- 2025–2027 Factory-verified
Fleet or Government orders only; includes EZ Lift power lock and release tailgate (QT5) on the pickups; the 3500 HD CC lists name DBG trailering mirrors instead; Pro: O; SLE, SLT, AT4, AT4X, Denali, Denali Ultimate: not offered
ZLQ Factory-verified
Also described as Fleet Convenience Package
Also documented for Chevrolet
Documented applications
- 2019–2020, 2022–2026 Factory-verified
the upfitter lists read "Sales package, LS fleet"
This page aggregates every documented appearance of ZLQ in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.