Interior trim, leather, level 2, Gideon / Very Dark Atmosphere

Years 2019–20, 2022–27 Models 4 Factory citations 21

Also described as Interior trim, Dark Walnut/Slate, perforated leather-appointed seating surfacesInterior trim, leather, level 2, Dark Walnut/Slate

Also documented for Chevrolet

Documented applications

Sierra HD — T1XX (2020–2027)

2025–2027 Factory-verified

SLT (4SA); bench seat AZ3 or bucket seats A50; the name matches the GM Authority 2026 Sierra HD interior colors page

GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide, p.103.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide, p.99.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide, p.93.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2026 Factory-verified

SLT (4SA) in the 2025–2026 guides; the upfitter lists name the color Gideon/Very Dark Atmosphere

GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.11.
GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.12.
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.11.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.13.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.11.
GM factory document — 2025 gmc sierra 1500 retail and fleet fleet order guide, p.168.
GM factory document — 2026 gmc sierra 1500 retail and fleet fleet order guide, p.85.

Yukon — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

Elevation: Dark Atmosphere / Gideon with CoreTec / perforated leather-appointed seating in the 2025–2027 guides

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.78.
GM factory document — 2026 gmc yukon denali fleet order guide, p.85.
GM factory document — 2027 gmc yukon fleet order guide, p.74.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

Elevation: Dark Atmosphere / Gideon with CoreTec / perforated leather-appointed seating in the 2025–2027 guides

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.84.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.85.
GM factory document — 2027 gmc yukon xl fleet order guide, p.76.

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