NT8 Factory-verified

GMC · Regular Production Option

Emission system, federal, Tier 2 A

Years 2004–10 Models 7 Factory citations 18

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Also described as Emissions, Federal Tier 2

Also documented for Buick Cadillac Chevrolet Hummer Oldsmobile

Documented applications

Envoy — GMT360 (2002–2009)

2004–2009 Factory-verified internal

GM factory document — 2004 gmc envoy 2wd rpo code list, p.1.
GM factory document — 2005 gmc envoy 2wd rpo code list, p.1.
GM factory document — 2009 gmc envoy 4wd rpo code list, p.1.

Savana — GMT610 (2003–2027)

2006–2010 Factory-verified internal

GM factory document — 2006 gmc savana rpo code list, p.1.
GM factory document — 2008 gmc savana rpo code list, p.1.
GM factory document — 2008 chevrolet ld electricalfullsizevans, p.18.
GM factory document — 2009 gmc savana rpo code list, p.1.
GM factory document — 2009 chevrolet ld electricalfullsizevans 100813, p.16.
GM factory document — 2010 chevrolet gh van elec 1 7 d1 100813, p.16.

Sierra — GMT800 (1999–2007)

2004–2007 Factory-verified internal

GM factory document — 2004 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2007 gmc sierra classic 2wd rpo code list, p.1.

Sierra — GMT900 (2007–2013)

2009 Factory-verified internal

GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.

Sierra HD — GMT900 (2007–2014)

2009 Factory-verified internal

GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.

Yukon — GMT800 (2000–2006)

2004–2006 Factory-verified internal

GM factory document — 2004 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2005 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2006 gmc yukon 2wd rpo code list, p.1.

Yukon — GMT900 (2007–2014)

2007–2009 Factory-verified internal

GM factory document — 2007 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2009 gmc yukon 2wd rpo code list, p.1.

This page aggregates every documented appearance of NT8 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.