extended cab?
Depending on what kind of truck like the Silverado with a 3rd door, or if it has full open doors, gotta take the door off, I think that's where the speakers are at. Look for screws and bolts, take out the screws and make sure all of them are out. Check the finger spots where you shut the door too. Once your positive all screws are out then the rest are just plastic pieces that just need to be pulled out, then pushed back into place.