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My car stereo has a CD error but theres no CD inside. And I unplug the stereo because it runs the battery down. And it won’t even let CD in…it looks like the gears or something wont let it in…Its a 2008 Buick enclave stereo. Any help would be appreciated

Check to see if the model number for the stereo is a recalled item. Many electronics were outsourced and then installed into the automobile. Warranty or not, seems as if the stereo has been tampered with. Best to buy a new one.