What size are the factory speakers in a 2007 Chevy Silverado Crew Cab?

The factory speakers in a 2007 Chevy Silverado Crew Cab typically include 6.5-inch speakers in the front doors and 6x9-inch speakers in the rear doors. However, it's important to check the specific trim level and audio package, as variations may exist. Upgrading these speakers often improves sound quality significantly.