I’ve had some Issue with this 2009 HHR. It comes with a 6 system Speaker system. Most of the year the 4 Back Speakers don’t play. Just the Two front Tweeters. Almost never in the winter. Every now & Then the Front Speakers Comes on. Sometimes just One side Play but not the Rear … Also, The Wheel Readings Have them All Crossed up. Like the Left Front might Actually be the Right Rear. and the Left Rear might be the right front. (They Don’t change just off) I Put Larger Tires on it a while back. But don’t see how this would effect the radio.
Any Clue. I’ve Check All the Fuses. Giggle the Wires I could Reach. New Battery Last Year. Radio Down For Over a year maybe two.
I do Get Music more in the Summer Hot weather.