I ended up just replacing the factory radio with an aftermarket unit. No more high-pitch constant ringing! Just wish GM would stand behind their products.

 

I had that too on sierra sle 2012 new $35k sticker. Happens key in or out- ear facing the radio. Earnhardt GMC in Phoenix.

First visit said it was transmission solenoid- nothing could be done.

Second visit said it was CD player motor- nothing could be done; offered to buy my truck for $12K less than sticker, only 2 months on the road.

Third visit I asked them to pull the stereo and put it on the passenger seat. Sound went away. Plugged the radio back in, sound reappeared. I think it is related to bluetooth. Offered to sell me a stereo with touchscreen for $2200.

It is the third and last new $25k plus car I bought from Earnhardt in the last 2 years.

 

Just brought home a 2013 GMC Sierra SLT with the Bose stereo and I too have the high pitch squeal. It took me all of about 4 hours in the truck to pick it up but I can't ignore it now. I hope that the dealer/GM will take care of this problem.

 

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Please keep us posted of the results of your dealer visit.

Feel free to contact me privately if you have additional questions.

Louis
GM Customer Service

 

Do yourself a favor and bring the truck back right away!!! I did get mine fixed but it took me 3 months and hundreds of phone calls. GM has a great customer service if you need a oil change, not so good if you do have a real problem.

 

Hoping for the best. As you saw from posts above, I also had the problem you are having. GM did not stand behind their product and I ended up replacing the radio on my own dime. Truck is great but the way GM handled my case was absolutely deplorable. I was thinking about getting a Camaro some day, and GM helped me make up my mind with that idea.

 

Hey, the GM dealers in Texas won't acknowledge this noise and basically tell me I'm crazy. Does anyone have anything from a dealer acknowledging this noise that I can show them? Thanks,

 

Tell your dealer to look-up PIT5166A

 

Only issue with that bulletin is it tells them not to do anything about it..

 

I know.. They recognize that there’s an issue but are trying to stall as long as possible in hopes that your warranty will run out.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>