On my 2000 SS would i be able to replace my rear hatch speakers, with a nice set of aftermarket tweeters?? are they 2 or 4 ohm?

 

Do you have the monsoon system? Check them with a meter and you can find out.

 

The GM service manual for 2000 shows the rear quarter tweeters as 4 ohms and the woofers as 2 ohms.

 

Here they are, depending on how many speakers he has in the rear. You can download the entire manual here: https://www.mediafire.com/?40mfgeoe4ctti