GU6 Factory-verified

Chevrolet · Regular Production Option

Axle, rear, 3.42 ratio

Years 1970–89, 1991, 1993–10, 2014–27 Models 41 Factory citations 263

Query this via API →

Also described as 3.42:1 rear axle3.42 rear axleRear axle, 3.42 ratioRear axle ratio 3.42

Also documented for Buick Cadillac GMC Oldsmobile Pontiac

Documented applications

Camaro

1970s Confirmed

C/K Trucks

1973–82 Confirmed

—

Astro — First generation (1985–1994)

1986–1988, 1993, 1994 Factory-verified

power team charts; the 1991 and 1992 pages print it only in the trailering package requirements.

GM Heritage factory kit — 1986 Chevrolet Astro Van, p.10.
GM Heritage factory kit — 1987 Chevrolet Astro Van, p.12.
GM Heritage factory kit — 1988 Chevrolet Astro Van, p.4.
GM Heritage factory kit — 1993 Chevrolet Astro Van, p.10.
GM Heritage factory kit — 1994 Chevrolet Astro Van, p.25.

Astro — Second generation (1995–2005)

1995–2005 Factory-verified

GM Heritage factory kit — 1995 Chevrolet Astro Van, p.12.
GM Heritage factory kit — 1996 Chevrolet Astro Van, p.15.
GM Heritage factory kit — 1997 Chevrolet Astro Van, p.33.
GM factory document — 1998 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 1999 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2000 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2001 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2002 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet astro 2wd rpo code list, p.1.

Avalanche — GMT800 (2002–2006)

2003–2006 Factory-verified

GM factory document — 2003 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet avalanche 2wd rpo code list, p.1.
GM Heritage factory kit — 2005 Chevrolet Avalanche, p.32.

Avalanche — GMT900 (2007–2013)

2007–2009 Factory-verified

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.

Blazer (full-size, K Blazer) — GMT400 (1992–1994)

1993–1994 Factory-verified

the 1993 order guide lists 3.42 as the standard rear axle ratio

GM Heritage factory kit — 1993 Chevrolet Blazer, p.18.
GM Heritage factory kit — 1994 Chevrolet Blazer, p.9.

Blazer (full-size, K5) — Square body (1983–1991)

1983–1986 Factory-verified

power team charts only

GM Heritage factory kit — 1983 Chevrolet Blazer, p.4.
GM Heritage factory kit — 1984 Chevrolet Blazer RV Full Size, p.4.
GM Heritage factory kit — 1985 Chevrolet Blazer RV Full Size, p.6.
GM Heritage factory kit — 1986 Chevrolet Blazer, p.6.

S-10 Blazer — First generation (1983–1994)

1983–1984, 1986–1989, 1994 Factory-verified

the 1985 power team pages print no GU6

GM Heritage factory kit — 1983 Chevrolet S 10 Blazer, p.4.
GM Heritage factory kit — 1984 Chevrolet S 10 Blazer, p.20.
GM Heritage factory kit — 1986 Chevrolet S 10 Blazer, p.15.
GM Heritage factory kit — 1987 Chevrolet S 10 Blazer, p.40.
GM Heritage factory kit — 1988 Chevrolet S 10 Blazer, p.4.
GM Heritage factory kit — 1989 Chevrolet Blazer, p.15.
GM Heritage factory kit — 1994 Chevrolet S 10 Blazer, p.52.

Blazer — S-10 second generation (1995–2005)

1995–2005 Factory-verified

GM factory document — 1998 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 1999 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2000 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2001 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2002 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2003 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2004 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2005 chevrolet blazer 4wd rpo code list, p.1.
GM Heritage factory kit — 1995 Chevrolet S 10 Blazer, p.5.
GM Heritage factory kit — 1996 Chevrolet S 10 Blazer, p.4.
GM Heritage factory kit — 1997 Chevrolet S 10 Blazer, p.10.
GM Heritage factory kit — 1998 Chevrolet S 10 Blazer, p.8.
GM Heritage factory kit — 1999 Chevrolet S 10 Blazer, p.33.

