One problem related to water pump 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.
The car completely shut down while driving, no noise no warning, could not steer, brake, roll windows down. This happened last year. Took to dealership. Said it was my alternator and charge me an extreme high charge to replace. Very scaredy when happened, for auto to cut off like that. Luckily I was driving about 30mpr an not on an interstate. Bought 2nd hand. Have not been happy with since. When bought did not receive key fan of, an the drivers door, will lock on its own, which left me baffled how to get into it with no other key holes on any other doors or especially the backend. I feel this is very troublesome for anyone, and a bad design feature. The airbag is questionable, and now the water pump has went out, and they say the manifold has to come off to get to and want to charge 750. 00 at a car repair to fix, but will check first to see if that's for sure where leaking. Then one tire has the thing that tells if my airs okay in the tire on my dashboard. It stays on cause it fell off in the tire. The whole darn thing is a nightmare to me, that I'm stuck with. From the motor an expense it is to have worked on to the poor expensive design that got on the market. It's a nightmare.