UE1 Factory-verified

Buick · Regular Production Option

Communication system, vehicle, GPS 1

Years 2001–09, 2012, 2014–19, 2022–23, 2025–27 Models 23 Factory citations 65

Also described as OnStar Guidance plan, trialOnStar and Buick connected services capableOnStar services capableOnStar, with trial service planOnStarOnStar Directions and Connections plan, 6 monthsOnStar Guidance Plan, limited trial serviceOnStar Guidance plan, 6 monthsOnStar, 6 month trial

Also documented for Cadillac Chevrolet GMC Hummer Oldsmobile Pontiac Saturn

Documented applications

Cascada — Delta II (2016–2019)

2016–2019 Factory-verified

all trims: S; 6 months in the 2016 guide, 3 months in the 2017 guide (fleet orders 6 months), limited trial service in 2018–2019

GM factory document — 2016 buick cascada order guide copy gm authority, p.2, p.6.
GM factory document — 2017 buick cascada order guide copy gm authority, p.2, p.11.
GM factory document — 2018 buick cascada order guide copy gm authority, p.2, p.11.
GM factory document — 2019 buick cascada order guide copy gm authority, p.2, p.11.

Century — W-body (1997–2005)

2001–2005 Factory-verified

GM factory document — 2001 buick century rpo code list, p.1.
GM factory document — 2002 buick century rpo code list, p.1.
GM factory document — 2003 buick century rpo code list, p.1.
GM factory document — 2004 buick century rpo code list, p.1.
GM factory document — 2005 buick century rpo code list, p.1.

Enclave — C1XX (2018–2024)

2018, 2022–2023 Factory-verified

S on all trims; the guide gives this code for retail sales from 5/1/2018 and, for sales through 4/30/2018, as the OnStar Guidance Plan limited trial service

GM factory document — 2018 buick enclave fleet order guide wayback, p.1.
GM factory document — 2022 buick enclave order guide copy nhtsa docket, p.4, p.22.
GM factory document — 2023 buick enclave order guide copy autoevolution wayback, p.4, p.21.

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.3.
GM factory document — 2026 buick enclave fleet order guide, p.3.
GM factory document — 2027 buick enclave fleet order guide, p.4.

Encore — Gamma II (2013–2022)

2014, 2018–2019 Factory-verified

all trims: S; 2014: 6 months of the Directions and Connections plan; 2018: 3-month Guidance Plan (6 months for fleet); 2019: OnStar and Buick connected services capable (3-month fleet trial)

GM factory document — 2014 buick encore fleet order guide wayback, p.2.
GM factory document — 2018 buick encore order guide copy gm authority, p.3, p.17.
GM factory document — 2019 buick encore order guide copy gm authority, p.2, p.15.

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.3.
GM factory document — 2026 buick encore gx fleet order guide, p.3.
GM factory document — 2027 buick encore gx fleet order guide, p.3.

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

2016–2019 Factory-verified

all trims: S; the 2016 and 2017 guides give a 6 month Guidance plan, the 2018 guide a limited Guidance plan trial; the 2019 guide prints both that trial (retail sales through April 30, 2018) and OnStar and Buick connected services capability (from May 1, 2018)

GM factory document — 2016 buick envision order guide copy gm authority, p.2, p.12.
GM factory document — 2017 buick envision order guide copy gm authority, p.3, p.15.
GM factory document — 2018 buick envision order guide copy gm authority, p.3, p.15.
GM factory document — 2019 buick envision order guide copy gm authority, p.3, p.16, p.17.

Envision — E2XX (2021–2027)

2025–2027 Factory-verified

2027: all trims: S

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.3.

Envista — VSS-F (2024–2027)

2025–2026 Factory-verified

all trims: S; service plan required

GM factory document — 2025 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2025 buick envista fleet order guide, p.3.
GM factory document — 2026 buick envista fleet order guide rpo codes, p.1.
GM factory document — 2026 buick envista fleet order guide, p.3.

LaCrosse — E2XX, 3rd gen (2017–2019)

2017–2019 Factory-verified

2019: all trims: S; the 2017 guide gives a 3 month Guidance plan trial; the 2019 guide reads OnStar and Buick connected services capable

GM factory document — 2017 buick lacrosse fleet order guide wayback, p.2.
GM factory document — 2018 buick lacrosse order guide copy gm authority, p.2.
GM factory document — 2019 buick lacrosse order guide copy gm authority, p.3.

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

2015 Factory-verified

2015: all groups: S

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 — 2007 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.

Park Avenue — G-body (1997–2005)

2001–2004 Factory-verified

GM factory document — 2001 buick park avenue rpo code list, p.1.
GM factory document — 2004 buick park avenue 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); the Sportback list also prints OnStar and Buick connected services capable, as does the 2019 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.3.

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

2016 Factory-verified

2016: all groups: S

GM factory document — 2016 buick regal order guide copy gm authority, p.3, p.17.

Regal — W-body (1997–2004)

2001–2004 Factory-verified

GM factory document — 2001 buick regal rpo code list, p.1.
GM factory document — 2002 buick regal rpo code list, p.1.
GM factory document — 2003 buick regal rpo code list, p.1.
GM factory document — 2004 buick regal rpo code list, p.1.

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

2002–2007 Factory-verified

GM factory document — 2002 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: all trims: S; the 2016 trial is the Guidance plan, the 2012 trial the Directions and Connections plan; 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.2.

This page aggregates every documented appearance of UE1 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.