- 2003 Factory-verifiedGM Heritage factory kit — 2003 Chevrolet Avalanche, p.37.
U2L Factory-verified
Also described as HD RadioRadio, HD
Also documented for BuickCadillacGMCPontiacSaturn
Documented applications
- 2020–2023 Factory-verified
- 2018–2019 Factory-verified
- 2003 Factory-verified
- 2003 Factory-verified
- 2016–2019 Factory-verified
2017: GM's 2017 Silverado 2500HD order guide; 2018: GM's 2018 Silverado 2500HD order guide; 2019: GM's 2019 Silverado 2500HD order guide
- 2020, 2022 Factory-verified
2022 from the Silverado LTD list only;
- 2003 Factory-verifiedGM Heritage factory kit — 2003 Chevrolet Suburban, p.40.
- 2016–2019 Factory-verified
S on all trims; 2018–2019 from GM's 2018 and 2019 Suburban order guides (GM Authority copies)
- 2003 Factory-verifiedGM Heritage factory kit — 2003 Chevrolet Tahoe, p.33.
- 2016–2019 Factory-verified
S on all trims; 2018–2019 from GM's 2018 and 2019 Tahoe order guides (GM Authority copies)
This page aggregates every documented appearance of U2L in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.