NU1 Factory-verified

Buick · Regular Production Option

Emission system, California, LEV2

Years 2004–09 Models 8 Factory citations 14

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Also described as Emission system, California LEV2Emission system, California, LEV II

Also documented for Cadillac Chevrolet GMC Oldsmobile Pontiac Saturn

Documented applications

Century — W-body (1997–2005)

2004 Factory-verified internal

GM factory document — 2004 buick century rpo code list, p.1.

Enclave — Lambda / GMT967 (2008–2017)

2008 Factory-verified internal

GM factory document — 2008 buick enclave rpo code list, p.1.

LaCrosse — W-body / GMX365 (2005–2009)

2007–2009 Factory-verified internal

GM factory document — 2007 buick lacrosse rpo code list, p.1.
GM factory document — 2009 buick lacrosse rpo code list, p.1.

Park Avenue — G-body (1997–2005)

2004–2005 Factory-verified internal

GM factory document — 2004 buick park avenue rpo code list, p.1.
GM factory document — 2005 buick park avenue rpo code list, p.1.

Rainier — GMT360 (2004–2007)

2004–2005 Factory-verified internal

GM factory document — 2004 buick rainier 2wd rpo code list, p.1.
GM factory document — 2005 buick rainier rpo code list, p.1.

Regal — W-body (1997–2004)

2004 Factory-verified internal

GM factory document — 2004 buick regal rpo code list, p.1.

Rendezvous — U-body / GMT257 (2002–2007)

2006–2007 Factory-verified internal

GM factory document — 2006 buick rendezvous awd rpo code list, p.1.
GM factory document — 2007 buick rendezvous fwd rpo code list, p.1.

Terraza — U-body / GMT201 (2005–2007)

2005–2007 Factory-verified internal

the 2006 and 2007 lists read Lev 2

GM factory document — 2005 buick terraza rpo code list, p.1.
GM factory document — 2006 buick terraza rpo code list, p.1.
GM factory document — 2007 buick terraza rpo code list, p.1.

This page aggregates every documented appearance of NU1 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.