Transfer case, 4WD, open differential, 2-speed

Years 2003–06 Models 3 Factory citations 6

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Also described as Transfer case, 4 wheel drive (4WD), open differential, 2 speed

Also documented for Cadillac Chevrolet Hummer

Documented applications

Sierra — GMT800 (1999–2007)

2004 Factory-verified

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

Sierra HD — GMT800 (2001–2007)

2004 Factory-verified

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

Yukon — GMT800 (2000–2006)

2003–2006 Factory-verified

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

This page aggregates every documented appearance of NR4 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.