- 2015, 2018–2019 Factory-verified
turn signal indicators, auxiliary cargo and clearance lamps; the 2015 guides say camper; 2015 marks: Sierra: not offered; SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: GM's 2019 Sierra 3500HD order guide
DQS Factory-verified
Also described as Mirrors, outside, vertical trailering, heated, power-adjustable, memory, power-folding, chromeMirrors, outside, vertical trailering, heated, power-adjustable, power-folding, manual-extending
Also documented for Chevrolet
Documented applications
- 2016–2018 Factory-verified
memory; the Silverado K2XX doc reads it as DPN's twin.
- 2020, 2022–2026 Factory-verified
the upfitter lists add turn signal indicators, memory and auxiliary clearance and cargo lamps
This page aggregates every documented appearance of DQS in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.