CHEVROLET 2010 HHR - Manual (Page 111)

Keys
{ WARNING:
Leaving children in a vehicle with the ignition key
is dangerous for many reasons, children or others
could be badly injured or even killed. They could
operate the power windows or other controls or
even make the vehicle move. The windows will
function with the keys in the ignition and children
could be seriously injured or killed if caught in the
path of a closing window. Do not leave the keys in
a vehicle with children.
The key can be used for the ignition and the driver’s
door lock.
The key has a transponder in the key head that matches
a decoder in the vehicle’s steering column. If a
replacement key or any additional keys are needed, you
must purchase it from your dealer/retailer.
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