What is your question?
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What is your question?
My radio sounds faint and distant and we have been over the manual and tried everything. The back radio comes on but won't produce any sound at all. I don't know what to do
What makes this problem better or worse?
Nothing at all
How long has your 2004 GMC Envoy had this problem?
2 yearrs

You can also go to owners manual index - in rear of book - see > FUSES.
https://www.autogenius.info/gmc-envoy-2003-2004-fuse-box-diagram/ Happy motoring!