Exhaust, single-outlet stainless-steel, hidden turned-down tip

Years 2012–13, 2015, 2019, 2025–26 Models 4 Factory citations 6

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Also described as Exhaust, hidden, turned downExhaust tip, turned down, hidden

Also documented for Chevrolet GMC

Documented applications

Envision — D2XX, imported from China (2016–2020)

2019 Factory-verified

1SV, 1SD, 1SL: S; printed as new

GM factory document — 2019 buick envision order guide copy gm authority, p.7, p.23.

Envista — VSS-F (2024–2027)

2025–2026 Factory-verified

all trims: S

GM factory document — 2025 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2025 buick envista fleet order guide, p.4.
GM factory document — 2026 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2026 buick envista fleet order guide, p.5.

LaCrosse — Epsilon II, 2nd gen (2010–2016)

2012, 2015 Factory-verified

2015: 1SB, 1SL FWD: S; with LUK; the LUK entries of the 2015 guide and GM's 2012 list print NWM, in GM's other lists a door lock shield; 2012: GM Authority 2012 RPO list

GM factory document — 2015 buick lacrosse fleet order guide wayback, p.4.

Regal — Epsilon II, 5th gen (2011–2017)

2013 Confirmed

deleted for 2014 (GM's 2014 list)

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