I am looking to install new speakers all the way around in my dads 1999 chevy blazer lt. First thing i am not sure about was speaker sizes. I have searched for the right speaker sizes and they all say there are 6x9s. There arent any. I have looked and looked. But before i did any of this, there was two different things happening. all the speakers like to cut out at different times, and then come back on. so i think there are just pinched wires. but i probably am wrong! Should i re wire them? Help please!