Hi there, i have a chevy express 2001 and i want to change my speaker in my door. I dont know wicxh size so i already have and what brand / size of speaker should i buy.

thank you

 

the size for the front doors is 6-3/4 " inches, I got this info from crutchfield.com prior to purchasing after market speakers, as far as name brand, there are various aftermarket manufacturers i.e. sony, pioneer, kenwood,...hope this helps.