Camaro — Gen 4 (1993–2002)

1994, 1996, 1998–2002 Factory-verified

the 1995 and 1997 option weight pages do not list it

GM factory document — 1998 chevrolet camaro rpo code list, p.1.
GM factory document — 1999 chevrolet camaro rpo code list, p.1.
GM factory document — 2000 chevrolet camaro rpo code list, p.1.
GM factory document — 2001 chevrolet camaro rpo code list, p.1.
GM factory document — 2002 chevrolet camaro rpo code list, p.1.
GM Heritage factory kit — 1994 Chevrolet Camaro, p.64.
GM Heritage factory kit — 1996 Chevrolet Camaro, p.117.

Caprice — fourth generation, B-body (1991–1996)

1991 Factory-verified

police only (1BL19)

GM Heritage factory kit — 1991 Chevrolet Caprice, p.80.

C/K pickup — GMT400 (1988–2000)

1988, 1989, 1993–2000 Factory-verified

GM factory document — 1998 chevrolet chevy c pickup 2wd rpo code list, p.1.
GM factory document — 1999 chevrolet chevy c pickup 2wd rpo code list, p.1.
GM factory document — 2000 chevrolet chevy c pickup 2wd rpo code list, p.1.
GM Heritage factory kit — 1988 Chevrolet Truck, p.22.
GM Heritage factory kit — 1989 Chevrolet Truck, p.31.
GM Heritage factory kit — 1993 Chevrolet Truck, p.14.
GM Heritage factory kit — 1994 Chevrolet Truck, p.12.
GM Heritage factory kit — 1995 Chevrolet Truck, p.9.
GM Heritage factory kit — 1996 Chevrolet Truck, p.16.
GM Heritage factory kit — 1997 Chevrolet Truck, p.17.

C/K pickup — Square body (1983–1991)

1983–1987 Factory-verified

power team charts only

GM Heritage factory kit — 1983 Chevrolet Truck, p.13.
GM Heritage factory kit — 1984 Chevrolet Truck, p.21.
GM Heritage factory kit — 1985 Chevrolet Truck, p.21.
GM Heritage factory kit — 1986 Chevrolet Truck, p.20.
GM Heritage factory kit — 1987 Chevrolet Truck, p.37.

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

2015–2019, 2021–2022 Factory-verified

2015: WT, LT, Z71: O; Base: not offered; with LFX, LGZ or LWN; 2018 from GM's 2018 Colorado order guide (PDF)

GM factory document — 2015 chevrolet colorado fleet order guide wayback, p.4.
GM factory document — 2016 chevrolet canyon colorado electrical body builders manual service manual 2016 en us, p.9.
GM factory document — 2017 chevrolet canyon colorado electrical body builders manual service manual 2017 en us, p.10.
GM factory document — 2019 chevrolet 19 coloradocanyon body builder sm u 2018aug01 1, p.10.
GM factory document — 2021 chevrolet colorado fleet order guide wayback, p.1.
GM factory document — 2022 chevrolet 22 canyon colorado electrical body builder sm en us 2021oct15, p.10.
GM factory document — 2018 chevrolet colorado order guide copy gm authority, p.14.

Colorado — Third generation (2023–2027)

2023–2027 Factory-verified

S on all trims

GM factory document — 2023 chevrolet 23colorado electrical body builder, p.11.
GM factory document — 2024 chevrolet 24colorado electrical body builder manual 18272478 2023oct09, p.12.
GM factory document — 2025 chevrolet colorado fleet order guide, p.50.
GM factory document — 2026 chevrolet colorado fleet order guide, p.56.
GM factory document — 2027 chevrolet colorado fleet order guide, p.55.

Colorado — GMT355 (2004–2012)

2004–2006, 2009 Factory-verified

GM factory document — 2004 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet colorado pickup 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet colorado pickup 2wd rpo code list, p.1.

Corvette — C5 (1997–2004)

1997–2004 Factory-verified

GM factory document — 1997 chevrolet corvette rpo code list, p.1.
GM factory document — 1998 chevrolet corvette rpo code list, p.1.
GM factory document — 1999 chevrolet corvette rpo code list, p.1.
GM factory document — 2000 chevrolet corvette rpo code list, p.1.
GM factory document — 2001 chevrolet corvette rpo code list, p.1.
GM factory document — 2002 chevrolet corvette rpo code list, p.1.
GM factory document — 2003 chevrolet corvette rpo code list, p.1.
GM factory document — 2004 chevrolet corvette rpo code list, p.1.

