Interior trim, Dark Ash seats with Jet Black accents, cloth, SLE seats

Years 2014–19 Models 2 Factory citations 7

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Also described as Interior trim, Jet Black and Dark Ash, cloth, SLE

Also documented for Chevrolet

Documented applications

Sierra HD — K2XX (2015–2019)

2015, 2018–2019 Factory-verified

SLE (3SA) split-bench (AZ3) and bucket seats (A95); 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide

GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.1.
GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.55.
GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.52.

Sierra — K2XX (2014–2019)

2014, 2016–2018 Factory-verified

SLE (3SA), with the 40/20/40 bench (AZ3) or cloth buckets (A95); the 2016 and later guides name the color Dark Ash seats with Jet Black accents.

GM factory document — 2014 gmc sierra 1500 fleet order guide wayback, p.1.
GM factory document — 2016 gmc sierra 1500 fleet order guide wayback, p.1.
GM factory document — 2017 chevrolet sierra silverado electrical body builders manual service manual 2017 en us, p.20.
GM factory document — 2018 gmc sierra 1500 order guide copy gm authority, p.66.

This page aggregates every documented appearance of H2S in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.