage factory kit — 2007 Chevrolet Tahoe, p.28.

TrailBlazer — GMT360 (2002–2009)

2004–2007 Factory-verified internal

GM Heritage factory kit — 2004 Chevrolet Trailblazer, p.33.
GM factory document — 2004 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet trailblazer 2wd rpo code list, p.1.
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)

2008 Factory-verified internal

GM factory document — 2008 chevrolet uplander rpo code list, p.1.

Venture — U-body minivan (1997–2005)

2004, 2005 Factory-verified internal

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 NU4 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.