Digital audio system, S-band

Years 2003–09, 2012–19, 2022–23, 2025–27 Models 20 Factory citations 53

Also described as SiriusXM Satellite Radio, 3 month All Access trialSiriusXM Satellite Radio, with trial subscriptionSiriusXM with 360L, trial subscriptionSiriusXM Satellite Radio, trial subscriptionSiriusXM trial subscriptionSiriusXM satellite radio, 3 month trialSiriusXMSiriusXM Satellite RadioSiriusXM satellite radio

Also documented for Cadillac Chevrolet GMC Hummer Oldsmobile Pontiac Saturn

Documented applications

Cascada — Delta II (2016–2019)

2016–2019 Factory-verified

all trims: S; no trial on fleet daily rental orders

GM factory document — 2016 buick cascada order guide copy gm authority, p.1, p.5.
GM factory document — 2017 buick cascada order guide copy gm authority, p.1, p.10.
GM factory document — 2018 buick cascada order guide copy gm authority, p.1, p.10.
GM factory document — 2019 buick cascada order guide copy gm authority, p.1, p.10.

Enclave — C1XX (2018–2024)

2018, 2022–2023 Factory-verified

2018: Essence, Premium, Avenir: S, 3-month All Access trial (the fleet page; GM's June 2017 order guide via GM Authority gives 12 months); 2022–2023: all trims: S, SiriusXM with 360L and a Platinum Plan trial

GM factory document — 2018 buick enclave fleet order guide wayback, p.1.
GM factory document — 2022 buick enclave order guide copy nhtsa docket, p.3, p.19.
GM factory document — 2023 buick enclave order guide copy autoevolution wayback, p.3, p.18.

Enclave — Lambda / GMT967 (2008–2017)

2008–2009 Factory-verified

GM factory document — 2008 buick enclave rpo code list, p.1.
GM factory document — 2009 buick enclave rpo code list, p.1.

Enclave — VSS-S (2025–2027)

2025–2027 Factory-verified

S on all trims

GM factory document — 2025 buick all new enclave fleet order guide, p.2.
GM factory document — 2026 buick enclave fleet order guide, p.2.
GM factory document — 2027 buick enclave fleet order guide, p.2.

Encore — Gamma II (2013–2022)

2014, 2018–2019 Factory-verified

all trims: S; 3-month trial; no trial on fleet daily rental orders

GM factory document — 2014 buick encore fleet order guide wayback, p.2.
GM factory document — 2018 buick encore order guide copy gm authority, p.2, p.15.
GM factory document — 2019 buick encore order guide copy gm authority, p.1, p.13.

Encore GX — VSS-F (2020–2027)

2025–2027 Factory-verified

Preferred, Sport Touring, Avenir: S

GM factory document — 2025 buick encore gx fleet order guide, p.2.
GM factory document — 2026 buick encore gx fleet order guide, p.2.
GM factory document — 2027 buick encore gx fleet order guide, p.2.

Envision — D2XX, imported from China (2016–2020)

2016–2019 Factory-verified

all trims: S; not provided on fleet daily rental orders

GM factory document — 2016 buick envision order guide copy gm authority, p.1, p.10.
GM factory document — 2017 buick envision order guide copy gm authority, p.2, p.13.
GM factory document — 2018 buick envision order guide copy gm authority, p.2, p.13.
GM factory document — 2019 buick envision order guide copy gm authority, p.2, p.14.

Envision — E2XX (2021–2027)

2025–2027 Factory-verified

2027: all trims: S; the full guide calls it a trial subscription

GM factory document — 2025 buick envision fleet order guide rpo codes, p.1.
GM factory document — 2027 buick envision fleet order guide rpo codes, p.1.
GM factory document — 2027 buick envision fleet order guide, p.2.

Envista — VSS-F (2024–2027)

2025–2026 Factory-verified

all trims: S

GM factory document — 2025 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2025 buick envista fleet order guide, p.1.
GM factory document — 2026 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2026 buick envista fleet order guide, p.1.

LaCrosse — E2XX, 3rd gen (2017–2019)

2017–2019 Factory-verified

2019: Preferred, Sport Touring, Essence, Premium, Avenir: S; not on fleet daily rental orders

GM factory document — 2017 buick lacrosse fleet order guide wayback, p.2.
GM factory document — 2018 buick lacrosse order guide copy gm authority, p.1.
GM factory document — 2019 buick lacrosse order guide copy gm authority, p.2.

LaCrosse — Epsilon II, 2nd gen (2010–2016)

2015 Factory-verified

2015: all groups: S; not on fleet daily rental orders

GM factory document — 2015 buick lacrosse fleet order guide wayback, p.2.

LaCrosse — W-body / GMX365 (2005–2009)

2005–2009 Factory-verified

GM factory document — 2005 buick lacrosse rpo code list, p.1.
GM factory document — 2009 buick lacrosse rpo code list, p.1.

LeSabre — H-body (2000–2005)

2003–2005 Factory-verified

GM factory document — 2003 buick lesabre rpo code list, p.1.
GM factory document — 2005 buick lesabre rpo code list, p.1.

Lucerne — G-body (2006–2011)

2006–2009 Factory-verified

GM factory document — 2006 buick lucerne rpo code list, p.1.
GM factory document — 2009 buick lucerne rpo code list, p.1.

Rainier — GMT360 (2004–2007)

2004–2007 Factory-verified

GM factory document — 2004 buick rainier 2wd rpo code list, p.1.
GM factory document — 2007 buick rainier rpo code list, p.1.

Regal — E2XX (2018–2020)

2018–2019 Factory-verified

2019: all trims: S (2019 Sportback order guide)

GM factory document — 2018 buick regal sportback fleet order guide wayback, p.1.
GM factory document — 2018 buick regal tourx fleet order guide wayback, p.1.
GM factory document — 2019 buick regal sportback order guide copy gm authority, p.2.

Regal — Epsilon II, 5th gen (2011–2017)

2013, 2015–2016 Factory-verified

2013 from GM's 2014 list, which deletes it for 2014, replaced by U2M; replaces U2M for 2015 (GM's 2015 list); 2016: all groups: S; 3 month All Access trial; no trial on fleet daily rental orders

GM factory document — 2016 buick regal order guide copy gm authority, p.2, p.15.

Rendezvous — U-body / GMT257 (2002–2007)

2003–2007 Factory-verified

GM factory document — 2003 buick rendezvous awd rpo code list, p.1.
GM factory document — 2006 buick rendezvous awd rpo code list, p.1.
GM factory document — 2007 buick rendezvous fwd rpo code list, p.1.

Terraza — U-body / GMT201 (2005–2007)

2005–2007 Factory-verified

GM factory document — 2005 buick terraza rpo code list, p.1.
GM factory document — 2006 buick terraza rpo code list, p.1.
GM factory document — 2007 buick terraza rpo code list, p.1.

Verano — Delta II (2012–2017)

2012, 2016 Factory-verified

2016: 1SD, 1SG, 1SH, 1SL, 1ST: S; not on fleet daily rental orders; the 2012 trial is XM Select, the 2016 trial All Access; 2012: GM 2012 ordering guide, all trims: S

GM factory document — 2016 buick verano fleet order guide wayback, p.2.
GM factory document — 2012 buick verano online ordering guide copy gm authority, p.1.

This page aggregates every documented appearance of U2K in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.