what do i need for an aftermarket head-unit ? tb ext 2002 lt

[yazan]

hi ,i ordered this unit
http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1

i know that i need a dash kit , but witch one is the best ?
i have normal system / no Bose / with on star but its not working unless i am outside us , so i dont need it
and what wiring harness ? can i keep the steering wheel control ?
and the door chimes ?

thanks for any help
really need any help
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[Mark20]

I just replaced mine. I ordered a Pioneer Double DIN from Crutchfield. They may be a little more expensive but they make it clear what is included (dash kit, cable and antenna adaptor). They included:

• American International GMK-422 Dash Kit
• Metra 40-GM10 Antenna Adapter

And gave me a discount on a:

• Metra GMOS-01 Wiring Interface

I didn't need it but Metra does make steering wheel adapters.

I posted some details on how I had to assemble the dash kit. I needed to connect the two red wires together for power from the GMOS-01 interface. The main part of the interface is that it provides the warning chimes as well as OnStar You don't absolutely need that interface and can probably find a cheaper/simpler one. But key in ignition and headlight on is important to me though GM has been pretty good in protecting you from those silly mistakes.

Here's the topic I started on configuring the dash kit. I never added the promised pictures and will do so today.
http://gmtnation.com/forums/topic/12675-what-to-trim-on-ai-gmk422-mounting-kit/?p=388846