It will tell you in your owners manual if you have it.
radio is screwed up.
look in your owners manual.
With the radio presets
Look in your owners manual as it will tell you.
with satnav/display it's a Double DIN.
I tried to decode my radio the trouble is i had 4 attemps and an error is showing how do i solve the problem
I believe if I remember right a AM radio was standard and if you wanted AM-FM it was an option as was a 8 track player.
The '06s didn't have an Aux Jack input on the stock radios.
Look on the fuse cover as they are described there. Be sure to check the fuse box in the trunk too.
Plug a booster pack or car charger with a power point adapter into the power point (cigar lighter) of you vehicle before disconnecting the battery. This will keep power to your radio and security system. The bonus is it will even save you radio presets.
If you want a factory one from back in 68 good luck finding it as most cars in 68 came with just AM radios, if you want something after market that will work look in best buy or a radio repair shop.