The hook up.
I would highly recommend Crutchfield. (Maybe we need to inquire to them to possibly become a supporting vendor. That would be sweet.) They might be slightly higher priced on their products, but you get a lot more free stuff than you would buying anywhere else. When you buy a head unit, they give you a radio pod installation kit and all the OEM adapter wiring harnesses for free. When you buy speakers, they give you installation brackets and OEM adapter wiring splices for free. Not too mention they will give you very detailed installation instructions that are vehicle specific, with pictures. I recently purchased some items from them and I am very happy I did. Free SAP adaptors for my speakers, free wiring adapter harnesses for the speakers and the head unit, and a very detailed installation manual.
If you upgrade to 6x9s, you will need these.
GM SAPs 4x10 to 6''x9'' at Crutchfield.com
Here is the hook up for our cars as far as everything they sell that will fit.
Find Car Audio/Video Gear that Fits Your Vehicle at Crutchfield!
For the price, you can't beat these Infinity Reference 9613i 6x9 3 ways.
Details:
» 3-way 6"x9" speakers (pair)
» Plus One+ poly woofer cone with high-roll rubber surround
» silk dome tweeter and midrange
» power range: 2-100 watts RMS (300 watts peak power)
» frequency response: 46-21,000 Hz
» sensitivity: 92 dB
» top-mount depth: 3"
» warranty: 1 year
I installed these in place of my factory 4x10s pushed by a Kenwood KRC-335 that has 22w RMS / 45w peak x4 channels and they sounded great compared to stock. Then I went with an Infinity Reference 7521a amp to power them.
Infinity Reference 7521a 2-channel car amplifier 97 watts RMS x 2 at Crutchfield.com
Holy Cow these 6x9s rock with this amp!!!
IMHO you can't beat this combo for crystal clear highs, mids and plenty of bass for the price. Now, I'm not a rep for Crutchfield, but me being into Sales and Customer Service for the past 14 years, I can say this about them, these guys have to be one of the best companies I have ever dealt with. Excellent Customer Service, Tech support, detailed installation manuals and free stuff. "Free Stuff"!!! I will snap a few pictures of SAP adapters and the speakers installed on my T tonight and post them up.
Hope this helps.
Patrick