- 1998–2002 Factory-verified
UJ1 Factory-verified
Also described as Indicator, brake warning systemIndicator, brake warning
Also documented for Chevrolet
Documented applications
- 2003–2010, 2014–2016, 2018, 2022–2027 Factory-verified
the 2025–2027 guides read Brake warning indicator; O: Cargo 1WT, Cutaway 1WT, Cutaway 2WT (2025–2026); in the 2025–2027 guides only in the Cargo and Cutaway guides
- 1984 Factory-verified
available only with B3D school bus equipment; 1984 from the February 1984 data book pages in the mislabelled G-Van kit file; shared G-van platform code; cited from the Chevrolet G-Van kit
GM Heritage factory kit — 1985 Chevrolet G Van, p.84.
This page aggregates every documented appearance of UJ1 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.