- 2015–2017, 2019, 2021–2022 Factory-verified
2015–2016: SL, Canyon, SLE: S; SLT: not offered; 2021: Elevation Standard, Elevation (2LE): S; Elevation (4LE), AT4, Denali: not offered
RTX Factory-verified
Also documented for Chevrolet
Documented applications
This page aggregates every documented appearance of RTX in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.