- 2018–2019 Factory-verified
Crew Cab only; trailering mirrors (DPN), remote keyless entry (AQQ), remote locking tailgate (A91), 110-volt outlet (KI4), LED cargo box lighting (UF2), deep-tinted glass (AKO), OnStar (UE1), 4G LTE (VV4) and trailering equipment (Z82); not with the Duramax diesel (L5P) or the pickup box delete (ZW9); 2019 marks: Sierra: O; SLE, SLT: not offered; 2018: GM's 2018 Sierra 2500HD order guide
PEF Factory-verified
Also described as LPO, Floor Liner Package
Also documented for BuickChevrolet
Documented applications
- 2025 Factory-verified
O on all trims; 2025 package of CAV, RIA and RIS (a different content from PDK); the guide says it is no longer available to order; not available with PDH
This page aggregates every documented appearance of PEF in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.