Transmission, automatic, 6 speed, HMD, 6L80

Years 2006–09, 2011–22 Models 11 Factory citations 36

Also described as Transmission, 6 speed automatic, 6L80Transmission, automatic 6 speed, HMD, 6L80Transmission, 6-speed paddle-shift automaticTransmission, 6 speed automatic

Also documented for Cadillac GMC Hummer Pontiac

Documented applications

Avalanche — GMT900 (2007–2013)

2007–2009 Factory-verified

Some 2007 and 2008 entries read 6L80-E; Wikipedia names the 6 speed 6L80 automatic and dates it from 2009, while the 2007 and 2008 lists already print it.

GM factory document — 2007 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet avalanche 2wd rpo code list, p.1.

Caprice — Caprice PPV (2011–2017)

2011–2016 Single-source

GM Authority's L77 engine page pairs it with the L77 in the Caprice PPV; the page does not credit GM; it also gives 2017, which is left out because the 2017 order guide prints no MYC (its only transmission line is MX0, inside 1SB); GM Authority's LFX page names MYA (6L45) with the V6, without years

Corvette — C6 (2005–2013)

2006–2009 Factory-verified

GM factory document — 2006 chevrolet corvette rpo code list, p.1.
GM factory document — 2007 chevrolet corvette rpo code list, p.1.
GM factory document — 2008 chevrolet corvette rpo code list, p.1.
GM factory document — 2009 chevrolet corvette rpo code list, p.1.

Corvette — C7 (2014–2019)

2014 Factory-verified

all models: O

GM factory document — 2014 chevrolet corvette stingray fleet order guide wayback, p.1.

Silverado — GMT900 (2007–2013)

2009 Factory-verified

GM factory document — 2009 chevrolet silverado 2wd rpo code list, p.1.

Silverado — K2XX (2014–2019)

2015, 2017–2019 Factory-verified

the 2017 manual names it 6L80.

GM factory document — 2015 chevrolet silverado 1500 fleet order guide wayback, p.1.
GM factory document — 2017 chevrolet sierra silverado electrical body builders manual service manual 2017 en us, p.24.
GM factory document — 2018 chevrolet silverado 1500 fleet order guide copy gm authority, p.4, p.214.
GM factory document — 2019 chevrolet silverado 1500 ld double cab fleet order guide copy gm authority, p.3, p.48.

Silverado — T1XX (2019–2026)

2020, 2022 Factory-verified

2022 from the Silverado LTD list only;

GM factory document — 2020 chevrolet silverado 1500 fleet order guide wayback, p.1.
GM factory document — 2022 chevrolet 22 silverado 1500 ltd electrical body suilder sm en us u 2021oct08, p.12.
2021 Single-source

2021 from a GM Authority article only, no 2021 GM list is in the repository: the GM Authority 2021 Silverado 1500 changes article (https://gmauthority.com/blog/2021/04/2021-chevy-silverado-1500-heres-whats-new-and-different/) prints the 6-speed automatic MYC with the 5.3L L82; the 2020 and 2022 years are in the row above

Suburban — GMT900 (2007–2014)

2007–2009, 2014 Factory-verified

Some 2007 and 2008 entries read 6L80-E; Wikipedia's Suburban page names the 6 speed 6L80 automatic as optional in 2009 and standard from 2010 to 2014, while the 2007 and 2008 lists already print it. Trim marks in the 2014 guide: LS, LT, LTZ: S.

GM factory document — 2007 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2014 chevrolet suburban fleet order guide wayback, p.4.
GM Heritage factory kit — 2007 Chevrolet Suburban, p.34.

Suburban — K2XX (2015–2020)

2015–2019 Factory-verified

S on all trims (2019: with L83); the guides add overdrive and tow/haul mode; 2018–2019 from GM's 2018 and 2019 Suburban order guides (GM Authority copies)

GM factory document — 2015 chevrolet suburban fleet order guide wayback, p.4, p.5.
GM factory document — 2016 chevrolet suburban fleet order guide wayback, p.4, p.5.
GM factory document — 2016 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2016 en us, p.10.
GM factory document — 2017 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2017 en us 1, p.24.
GM factory document — 2018 chevrolet suburban order guide copy gm authority, p.4.
GM factory document — 2019 chevrolet suburban order guide copy gm authority, p.4.

Tahoe — GMT900 (2007–2014)

2008–2009, 2014 Factory-verified

Some 2007 and 2008 entries read 6L80-E; Wikipedia's Tahoe page names the 6 speed 6L80 automatic; the 2014 guides print it as standard (6 speed automatic, electronically controlled, with overdrive). Trim marks in the 2014 guides: Police: S; Special Service: S. 2007 is not claimed: the 2007 Tahoe order guide (kit pp.149, 169) prints only M30 as the transmission, and the kit page 28 is the platform RPO list reprint.

GM factory document — 2008 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2014 chevrolet tahoe police vehicle fleet order guide wayback, p.4.
GM factory document — 2014 chevrolet tahoe special service vehicle fleet order guide wayback, p.4.

Tahoe — K2XX (2015–2020)

2015–2019 Factory-verified

S on all trims (2019: with L83); the guides add overdrive and tow/haul mode; 2018–2019 from GM's 2018 and 2019 Tahoe order guides (GM Authority copies)

GM factory document — 2015 chevrolet tahoe fleet order guide wayback, p.1, p.5.
GM factory document — 2016 chevrolet tahoe fleet order guide wayback, p.4, p.5.
GM factory document — 2016 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2016 en us, p.10.
GM factory document — 2017 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2017 en us 1, p.24.
GM factory document — 2018 chevrolet tahoe order guide copy gm authority, p.4.
GM factory document — 2019 chevrolet tahoe order guide copy gm authority, p.4.

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