Where is the fuel tank pressure sensor on a 2002 Chevy silverado?

The fuel tank pressure sensor (FTPS) on a 2002 Chevy Silverado is integrated into the fuel pump module assembly inside the fuel tank. You won't find it as a separate component easily accessible under the vehicle. To access it, you'll need to drop the fuel tank. This is a job best left to a mechanic unless you're experienced with fuel system repairs.