Emission system, California, Tier 1

Years 1996–02 Models 13 Factory citations 28

Also described as Emission system, CaliforniaEmissions system, California and Massachusetts, Tier 1Emissions, California Tier 1

Also documented for Buick Cadillac GMC Oldsmobile Pontiac

Documented applications

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

1998 Factory-verified internal

GM factory document — 1998 chevrolet blazer 4wd rpo code list, p.1.

C/K pickup — GMT400 (1988–2000)

1998–2000 Factory-verified internal

GM factory document — 1998 chevrolet chevy c pickup 2wd rpo code list, p.1.
GM factory document — 1999 chevrolet chevy c pickup 2wd rpo code list, p.1.
GM factory document — 2000 chevrolet chevy c pickup 2wd rpo code list, p.1.

Corvette — C4 (1984–1996)

1996 Factory-verified internal

GM Heritage factory kit — 1996 Chevrolet Corvette, p.62.

Corvette — C5 (1997–2004)

1997, 1999–2000 Factory-verified internal

GM factory document — 1997 chevrolet corvette rpo code list, p.1.
GM factory document — 1999 chevrolet corvette rpo code list, p.1.
GM factory document — 2000 chevrolet corvette rpo code list, p.1.

Express — GMT600 (1996–2002)

1998–2002 Factory-verified internal

the 2001–2002 lists read "California, Tier 1"

GM factory document — 1998 chevrolet express rpo code list, p.1.
GM factory document — 1999 chevrolet express rpo code list, p.1.
GM factory document — 2000 chevrolet express rpo code list, p.1.
GM factory document — 2001 chevrolet express rpo code list, p.1.
GM factory document — 2002 chevrolet express rpo code list, p.1.

Malibu — Fifth generation (1997–2005)

1998 Factory-verified internal

platform-list code; the Malibu 1997–1999 kit order guides do not show it.

GM factory document — 1998 chevrolet malibu rpo code list, p.1.

Prizm — third generation (1998–2002)

1998–1999 Factory-verified internal

GM factory document — 1998 chevrolet prizm rpo code list, p.1.
GM factory document — 1999 chevrolet prizm rpo code list, p.1.

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

1998 Factory-verified internal

GM factory document — 1998 chevrolet s10 pickup 4wd rpo code list, p.1.

Silverado — GMT800 (1999–2007)

1999–2000 Factory-verified internal

GM factory document — 1999 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM factory document — 2000 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.57.

Suburban — GMT400 (1992–1999)

1998–1999 Factory-verified internal

GM factory document — 1998 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 1999 chevrolet chevy suburban 2wd rpo code list, p.1.

Suburban — GMT800 (2000–2006)

2000 Factory-verified internal

GM factory document — 2000 chevrolet chevy suburban 2wd rpo code list, p.1.
GM Heritage factory kit — 2000 Chevrolet Suburban, p.47.

Tahoe — GMT400 (1995–1999)

1998–1999 Factory-verified internal

GM factory document — 1998 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 1999 chevrolet tahoe 2wd rpo code list, p.1.

Tahoe — GMT800 (2000–2006)

2000 Factory-verified internal

GM factory document — 2000 chevrolet tahoe 2wd rpo code list, p.1.
GM Heritage factory kit — 2000 Chevrolet Tahoe, p.47.

This page aggregates every documented appearance of NB6 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.