2014 Factory-verified internal

Lets a dealer in a YF5 or NE1 emission state order the other of the two for registration in the other group of states. Trim marks in the 2014 guide: LS, LT, LTZ: O.

GM factory document — 2014 chevrolet suburban fleet order guide wayback, p.4.

Suburban — K2XX (2015–2020)

2015–2016, 2018–2019 Factory-verified internal

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

GM factory document — 2015 chevrolet suburban fleet order guide wayback, p.4.
GM factory document — 2016 chevrolet suburban fleet order guide wayback, p.4.
GM factory document — 2018 chevrolet suburban order guide copy gm authority, p.30.
GM factory document — 2019 chevrolet suburban order guide copy gm authority, p.31.

Suburban — T1XX (2021–2027)

2025–2027 Factory-verified internal

2027: O on all trims

GM factory document — 2025 chevrolet new suburban fleet order guide, p.28.
GM factory document — 2026 chevrolet suburban fleet order guide, p.29.
GM factory document — 2027 chevrolet suburban fleet order guide, p.28.

Tahoe — GMT900 (2007–2014)

2014 Factory-verified internal

Lets a dealer in a YF5 or NE1 emission state order the other of the two for registration in the other group of states. Trim marks in the 2014 guides: Police: O; Special Service: O.

GM factory document — 2014 chevrolet tahoe police vehicle fleet order guide wayback, p.4.
GM factory document — 2014 chevrolet tahoe special service vehicle fleet order guide wayback, p.4.

Tahoe — K2XX (2015–2020)

2015–2016, 2018–2019 Factory-verified internal

2018–2019 from GM's 2018 and 2019 Tahoe order guides (GM Authority copies)

GM factory document — 2015 chevrolet tahoe fleet order guide wayback, p.5.
GM factory document — 2016 chevrolet tahoe fleet order guide wayback, p.4.
GM factory document — 2018 chevrolet tahoe order guide copy gm authority, p.31.
GM factory document — 2019 chevrolet tahoe order guide copy gm authority, p.32.

Tahoe — T1XX (2021–2027)

2025–2027 Factory-verified internal

2027: O on all trims

GM factory document — 2025 chevrolet new tahoe retail and fleet fleet order guide, p.36.
GM factory document — 2026 chevrolet tahoe retail and fleet fleet order guide, p.39.
GM factory document — 2027 chevrolet tahoe retail and fleet fleet order guide, p.36.
GM factory document — 2027 chevrolet tahoe police package and special service fleet order guide, p.13.

Trailblazer — First generation, VSS-F (2021–2027)

2025–2027 Factory-verified internal

; all trims: O; for dealers ordering vehicles in states that use the YF5 or NE1 emissions

GM factory document — 2025 chevrolet trailblazer fleet order guide, p.12.
GM factory document — 2026 chevrolet trailblazer fleet order guide, p.13.
GM factory document — 2027 chevrolet trailblazer limited fleet order guide, p.15.

Traverse — First generation (2009–2017)

2015 Factory-verified internal

for dealers ordering vehicles in YF5 or NE1 emission states.

GM factory document — 2015 chevrolet traverse fleet order guide wayback, p.3.

Traverse — C1XX (2018–2024)

2018–2019 Factory-verified internal

; all trims: O; for dealers ordering in YF5 or NE1 states

GM factory document — 2018 chevrolet traverse order guide copy gm authority, p.29, p.60.
GM factory document — 2019 chevrolet traverse order guide copy gm authority, p.44, p.88.

Traverse — Third generation (2024–2027)

2025–2027 Factory-verified internal

; O on all trims; for dealers ordering vehicles in YF5 or NE1 emission states

GM factory document — 2025 chevrolet traverse fleet order guide, p.35.
GM factory document — 2026 chevrolet traverse fleet order guide, p.37.
GM factory document — 2027 chevrolet traverse fleet order guide, p.37.

Trax — first US generation (2015–2022)

2016, 2018–2019 Factory-verified internal

; all trims: O

GM factory document — 2016 chevrolet trax fleet order guide wayback, p.4.
GM factory document — 2018 chevrolet trax order guide copy gm authority, p.10.
GM factory document — 2019 chevrolet trax order guide copy gm authority, p.10.

Trax — Second generation, VSS-F (2024–2026)

2025–2026 Factory-verified internal

all trims: O; for dealers in YF5 or NE1 emission states; the state list differs by year

GM factory document — 2025 chevrolet trax fleet order guide, p.14.
GM factory document — 2026 chevrolet trax fleet order guide, p.14.

Volt — first generation (2011–2015)

2015 Factory-verified internal

O; swaps YF5 and NE1 emissions between those states

GM factory document — 2015 chevrolet volt fleet order guide wayback, p.4.

Volt — second generation (2016–2019)

2016–2018 Factory-verified internal

LT, Premier: O; swaps YF5 and NE1 emissions between those states

GM factory document — 2016 chevrolet volt fleet order guide wayback, p.4.
GM factory document — 2017 chevrolet volt fleet order guide wayback, p.4.
GM factory document — 2018 chevrolet volt order guide copy gm authority, p.9.

This page aggregates every documented appearance of NB9 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.