NE1 Factory-verified
Also described as Emissions, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington state requirementsEmissions, Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Virginia and Washington state requirementsEmissions, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington requirementsCertification, emission, geographically restricted registration for vehicles up to 14,000 lb GVWCertification, emission, geographically restricted registration for vehicles up to 14,000 lbs GVW (use 2003 model year)Emissions, states that follow California rules (Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Washington)Emissions, states that follow California rulesCertification, emission, geographically restricted registration for vehicles up to 14,000 lbs GVWCertification emission, geographically restricted registration for vehicles up to 14,000 LBS GVW
Also documented for BuickChevroletGMCHummerPontiacSaturn
Documented applications
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all trims: O; the 2026 lists print only "Emissions"
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the 2025 CT5 list names 16 states (Colorado through Washington)
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; all trims: O; 2018 and 2019 from the 2018 and 2019 CT6 order guides (GM documents)
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The lists add "Use 2003 Mdl Yr"; the 2014 guides list it as the emissions of thirteen named states other than California
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GM's text says to use the 2003 model year.
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; the 2025 list names the states: Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Virginia and Washington
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; the 2025 list names Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Virginia and Washington state requirements
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the 2025 list names the states whose requirements apply (Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Virginia, Washington)
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The list adds "Use 2003 Mdl YR".
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; all trims: O; GM's 2016 SRX order guide (GM Authority's copy, published September 18, 2015)
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The lists add "Use 2003 Model Year".
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The lists add "Use 2003 model year".
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Premium Luxury, Sport: O
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; all trims: O; 2026 lists print only "Emissions"
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; All trims: O
This page aggregates every documented appearance of NE1 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.