Emission system, federal, Tier 2 phase-out

Years 2003–10 Models 20 Factory citations 71

Also described as Emission system, Federal, Tier 2 phase-outEmission system, federal Tier 2 phase-outEmission system, federal, Tier 2 phase outEmissions, Federal Tier 2 phase-out

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)

2003–2006 Factory-verified internal

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

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 — 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)

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.16.

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)

2004–2005 Factory-verified internal

only in: Malibu Classic.

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)

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.
GM Heritage factory kit — 2005 Chevrolet Malibu, p.22.

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)

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.56.

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)

2003–2006 Factory-verified internal

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.
GM Heritage factory kit — 2004 Chevrolet Suburban, p.41.

Tahoe — GMT800 (2000–2006)

2003–2006 Factory-verified internal

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 — 2003 Chevrolet Tahoe, p.32.

TrailBlazer — GMT360 (2002–2009)

2004 Factory-verified internal

GM Heritage factory kit — 2004 Chevrolet Trailblazer, p.33.
GM factory document — 2004 chevrolet trailblazer 2wd 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 NT9 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.