G86 Factory-verified

GMC · Regular Production Option

Rear differential, mechanical limited-slip

Years 2002–09, 2022–23, 2025–27 Models 6 Factory citations 22

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Also described as Axle, limited slipRear axle, limited-slip differential

Also documented for Buick Cadillac Chevrolet

Documented applications

Envoy — GMT360 (2002–2009)

2005–2009 Factory-verified

GM factory document — 2005 gmc envoy 2wd rpo code list, p.1.
GM factory document — 2009 gmc envoy 4wd rpo code list, p.1.

Sierra — GMT800 (1999–2007)

2002–2005 Factory-verified

GM factory document — 2002 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2005 gmc gmc c sierra 2wd rpo code list, p.1.

Sierra HD — GMT800 (2001–2007)

2002–2005 Factory-verified

GM factory document — 2002 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2003 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2004 gmc gmc c sierra 2wd rpo code list, p.1.
GM factory document — 2005 gmc gmc c sierra 2wd rpo code list, p.1.

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 — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: Elevation, AT4, Denali: S

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.10.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.10.
GM factory document — 2025 gmc new yukon denali fleet order guide, p.9.
GM factory document — 2026 gmc yukon denali fleet order guide, p.9.
GM factory document — 2027 gmc yukon fleet order guide, p.9.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: Elevation, AT4, Denali: S

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.10.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.10.
GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.9.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.9.
GM factory document — 2027 gmc yukon xl fleet order guide, p.9.

This page aggregates every documented appearance of G86 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.