i would check out one of the big box electronic stores like crutchfield or best buy or circuit city. they more than likely have wire harnesses specifically made for installing your unit to the Chevy so that you don't have to cut any wires.
It does not have one.
Yes
No, in 2007 Chevy began putting AUX inputs in their cars.
Not on my 2006 Uplander.
The factory radio doesn't have one. I just ordered and installed an after market one I ordered from Crutchfield.
No, this function isn't introduced until 2007. Sorry!
I have an 2005, and the radio amp is under the back seat on the passenger side
If your Trailblazer is a 4x4 the switch should be to the left of the radio on the dash.
all the trim panels are held in by clips and they just simply snap off
no it doesnt you have to get an axulary output converter and tie it into any speaker wire
position number one in fuse box on driver side under the hood
position number one in fuse box on driver side under the hood