Emissions, Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington requirements

; the 2009 Aveo list (aveo-t250) words it as geographically restricted registration; ; ;

;

; 2LT, 3LT, RS: O; Premier: O (2025 only); the 2019 list names 12 states (Connecticut to Washington); the 2025 list names 17 states; the 2026 list prints only "Emissions"

; the 2025 lists name Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Virginia and Washington; the 2024 list names Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington

2017: Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington

the guide names the state requirements: Colorado, Connecticut, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Rhode Island, Vermont, Virginia and Washington

O: 400, 600; the state list differs by year (2025 names Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Washington; 2026 names Colorado, Maryland, Massachusetts, New Jersey, New York, Oregon, Rhode Island, Vermont, Washington);

GM Authority 2014 RPO list

A

; 1LS, 2LS, 1LT, LTZ: O

; 2018 guide: 1LS, 1LT: O, the emissions of twelve named states other than California

the 2005 through 2008 lists add "use MDL Yr" (model year); the 2009 list reads "use 2003 model year".

; 2015: O on all trims; the upfitter lists name it geographically restricted registration; 2018 from GM's 2018 Colorado order guide (PDF); 2021 from the upfitter list GM files for 2021 and 2022

; the 2025 guide omits Colorado, Minnesota, Nevada and New Mexico; the rpo lists print Emissions alone; the upfitter lists read emission certification, geographically restricted registration; the GMC Canyon doc omits New Mexico; O on all trims

the lists add "Use 2003 Model Year" and misprint GVW as CVW.

Heritage 2003 order guide only

The lists add "Use 2003 model year". The 2005 and 2006 order guides name the Maine, Massachusetts, New York or Vermont requirements (HK 2005 p.99; HK 2006 p.111).

2016, 2019: from GM order-guide copies (Corvette Action Center; 2019 also GM Authority)

; state list: 2020–2024 Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Washington; 2025 adds Colorado, Minnesota, Nevada, Virginia; the 2026–2027 lists print only Emissions

; all: O

the state list differs by year; the rpo-code lists print the state names

; O on all trims; the 2025 guide also lists Virginia; the 2026 and 2027 guides also list New Mexico

; the 2006–2009 lists add vehicles up to 14,000 lbs GVW (use 2003 model year); the 2025 guides list Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Virginia and Washington state requirements, and the 2026–2027 guides read Emissions; O: Cargo 1WT, Cutaway 1WT, Cutaway 2WT (2025–2026), Passenger 1LS, Passenger 1LT

the lists add "(Use 2003 Mdl Yr)".

; all trims: O

Kit-only code. The 2003 order guide (p.99, 108, 116) reads "Emissions, Maine or Massachusetts state requirements"; the 2005 guide (p.100, 109) reads "Emissions, Maine, Massachusetts, New York or Vermont state requirements". The 2006-2007 Monte Carlo lists print the geographically restricted registration wording used here.

GM's lists add "(use 2003 model year)". the Pontiac G6 2005 list reads NE1 as California emission; this Malibu list gives the geographic meaning in every year. shared Epsilon code.

GM's lists add "(use 2003 mdl yr)".

; all trims: O

; all trims: O; the 2025 guide adds Colorado, Minnesota, Nevada and Virginia (next row); GM's 2016 Malibu order guide

; all trims: O

The 2003 order guide (p.96, 105, 114) reads "Emissions, Maine or Massachusetts state requirements" and the 2005 guide (p.101, 110, 120) "Emissions, Maine, Massachusetts, New York or Vermont state requirements"; the 2006 and 2007 lists print the geographically restricted registration wording used here. Also in the kit's Monte Carlo order guide.

the state list differs by year (16 states in the 2025 lists, 5 in the 2026 guide, 14 in 2027); the rpo-code lists print the state names; 2025–2027: A in all groups

the 2003 and 2005 Silverado SS order guides read it as Maine/Massachusetts (and New York/Vermont) requirements

The list adds use 2003 model year.

years from Heritage kit pages, not in GM’s service list of that year: 2003 (order guide)

the lists add use 2003 model year

2017: GM's 2017 Silverado 2500HD order guide; 2018: GM's 2018 Silverado 2500HD order guide; 2019: GM's 2019 Silverado 2500HD order guide

only in: 2500 HD, 3500 HD, 3500 HD chassis cab; 2023 is claimed because the Upfitter list reads NE1 as emission certification for geographically restricted registration, the same state-emissions meaning as the guides; the 2025 list names Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Virginia and Washington

the 2020 list names fewer states (no Colorado, Minnesota, Nevada or Virginia); the 2026 list prints only "Emissions";

; all trims: O

1LT, 2LT: O; Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington

; all trims: O; 2018 from GM's 2018 order guide

; O; 50-state certified

kit guide wording; the 2003 kit guide names Maine or Massachusetts, the 2005 kit guide Maine, Massachusetts, New York or Vermont

The 2014 guide words it as emissions for Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington. Trim marks in the 2014 guide: LS, LT, LTZ: O.

A on all trims; 2018–2019 from GM's 2018 and 2019 Suburban order guides (GM Authority copies)

2027: O on all trims; the 2027 guide lists Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New Mexico, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington; the 2025 guide lists Virginia and omits New Mexico

the 2003 guide prints Maine or Massachusetts state requirements, and the 2005 and 2006 guides word it as Maine, Massachusetts, New York or Vermont state requirements

Trim marks in the 2014 guides: Police: O; Special Service: O.

A on all trims; 2018–2019 from GM's 2018 and 2019 Tahoe order guides (GM Authority copies)

2027: O on all trims; the 2027 guide lists Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New Mexico, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington; the 2025 guide lists Virginia and omits New Mexico

; all trims: O; the state list differs by year (Virginia in 2025, New Mexico from 2026)

the 2003 kit names Maine or Massachusetts only; the service lists do not print it

the lists add "use 2003 model year". the 2015 guide reads emissions requirements for Connecticut, Delaware, Maine, Maryland, Massachusetts, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont and Washington.

; all trims: O

; O on all trims; the 2025 list also names Virginia; the 2026 list names New Mexico and omits Virginia; the 2027 list prints only Emissions

; all trims: O

all trims: O; the 2025 guide lists Colorado, Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, New York, Oregon, Pennsylvania, Rhode Island, Vermont, Virginia and Washington; the 2026 list drops Virginia and adds New Mexico

the 2003 order guide reads Emissions, Maine or Massachusetts state requirements; the service lists do not print it.

O

LT, Premier: O