sub amp hook up

hey guys, im new here, im hooking up an amp and sub into my buddies 2001 olds' alero but he want's to keep the stock radio in there for now. it is not a bose system so i know it won't be all that hard, but i was just wondering if you guys would know good sites to buy the adapter for the radio at. and how hard is it to acess the radio... simple pop and pull? or is it a full dash removal...thanks for the replies in advance guys i appriciate it

-drew

The stock radio in the alero will not have pre-outs. If you want to keep the same radio but install an amp, just make sure that the amp has speaker line inputs...Any good amp will have those. It's that simple.