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09 Sierra rear speaker static/low sound


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I have a 2009 GMC Sierra 1500 Crew cab, I'm guessing it doesnt have the Bose system as it doesnt say Bose on the speakers or the head unit.

 

I recently had my truck shipped overseas and it had no problems before it was shipped, after however both rear speakers have been a problem. I swapped out the factory head unit with an after market unit and when testing each speaker I noticed the rear speakers do not put out any bass and they have a static sound to them as well as arent loud at all. I figured the people shipping my truck decided to blast the radio and blew the speakers so I bought new speakers from crutchfield. After installing them I noticed the problem is still there, so I plugged in the factory head unit and still no luck. I can not figure out why on my rear speakers sound like crap.

 

I see everyone saying if my speaker covers or head unit don't say Bose then I don't have any amp. Yet my amp minifuse has a fuse in it's slot and it's always been there, so maybe I do have an amp?

 

I've pulled the head unit and checked all the wires in the factory plug to make sure there were no loose wires, I also checked to make sure none were corroded. Just can't seem to find out what is causing the low noise level and the static.

 

Any suggestions??

 

Thanks in advance for the help!

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sounds like you've already checked everything, and even when switching back to oem stereo it still does it. That's weird. You've changed the stereo and the speakers and only the front sounds good. Seems like it has to be a bad wire somewhere shorting going to the rear speakers.

 

Idk hopefully someone has some better opinions for you. Sorry I'm not much help. Good luck bud

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Yeah, changed the rear speakers out for new ones and even went back to the factory stereo. I even went as far as checking the speakers by attaching them to the front doors and they sound great. Checked all the wiring for loose wires and corrasion and nothing looked bad at all. Testing the minifuse for the stereo and the one in the amp fuse, even swapped them with new fuses just in case. For the life of me I can figure out whats going on.

 

I guess I may just pull the center console and see if there is an amp...

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