radio on 2001 Chevrolet Monte Carlo

radio makes crakling noise even with the engine off. What could be the problem?

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1 answer 6 comments
Is the key all the way off? if so it may be a wiring issue
yes key is all the way off. What kind of wiring problem could it be?
is it the original radio

yes..just had a new controller put in...could this be the problem?
could be since you did not have the problem before