Transfer case, active

Years 1998, 2000–09 Models 4 Factory citations 12

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

Also documented for Buick Chevrolet Oldsmobile

Documented applications

Envoy — GMT360 (2002–2009)

2002–2009 Factory-verified

GM factory document — 2002 gmc envoy 2wd rpo code list, p.1.
GM factory document — 2003 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.

Jimmy — second generation (1995–2001)

1998, 2000, 2001 Factory-verified

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

GM factory document — 1998 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 2000 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 2001 gmc jimmy 4wd rpo code list, p.1.

Safari — Second generation (1995–2005)

2003 Factory-verified

GM factory document — 2003 gmc safari 2wd rpo code list, p.1.

Sonoma — 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 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2000 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2001 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2002 gmc sonoma pickup 4wd rpo code list, p.1.

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