Chevrolet HHR owners have reported 1 problem related to diesel engine (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Chevrolet HHR based on all problems reported for the HHR.
2007 Chevrolet Hhr had a catastrophic engine problem. The master cylinder was not supplying combustion to the third valve of the four valve engine. Which meant no remote control start, it sounded like a diesel engine and the gas mileage had dropped from 32 to 24 miles per gallon.
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all problems of the 2007 Chevrolet HHR
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