Ignition noise thru stereo even when radio is in off position--less when radio is on with volume control at lowest level.
The website that I am referring you to specializes in noise prevention in your sound system. If you click on the link and scroll almost down to the bottom of the page there is a section specific on ignition noise through your stereo. http://www.termpro.com/articles/noise.html Hope that helps!
your car has a bult in sound supresion sys. i think you have a short in you sterio sys . be it in the head unit or in the harness
You most likely have a short or unshielded wire that is allowing interference or electrical noise to be transmitted. It is in all speakers, or just one in particular?
Looking for a Used Monte Carlo in your area?
CarGurus has 1,689 nationwide Monte Carlo listings starting at $2,491.
Search Chevrolet Monte Carlo Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Chevrolet Monte Carlo Experts