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Message: <blockquote data-quote="regularg" data-source="post: 7244628" data-attributes="member: 631047">im not 100% sure but for the volume issue you could try this. on gm bose systems the factory headunit controls the gain on the factory amp. so if you turn it to normal listening volumes on the factory radio when you take it out and install the aftermarket one normal listening volume will be well normal listening volume. so try that reinstall your headunit and turn up the volume. if that doesnt work then your facroty amp is probably messed up.second im not sure what wires you have the steering wheel control hooked up to but you may have the wrong wire or maybe you have the wrong input on the radio perhaps.</blockquote>

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