One problem related to engine noise has been reported for the 2007 Chevrolet HHR. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Chevrolet HHR based on all problems reported for the 2007 HHR.
Approximately 6 weeks ago, I was driving my Chevrolet Hhr 2007, (40 mph), when traction control light came on, and the info showed traction control off, and then service traction, at the same time I could hear and feel the car was shifting hard. It was like kicking. I parked, turned off the car and turned on again, and the light disappear but after few hours, it was there again, shortly after the engine light came on with the info check engine, and stayed on with the traction control light, then this disappear but the engine light stayed. Also the car has made noise since 2008 when my husband bought it. I don't know if both problems are related. On 10/15/14 I went to the dealer because my car has 5 different recalls to fix, and the service traction light was on, they didn't check it, they said if I want them check it, I have to paid for the inspection. Looks Chevrolet it doesn't care about their customers safety!.