Exhaust, single system, single-outlet

Years 2008–09, 2015–16, 2019–20, 2022–27 Models 5 Factory citations 23

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Also described as Exhaust system, singleExhaust, single outlet

Also documented for Buick Chevrolet Pontiac Saturn

Documented applications

Acadia — first generation, Lambda (2007–2017)

2008–2009, 2015–2016 Factory-verified

the 2014–2016 guides read single outlet exhaust, in 2015–2016.

GM factory document — 2008 gmc acadia 2wd rpo code list, p.1.
GM factory document — 2009 gmc acadia 2wd rpo code list, p.1.
GM factory document — 2015 gmc acadia fleet order guide wayback, p.4.
GM factory document — 2016 gmc acadia fleet order guide wayback, p.4.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2026 Factory-verified

the 2020 list marks it not for the next new major program (use NC2)

GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.12.
GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.13.
GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.12.
GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.12.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.14.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.12.
GM factory document — 2025 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Terrain — Second generation (D2XX) (2018–2024)

2019 Factory-verified

SL, SLE, SLE Diesel, SLT, SLT Diesel: S

GM factory document — 2019 gmc terrain order guide copy gm authority, p.10, p.45.

Yukon — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: Elevation: S

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.11.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.11.
GM factory document — 2025 gmc new yukon denali fleet order guide, p.9.
GM factory document — 2026 gmc yukon denali fleet order guide, p.9.
GM factory document — 2027 gmc yukon fleet order guide, p.9.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: Elevation: S; Denali: O

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.11.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.11.
GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.9.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.10.
GM factory document — 2027 gmc yukon xl fleet order guide, p.9.

This page aggregates every documented appearance of NB5 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.