One problem related to power assist hydraulic brake has been reported for the 2008 Chevrolet HHR. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Chevrolet HHR based on all problems reported for the 2008 HHR.
Hhr ss has a hard pedal and does not stop easily on in a normal distance. This has occurred 4 times after sitting in cold weather for an extended period. It takes about a minute of warm-up to have the hard pedal-non braking to correct to normal.