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03 chev silverado radio on but no sound

Factory radio - turn on+ all displays + functions buttons seem to work
but no sound from speakers.
i shut off truck at work -8 hours later start up + no sound
displays light up- vol. display goes up/down -tuner finds station
scanner scans -etc. but no sound!!!

got any ideas? thanks...


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  • 379 Answers

Studying the radio schematics , i'm seeing a radio amp fuse under the hood ,in the main fuse box under hood , 30 amp , check that for starters , if the amp was out you would only lose sound , would like to get a fix ya vote , comment back because i have other thoughts on your schematics , and do you know if its the base model or premium sound , with or without cd ? , thanks .

Posted on Jan 11, 2009

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Does your GM car or truck Radio display LOC and does not turn on? Chevrolet, Buick, Pontiac, GMC, Cadillac, Oldsmobile vehicles used a theft system to lock the radio when power is lost. This system was used from the ealy 1990's to the early 2000's.
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Instructions:
  1. If your radio displays the word LOC, you can retrieve a set of factory numbers in the radio that enable you to get a backup unlock code. If the radio says INOP, you will have to leave the key in the "ON" position, or let the car run for at least 1 hour before you attempt any unlock procedure. INOP means a secondary theft lock due to too many false attempts to unlock the radio.
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