2011 Chevrolet Malibu Question about aux jack

Where did you find a car without a radio? The jack you're after is built into some radios, then the unit you're playing sends the audio signals into the radio to be amplified, then sent to the speakers. You need the radio for that. I'm not aware of anything less-involved. The designers would have to spend a lot of time and research to develop such a product, then they would find they could add the common and simple radio to easily add value to the product. This would be like building a car with no seats. Sure, they could do it, but they're already pretty good at building seats, so it wouldn't take much to include them and raise the value of the car.

Just out of curiosity, what did they have to do to remove the radio? GM pulled a dirty trick on their unsuspecting customers starting with some 2002 trucks where they built the Body Computer into the radio to force people to go back to the dealer for very expensive repairs rather than install aftermarket radios. They started that a few years later in the cars, but I thought that involved all models by 2011. Without the radio there would be no chime, instrument cluster, turn signal click, power windows, and things like that.

At any rate, I'm still not aware of the box you're looking for. There would be no reason for a company to design and build one when a less-expensive radio will do the same thing and more. The first place I would suggest looking is "Crutchfield. That is a mail order company that deals in all kinds of audio products. They also carry solutions to a lot of the tricks manufacturers pull on us like that Body Computer issue. What you also might look for is an aftermarket replacement remote amplifier for a GM or Ford product. Half of their radio models must be used with a separate amplifier or you will barely be able to hear it. Chrysler uses remote amplifiers too but they perform a different purpose. Those don't increase volume. All their radios already drive speakers directly or with the amp. The amps simply modify the tone response for the shape of the vehicle.

Most high-end aftermarket radios can drive speakers directly, but they also have cables that provide a low-level signal that has to be amplified, presumably with those miserable thumping noise boxes the kids put in their cars. You don't need that kind of amp, but some of those radios DO need to be paired with some kind of amplifier even for normal use. That again is what you might find at Crutchfield. Try Best Buy too