One problem related to vehicle overheat 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.
Since around the beginning of this year, our heater went out and the coolant system has not worked properly to cool the engine causing the car to go hot after about only driving 5 miles. Not to mention, I can't locate the thermostat housing compartment in the car. It appears that this department has been bypassed. After doing some research on the gm Hhr cars, it appears that I am along with many other Hhr owners are experiencing the same issue(s) with this particular car having overheating problems. Gm really needs to evaluate this problem and recall these cars for repairs.