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AM Radio noise problem.

sefiroxx

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sefiroxx Enthusiast

sefiroxx

Posted
Posted

2004 Sierra 4.8 SLE
 
Been having a am radio problem that is slowly getting worse. Decided to focus on symptoms a couple of weeks ago to rule out causes
 
( I have background in electronics and mechanical work and have installed a few radios over the years so figured it was time to solve this)
 
OEM stock radio with BOSE option
 
Symptoms
-FM fine
-AM short distance only
- engine noise is coming thru on AM only (low static)
- operating passenger window sends aoad whine through the System rhyme the driver window buzz is faint.
- have installed a couple of accessory USB ports. No change when they are uninstalled (they are wired to the rear cigarette lighter)
 
Figure there is a common ground between the window and radio. May have to put a power filter in. Anyone else run into this?


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