One problem related to clutch pedal/linkage has been reported for the 2006 Chevrolet HHR. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Chevrolet HHR based on all problems reported for the 2006 HHR.
When starting from a stopped position in a signal controlled left turn lane, the clutch was depressed as usual. This time it made a popping noise and the pedal went to the floor, rendering the car inoperable. The driver was left stranded in the middle of a roadway. Fortunately, this happened in a light traffic area, but could have easily occurred on the freeway or when attempting to pass another vehicle. The mechanic found the clutch master cylinder had broken out of the firewall and repaired it as best he could without pulling the engine. He stated that he discovered some reports of Chevrolet having similar issues in this and other products; however, the dealer where we purchased the vehicle had no knowledge.