For basic in dash units:
(Great unit for the price, and features are amazing)
Pioneer Premier DEH-P510UB AM/FM/MP3/WMA/USB *NEW 2009 - eBay (item 110428941609 end time Sep-26-09 23:07:43 PDT)
You will need a GM Dash kit:
Metra Electronics - GM In-Dash Installation Kit - 1982-UP - BB444GM
And a GM Wiring adapter:
Metra Electronics - GM Wiring Harness - 1988-2004 - BBWHGM2
& An Antenna Adapter:
http://www.bestbuy.com/site/olspage....=1186006384315
As far as installing this stuff... it's cake, just take your time.
If you want to change out the speakers, for a budget speaker with decent sound.. look into MTX speakers, Ebay has great deals on them, I'm currently running two MTX Thunder 6x9's and they sound great, cost me $40 shipped.
Any other questions, let me know.
