Re: 04 Sierra No Aux on Radio (factory avail?)
The aux button was for a remote cassette player(that your truck may or may not have). The aux input wasn’t available until the next generation of trucks(2007).
There are companies hat add aux inputs to older radios. I have 2 from 1factory radio for my 96 and 99. They work great. They look factory and they play everything. They look a lot better than the cheesey aftermarket radios.
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