remove rear panel to speakers???
If your speakers are bad, take it back to your local Chevrolet Dealer. This is a new vehicle and the speakers will be covered by the new car warranty. If you just want to upgrade the speakers I'd suggest having them professionally installed so you don't void the new car warranty. HTH. -Jim
Search Chevrolet Silverado 1500 Questions
Chevrolet Silverado 1500 Experts