Switch, high idle

Years 2006–10, 2014–16, 2018–19, 2022–27 Models 5 Factory citations 34

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Also described as High idle switch

Also documented for Chevrolet

Documented applications

Savana — GMT610 (2003–2027)

2006–2010, 2014–2016, 2018, 2022–2027 Factory-verified

O: Cargo 1WT, Cutaway 1WT, Cutaway 2WT (2025–2026), Passenger 1LS, Passenger 1LT

GM factory document — 2006 gmc savana rpo code list, p.1.
GM factory document — 2008 gmc savana rpo code list, p.1.
GM factory document — 2008 chevrolet ld electricalfullsizevans, p.18.
GM factory document — 2009 gmc savana rpo code list, p.1.
GM factory document — 2009 chevrolet ld electricalfullsizevans 100813, p.16.
GM factory document — 2010 chevrolet gh van elec 1 7 d1 100813, p.16.
GM factory document — 2014 chevrolet gh van elec bbm si brief, p.8.
GM factory document — 2016 chevrolet express savana electrical body builders manual service manual 2016 en us, p.11.
GM factory document — 2018 chevrolet 18 express savana bodybuilders sm 2017nov06, p.17.
GM factory document — 2022 chevrolet 22 express savana electrical body builder sm en us 2021oct12, p.14.
GM factory document — 2025 chevrolet my25 express savana electrical bbm, p.13.
GM factory document — 2025 gmc savana cargo fleet order guide, p.32.
GM factory document — 2025 gmc savana cutaway fleet order guide, p.40.
GM factory document — 2025 gmc savana passenger fleet order guide, p.24.
GM factory document — 2026 chevrolet my26 express savana electrical bbm, p.13.
GM factory document — 2026 gmc savana cargo fleet order guide, p.34.
GM factory document — 2026 gmc savana cutaway fleet order guide, p.44.
GM factory document — 2026 gmc savana passenger fleet order guide, p.26.
GM factory document — 2027 gmc savana cargo fleet order guide, p.31.
GM factory document — 2027 gmc savana cutaway fleet order guide, p.22.
GM factory document — 2027 gmc savana passenger fleet order guide, p.24.

Sierra — GMT900 (2007–2013)

2009 Factory-verified

GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.

Sierra HD — GMT900 (2007–2014)

2009, 2014 Factory-verified

GM factory document — 2009 gmc sierra 2wd rpo code list, p.1.
GM factory document — 2014 gmc sierra 2500hd fleet order guide wayback, p.4.
GM factory document — 2014 gmc sierra 3500hd fleet order guide wayback, p.4.

Sierra HD — K2XX (2015–2019)

2015, 2018–2019 Factory-verified

2015 marks: Sierra, 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.25.
GM factory document — 2019 gmc sierra 3500hd order guide copy gm authority, p.25.

Sierra HD — T1XX (2020–2027)

2025–2027 Factory-verified

Pro, SLE, SLT, AT4, AT4X, Denali, Denali Ultimate: O

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.45.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide, p.43.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide, p.41.

This page aggregates every documented appearance of UF3 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.