JHD Factory-verified

GMC · Regular Production Option

Hill descent control

Years 2014–27 Models 11 Factory citations 47

Query this via API →

Also described as Hill Descent Control

Also documented for Buick Chevrolet

Documented applications

Acadia — Third generation (2024–2027)

2025–2027 Factory-verified

2025: AT4: S; Elevation, Denali: not offered; 2026–2027: AT4: S; Elevation, Denali, Denali Ultimate: not offered

GM factory document — 2025 gmc acadia fleet order guide, p.11.
GM factory document — 2026 gmc acadia fleet order guide, p.11.
GM factory document — 2027 gmc acadia fleet order guide, p.13.

Canyon — Second generation (GMT31XX) (2015–2022)

2015–2017, 2019, 2021–2022 Factory-verified

2015–2016: SLE: O; SL, Canyon, SLT: not offered; 2021: AT4: S; Elevation Standard, Elevation, Denali: not offered; the upfitter lists add gear hold

GM factory document — 2015 gmc canyon fleet order guide wayback, p.6.
GM factory document — 2016 gmc canyon fleet order guide wayback, p.2.
GM factory document — 2017 chevrolet canyon colorado electrical body builders manual service manual 2017 en us, p.11.
GM factory document — 2019 chevrolet 19 coloradocanyon body builder sm u 2018aug01 1, p.10.
GM factory document — 2021 gmc canyon fleet order guide wayback, p.1.
GM factory document — 2022 chevrolet 22 canyon colorado electrical body builder sm en us 2021oct15, p.11.

Sierra 1500 — Next-Generation (2027)

2027 Factory-verified

Pro: O; AT4, Elevation, AT4X, Denali, Denali Ultimate: included in the trim group

GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.24.
GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Sierra HD — K2XX (2015–2019)

2015, 2018–2019 Factory-verified

in the off-road suspension package (Z71); 2015 marks: Sierra: not offered; SLE, SLT: O; 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.4.
GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.49.
GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.47.

Sierra HD — T1XX (2020–2027)

2025–2027 Factory-verified

only in: 2500 HD and 3500 HD pickup; Pro, SLE, SLT: O; AT4, AT4X, Denali, Denali Ultimate: included in the trim group

GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide, p.20.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide, p.19.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide, p.20.

Sierra — K2XX (2014–2019)

2014, 2016–2019 Factory-verified

GM factory document — 2014 gmc sierra 1500 fleet order guide wayback, p.4.
GM factory document — 2016 gmc sierra 1500 fleet order guide wayback, p.4.
GM factory document — 2017 chevrolet sierra silverado electrical body builders manual service manual 2017 en us, p.22.
GM factory document — 2018 gmc sierra 1500 order guide copy gm authority, p.89.
GM factory document — 2019 gmc sierra 1500 limited double cab k2xx order guide copy gm authority, p.39.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2026 Factory-verified

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 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

all trims: S

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

Terrain — Third generation (2025–2027)

2025–2027 Factory-verified

S: Elevation AWD, AT4 (from 2026), Denali (from 2026); not offered: Elevation FWD

GM factory document — 2025 gmc next generation terrain fleet order guide, p.4.
GM factory document — 2026 gmc next generation terrain fleet order guide, p.8.
GM factory document — 2027 gmc terrain fleet order guide, p.8.

Yukon — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: AT4, AT4 Ultimate, Denali Ultimate: S; Elevation, 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 denali fleet order guide, p.19.
GM factory document — 2026 gmc yukon denali fleet order guide, p.20.
GM factory document — 2027 gmc yukon fleet order guide, p.18.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: AT4, AT4 Ultimate, Denali Ultimate: S; Elevation, 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.19.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.20.
GM factory document — 2027 gmc yukon xl fleet order guide, p.18.

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