The Honda Ridgeline Truck 4WD is a four-wheel-drive pickup truck produced by Honda. It is based on the Honda Pilot SUV, and was first introduced in 2006. It is powered by a 3.5 liter V6 engine and is available in both a 5- or 6-speed automatic transmission. The Ridgeline is offered in three trim levels: RT, RTS and RTL. Features of the Ridgeline include an In-Bed Trunk, a dual-action tailgate, and an integrated audio system.