Corvette — C6 (2005–2013)

2005–2009 Factory-verified

Limited slip in the order guides; included with MN6 in 2005 (HK p.95) and standard on the 2006 Z06 (HK p.108).

GM factory document — 2005 chevrolet corvette rpo code list, p.1.
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.
GM Heritage factory kit — 2005 Chevrolet Corvette, p.22.
GM Heritage factory kit — 2006 Chevrolet Corvette, p.25.

Corvette — C7 (2014–2019)

2014–2019 Factory-verified

2016, 2019: from GM order-guide copies (Corvette Action Center; 2019 also GM Authority)

GM factory document — 2014 chevrolet corvette stingray fleet order guide wayback, p.1.
GM factory document — 2015 chevrolet corvette fleet order guide wayback, p.4.
GM factory document — 2017 chevrolet corvette fleet order guide wayback, p.1.
GM factory document — 2018 chevrolet corvette fleet order guide wayback, p.5.

Express — GMT600 (1996–2002)

1996–2002 Factory-verified

GM factory document — 1998 chevrolet express rpo code list, p.1.
GM factory document — 1999 chevrolet express rpo code list, p.1.
GM factory document — 2000 chevrolet express rpo code list, p.1.
GM factory document — 2001 chevrolet express rpo code list, p.1.
GM factory document — 2002 chevrolet express rpo code list, p.1.
GM Heritage factory kit — 1996 Chevrolet G Van, p.63.
GM Heritage factory kit — 1997 Chevrolet Express, p.18.

Express — GMT610 (2003–2027)

2003–2010, 2014–2018, 2022–2027 Factory-verified

the 2025–2027 guides read Rear axle, 3.42 ratio; S: Cargo 1WT, Cutaway 1WT (2027), Cutaway CG33503 (2025–2026), Cutaway 1WT CG33803 (2025–2026), Passenger 1LS, Passenger 1LT; not offered: Cutaway 2WT (2025–2026), Cutaway 1WT CG33903 (2025–2026)

GM factory document — 2003 chevrolet express rpo code list, p.1.
GM factory document — 2004 chevrolet express awd rpo code list, p.1.
GM factory document — 2005 chevrolet express awd rpo code list, p.1.
GM factory document — 2006 chevrolet express awd rpo code list, p.1.
GM factory document — 2007 chevrolet express awd rpo code list, p.1.
GM factory document — 2008 chevrolet express rpo code list, p.1.
GM factory document — 2009 chevrolet express rpo code list, p.1.
GM factory document — 2010 chevrolet gh van elec 1 7 d1 100813, p.13.
GM factory document — 2014 chevrolet gh van elec bbm si brief, p.6.
GM factory document — 2015 chevrolet express savana electrical body builders manual service manual 2015 en us, p.13.
GM factory document — 2016 chevrolet express savana electrical body builders manual service manual 2016 en us, p.7.
GM factory document — 2017 chevrolet express savana electrical body builders manual service manual 2017 en us, p.7.
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 — 2023 chevrolet 23 express savana body builder sm en us 2022sep13, p.14.
GM factory document — 2024 chevrolet 24 express savana body builder manual 18553161 2023oct26, p.14.
GM factory document — 2025 chevrolet my25 express savana electrical bbm, p.11.
GM factory document — 2025 chevrolet express cargo fleet order guide, p.4.
GM factory document — 2025 chevrolet express cutaway fleet order guide, p.6.
GM factory document — 2025 chevrolet express passenger fleet order guide, p.5.
GM factory document — 2026 chevrolet my26 express savana electrical bbm, p.11.
GM factory document — 2026 chevrolet express cargo fleet order guide, p.4.
GM factory document — 2026 chevrolet express cutaway fleet order guide, p.7.
GM factory document — 2026 chevrolet express passenger fleet order guide, p.5.
GM factory document — 2027 chevrolet express cargo fleet order guide, p.4.
GM factory document — 2027 chevrolet express cutaway fleet order guide, p.4.
GM factory document — 2027 chevrolet express passenger fleet order guide, p.5.

