Emission system, California Bin 4

Years 2007–09, 2014 Models 2 Factory citations 3

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Also described as Emissions, California, Bin 4

Also documented for Cadillac Chevrolet GMC Hummer Pontiac Saturn

Documented applications

Encore — Gamma II (2013–2022)

2014 Factory-verified internal

; requires YF5 and NE1

GM factory document — 2014 buick encore fleet order guide wayback, p.4.

Lucerne — G-body (2006–2011)

2007–2009 Factory-verified internal

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

This page aggregates every documented appearance of NU5 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.