This sounds like you have something like a cloth stuck in the latch. Once you hear the click try to pull up on the trunk lid. If you still cannot get it open remove the rear seat and crawl into the truck and unbolt the latch so you can get a better idea of what is stuck and causing the problem.
Let us know what happens and please upload pictures or videos of the problem.
Monday, April 30th, 2018 AT 11:32 AM