NU4 Factory-verified
Also described as Emission system, California LEV2 plus
Also documented for BuickCadillacChevroletGMCHummerOldsmobileSaturn
Documented applications
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The 2006 list prints "Pluse".
This page aggregates every documented appearance of NU4 in the Pontiac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.