JL4 Factory-verified

GMC · Regular Production Option

Control, active brake

Years 2003–10, 2014–18, 2022–27 Models 7 Factory citations 32

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Also described as Active brake control

Also documented for Buick Cadillac Chevrolet Hummer Oldsmobile Pontiac Saturn

Documented applications

Savana — GMT610 (2003–2027)

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

the 2025–2027 guides read StabiliTrak, traction assistance and vehicle stability enhancement system; S: 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.17.
GM factory document — 2009 gmc savana rpo code list, p.1.
GM factory document — 2009 chevrolet ld electricalfullsizevans 100813, p.15.
GM factory document — 2010 chevrolet gh van elec 1 7 d1 100813, p.15.
GM factory document — 2014 chevrolet gh van elec bbm si brief, p.6.
GM factory document — 2018 chevrolet 18 express savana bodybuilders sm 2017nov06, p.15.
GM factory document — 2022 chevrolet 22 express savana electrical body builder sm en us 2021oct12, p.13.
GM factory document — 2025 chevrolet my25 express savana electrical bbm, p.11.
GM factory document — 2025 gmc savana cargo fleet order guide, p.32.
GM factory document — 2025 gmc savana cutaway fleet order guide, p.41.
GM factory document — 2025 gmc savana passenger fleet order guide, p.24.
GM factory document — 2026 chevrolet my26 express savana electrical bbm, p.11.
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 — GMT800 (1999–2007)

2004 Factory-verified

GM factory document — 2004 gmc gmc c sierra 2wd rpo code list, p.1.

Sierra — GMT900 (2007–2013)

2009 Factory-verified

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

Sierra HD — GMT800 (2001–2007)

2004 Factory-verified

GM factory document — 2004 gmc gmc c sierra 2wd rpo code list, p.1.

Sierra HD — GMT900 (2007–2014)

2009, 2014 Factory-verified

the 2014 guides call it StabiliTrak with Proactive Roll Avoidance, trailer sway control and hill start assist

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.

Yukon — GMT800 (2000–2006)

2003–2006 Factory-verified

GM factory document — 2003 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2004 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2005 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2006 gmc yukon 2wd rpo code list, p.1.

Yukon — GMT900 (2007–2014)

2007–2009 Factory-verified

GM factory document — 2007 gmc yukon 2wd rpo code list, p.1.
GM factory document — 2009 gmc yukon 2wd rpo code list, p.1.

This page aggregates every documented appearance of JL4 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.