Chevy Van — Second generation G-series (1983–1996)

1983, 1984, 1986–1989, 1993–1996 Factory-verified

GM Heritage factory kit — 1983 Chevrolet Vandura, p.6.
GM Heritage factory kit — 1984 Chevrolet G Van, p.8.
GM Heritage factory kit — 1986 Chevrolet G Van, p.15.
GM Heritage factory kit — 1987 Chevrolet G Van, p.14.
GM Heritage factory kit — 1988 Chevrolet Vandura, p.9.
GM Heritage factory kit — 1989 Chevrolet G Van, p.17.
GM Heritage factory kit — 1993 Chevrolet G Van, p.12.
GM Heritage factory kit — 1994 Chevrolet G Van, p.8.
GM Heritage factory kit — 1995 Chevrolet G Van, p.3.
GM Heritage factory kit — 1996 Chevrolet G Van, p.43.

S-10 pickup — First generation (1982–1993)

1982–1989, 1993 Factory-verified

GM Heritage factory kit — 1982 Chevrolet S 10, p.5.
GM Heritage factory kit — 1983 Chevrolet S 10, p.37.
GM Heritage factory kit — 1984 Chevrolet S 10, p.8.
GM Heritage factory kit — 1985 Chevrolet S 10, p.16.
GM Heritage factory kit — 1986 Chevrolet S 10, p.8.
GM Heritage factory kit — 1987 Chevrolet S 10, p.16.
GM Heritage factory kit — 1988 Chevrolet S 10, p.16.
GM Heritage factory kit — 1989 Chevrolet S 10, p.40.
GM Heritage factory kit — 1993 Chevrolet S 10, p.6.

S-10 pickup — Second generation (1994–2004)

1994–2004 Factory-verified

GM factory document — 1998 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 1999 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2000 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2001 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2002 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2003 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2004 chevrolet s10 pickup 4wd rpo code list, p.1.
GM Heritage factory kit — 1994 Chevrolet S 10, p.11.
GM Heritage factory kit — 1995 Chevrolet S 10, p.6.
GM Heritage factory kit — 1996 Chevrolet S 10, p.12.
GM Heritage factory kit — 1997 Chevrolet S 10, p.12.

Silverado 1500 — Fifth generation (2027)

2027 Factory-verified

GM factory document — 2027 chevrolet next generation silverado 1500 retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 chevrolet next generation silverado 1500 retail and fleet fleet order guide, p.13.

Silverado — GMT800 (1999–2007)

1999–2007 Factory-verified

GM factory document — 1999 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM factory document — 2007 chevrolet silverado classic 2wd rpo code list, p.1.
GM Heritage factory kit — 2000 Chevrolet Truck and Silverado, p.56.
GM Heritage factory kit — 2007 Chevrolet Silverado, p.55.

Silverado — GMT900 (2007–2013)

2009 Factory-verified

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

Silverado HD (T1XX, 2020–2027)

2023, 2025–2027 Factory-verified

only in: 2500 HD, 3500 HD, 3500 HD chassis cab

GM factory document — 2023 chevrolet 23silverado 2500 3500hd electrical body builder sm en us 2022oct12, p.11.
GM factory document — 2025 chevrolet silverado 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet silverado 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 chevrolet silverado 2500 hd retail and fleet fleet order guide rpo codes, p.1.

Silverado — K2XX (2014–2019)

2015, 2017 Factory-verified

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.19.

Silverado — T1XX (2019–2026)

2019, 2020, 2022–2026 Factory-verified

GM factory document — 2020 chevrolet silverado 1500 fleet order guide wayback, p.1.
GM factory document — 2022 chevrolet 22 silverado 1500 new electrical body builder 042822, p.11.
GM factory document — 2023 chevrolet 23 silverado 1500 electrical body builder sm en us 2022oct24, p.11.
GM factory document — 2024 chevrolet 24 silverado1500 electrical body builder 2023nov29, p.13.
GM factory document — 2025 chevrolet silverado 1500 retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet silverado 1500 retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2019 chevrolet silverado 1500 all new order guide copy gm authority, p.56.

Suburban — GMT400 (1992–1999)

1993–1999 Factory-verified

GM Heritage factory kit — 1993 Chevrolet Suburban, p.12.
GM Heritage factory kit — 1994 Chevrolet Suburban, p.8.
GM Heritage factory kit — 1995 Chevrolet Suburban, p.9.
GM Heritage factory kit — 1996 Chevrolet Suburban, p.5.
GM Heritage factory kit — 1997 Chevrolet Suburban, p.11.
GM factory document — 1998 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 1999 chevrolet chevy suburban 2wd rpo code list, p.1.

