Unfortunately I have to report that my wifes 08 HHR has suffered another issue.
The first problem she had was earlier this year at about 45xxx miles the ignition key wouldnt work because the ignition tumblers fell and jammed the ignition, GM covered the problem under a special warranty.
This time the Cam sensor Servo motor died, luckily the car was still driveable and all repairs were covered by GM again.
The only indicator of the problem was a check engine light, and fortunately my wife watches the gauges and lights closely.
At this time the car only has 48xxx miles and the warranty is expiring next year so if we have to many more problems the car might end up getting sold, we'll see what happens.