The 2002 Chevy Avalanche does not have an AUX input in the vehicle. This was a bit too early and was before AUX inputs became standard accessories on vehicles. If You do want to add an AUX input there are third party solutions that are available. These will connect to the nine pin adapter on the back of Your stock head unit that would normally be used for a CD player. They will give You a USB port and a 3.5mm auxiliary input as well. If You want even more functionality You can also change the head unit out for a new one that can add bluetooth and other newer technologies.
Gary J
July 16, 2020
The 2002 Chevy avalanche aux input location is on the dash board of the vehicle, look for the 3.5 Mm audio jack.
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