MTX Audio ThunderForm CXP20T Custom-Fit Enclosed Subwoofer - Chevrolet / GMC Extra Cab Pickup 1999-0... Car Speaker "1999 chevy suburban rear door" Questions

...1999 chevy suburban and you have 6 1/2" in the front doors, 5 1/4" in the 2nd row doors and 4"x10" in the rear pillars, so you shouldnt need any adaptors. i am assuming you bought the suburban stock ...