Ward's 10 Best Engines and Propulsion Systems. This GMC Sierra 1500 boasts a Gas V8 5.3L/325 engine powering this Automatic transmission. Windows, power rear, express down (Not available on Regular Cab models.), Windows, power front, drivers express up/down (Standard on Crew Cab and Double Cab. On Regular Cab, included and only available with (PCI) Convenience Package.) (Standard on Crew Cab and Double Cab. On Regular Cab, included and only available with (PCI) Convenience Package or (ZLQ) Fleet Convenience Package.), Window, power front, passenger express down (Standard on Crew Cab and Double Cab. On Regular Cab, included and only available with (PCI) Convenience Package.) (Standard on Crew Cab and Double Cab. On Regular Cab, included and only available with (PCI) Convenience Package or (ZLQ) Fleet Convenience Package.). This GMC Sierra 1500 Comes Equipped with These Options USB port, located on instrument panel, Transmission, 6-speed automatic, electronically controlled with overdrive and tow/haul mode. Includes Cruise Grade Braking and Powertrain Grade Braking (Included and only available with (LV3) 4.3L EcoTec3 V6 engine or (L82) 5.3L EcoTec3 V8 engine.), Transfer case, single speed, electronic Autotrac with push button control (4WD models only), Tires, 255/70R17 all-season, blackwall, Tire, spare 255/70R17 all-season, blackwall (Included with (QBN) 255/70R17 all-season, blackwall tires.), Tire Pressure Monitoring System with Tire Fill Alert (does not apply to spare tire), Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door (Deleted with (ZW9) pickup bed delete.), Teen Driver mode a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach y