Update your semi truck with a simplified means to raise or lower a liftgate, with the Maxon 2-3/4" × 10" Tuck Under GPT-25 / GPT-3 Cylinder that ensures you're Ready for the Road Ahead™. With a tuck under design, this replacement device works to pump hydraulic fluid into a cylinder to either lift or let down a tailgate. Fashioned with a compact design to maximize cargo space. FleetPride is your First Click in Heavy Duty®.