Transfer case, active

Years 1998, 2000–09 Models 4 Factory citations 18

Also described as Transfer case, active, all wheel drive (AWD), single speedTransfer case, active, all wheel drive (AWD)

Also documented for Buick GMC Oldsmobile

Documented applications

Astro — Second generation (1995–2005)

2003 Factory-verified

GM factory document — 2003 chevrolet astro 2wd rpo code list, p.1.

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

1998, 2000–2002 Factory-verified

2000 list adds active 4WD, all wheel drive (AWD)

GM factory document — 1998 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2000 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2001 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2002 chevrolet blazer 4wd rpo code list, p.1.

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

1998, 2000–2002 Factory-verified

2000 list adds active 4WD, all wheel drive (AWD). The 2002 list reads as the 2001 list.

GM factory document — 1998 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2000 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2001 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2002 chevrolet s10 pickup 4wd rpo code list, p.1.

TrailBlazer — GMT360 (2002–2009)

2002–2009 Factory-verified

GM Heritage factory kit — 2002 Chevrolet Trailblazer, p.28.
GM factory document — 2002 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet trailblazer 2wd rpo code list, p.1.
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.
GM factory document — 2008 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet trailblazer 2wd rpo code list, p.1.

This page aggregates every documented appearance of NP4 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.