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Silverado 1500 crew cab door speakers intermittent

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Any help on this would be much appreciated. My rear speakers in my truck have never worked since I got the truck about a year ago. I am in the military and return from a 30 day deployment and all the sudden my front speakers in my door both don't work either, the only thing that works is my tweeters near the windshield. My first course of action was to check fuses, I replace a fuse that was still good but it just had some corrosion and all the sudden all the speakers work... for 20 min give or take then all 4 door speakers go out at the same time. I have since checked all the fuses and they are good. The following drive the 4 speakers were still out then came back on, it seems if they are mid to high level its almost as if a component is getting too hot therefor shuts down to protect itself then comes back on when able. However I've turned the car off for the night then back on and all 4 are still out so it doesn't have any constants that I can see.


I've narrowed it down to the following: head unit, amp, fuse panel/fuse or wiring/wiring harness.


I've read on forums to replace the speakers but other than solder I cant see how that would work being that at certain times it works perfectly.



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