Putting Stereo In 1989 Chevy C 1500

So your saying its a full range box that has two woofers and two tweeters on it and that its ported. If this is your case then you will probobly want a 2 channel amp to power your box. you will also want an amp wiring kit from someone like Stinger or Streetwire. An amp kit includes an rca cable ,a power cable (you connect this to the red positive terminal on your battery) a ground cable which you attach to the amp and then the chassis of your car, a turn on lead ( which you will have to run to your new cd player so your amp will turn on when your radio does) , and various connectors you can crimp onto the end of the power ,ground ,and turn on lead cables. If your woofers handle 350 watts max you wont need that big of an amp. Probobly only a 125 watts continuous X 2. Rockford Fosgate makes one. The Punch 301S brigdged to power your two woofers will output 150 watts continuous to each woofer. You can run your tweeters off of your head unit which should give them plenty of power. Since you didnt mention anything about midranges you will just have to use your dash speakers for that. If you do have midranges in your box then you can for instance get a four channel amp and use 2 of its channels for the woofers and the other 2 you can use for the midranges and tweeters. Hope this helps you.

I just wanted to add on to this post. I have the same truck and was wondering how to install a stereo myself here. I am glad I found this place with the lead on teh schosche parts. I just ordered the following parts from sounddomain.com

Scosche GM02 Car Stereo Wiring Harness

Scosche GM1482 Car Stereo Installation Kit

Scosche MDA1 Antenna Adapter

After I ordered I found this Part # SCOGM1518B. It is a little storage place that can go in place of the stock radio..

Just wanted to pass on and say thanks.