Push gas pedal all the way down for the truck to move

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. Sounds like you may have an air intake restriction or exhaust restriction making it very difficult for fuel, air and spark go mix in a meaningful combination to provide power for the cylinders of the engine to move the vehicle! That is where I would focus my attention. A shop near you can help with the diagnostic process. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.