If it's aftermarket film type tint, it's easy to remove. Get a razor blade and start at a corner and peel it up. Grab hold of the loose corner and peel back slowly and the film will come off the window. It'll smell a little funky and tt will leave a nasty, sticky mess on the window. Now you need to get yourself some ammonia diluted in water. Make it pretty strong (I forbet the exact measurements). Spray the ammonia solution onto the glass and leave it sit for a few minutes. Leave your doors open or you'll pass out when you get back in the truck. Now after the ammonia has soaked a few minutes, use the razor blade like a scraper and scrape the glue off the window. It should come right off. Re-apply the ammonia as needed to get all the glue off. After all of the glue is gone, finish the window by scrubbing it with the ammonia mixture, or Windex, on a soft cloth. No problem.