Suburban — GMT800 (2000–2006)

2000–2001, 2003–2006 Factory-verified

GM factory document — 2000 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2001 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet chevy suburban 2wd rpo code list, p.1.
GM Heritage factory kit — 2000 Chevrolet Suburban, p.47.
GM Heritage factory kit — 2003 Chevrolet Suburban, p.38.
GM Heritage factory kit — 2005 Chevrolet Suburban, p.140.

Suburban — GMT900 (2007–2014)

2007–2009, 2014 Factory-verified

Trim marks in the 2014 guide: LS, LT, LTZ: O.

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.33.

Suburban — K2XX (2015–2020)

2015–2019 Factory-verified

A on all trims, only with NHT (LT: or Z71); 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.
GM factory document — 2016 chevrolet suburban fleet order guide wayback, p.4.
GM factory document — 2016 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2016 en us, p.8.
GM factory document — 2017 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2017 en us 1, p.19.
GM factory document — 2018 chevrolet suburban order guide copy gm authority, p.59.
GM factory document — 2019 chevrolet suburban order guide copy gm authority, p.62.

Suburban — Square body (1983–1991)

1983–1988 Factory-verified

power team charts only

GM Heritage factory kit — 1983 Chevrolet Suburban, p.6.
GM Heritage factory kit — 1984 Chevrolet Suburban, p.9.
GM Heritage factory kit — 1985 Chevrolet Suburban, p.9.
GM Heritage factory kit — 1986 Chevrolet Suburban, p.8.
GM Heritage factory kit — 1987 Chevrolet Suburban, p.15.
GM Heritage factory kit — 1988 Chevrolet Suburban, p.9.

Tahoe — GMT400 (1995–1999)

1995–1999 Factory-verified

GM factory document — 1998 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 1999 chevrolet tahoe 2wd rpo code list, p.1.
GM Heritage factory kit — 1995 Chevrolet Tahoe, p.2.
GM Heritage factory kit — 1996 Chevrolet Tahoe, p.14.
GM Heritage factory kit — 1997 Chevrolet Tahoe, p.12.
GM Heritage factory kit — 1998 Chevrolet Tahoe, p.40.
GM Heritage factory kit — 1999 Chevrolet Tahoe, p.12.

Tahoe — GMT800 (2000–2006)

2000–2001, 2003–2006 Factory-verified

GM factory document — 2000 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2001 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet tahoe 2wd rpo code list, p.1.
GM Heritage factory kit — 2000 Chevrolet Tahoe, p.47.
GM Heritage factory kit — 2001 Chevrolet Tahoe, p.43.
GM Heritage factory kit — 2003 Chevrolet Tahoe, p.120.
GM Heritage factory kit — 2005 Chevrolet Tahoe, p.115.
GM Heritage factory kit — 2006 Chevrolet Tahoe, p.113.

Tahoe — GMT900 (2007–2014)

2007–2009, 2014 Factory-verified

Trim marks in the 2014 guides: Special Service: S.

GM factory document — 2007 chevrolet tahoe 2wd rpo code list, p.1.
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 special service vehicle fleet order guide wayback, p.4.
GM Heritage factory kit — 2007 Chevrolet Tahoe, p.28, p.135.

Tahoe — K2XX (2015–2020)

2015–2019 Factory-verified

A on all trims, only with NHT (LT: or Z71); 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.5.
GM factory document — 2016 chevrolet tahoe fleet order guide wayback, p.4.
GM factory document — 2016 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2016 en us, p.8.
GM factory document — 2017 chevrolet escalade escalade esv suburban tahoe yukon yukon xl electrical body builders manual service manual 2017 en us 1, p.19.
GM factory document — 2018 chevrolet tahoe order guide copy gm authority, p.61.
GM factory document — 2019 chevrolet tahoe order guide copy gm authority, p.65.

TrailBlazer — GMT360 (2002–2009)

2002–2009 Factory-verified

GM Heritage factory kit — 2002 Chevrolet Trailblazer, p.27.
GM factory document — 2002 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2007 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet trailblazer 2wd rpo code list, p.1.

This page aggregates every documented appearance of GU6 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.