Ignition Switch is fairly easy, the Ignition Lock Cylinder (key) is a little more difficult
Here is Chevrolet procedures for both
click links below
REMOVE IGNITION SWITCH
REPLACE KEY CYLINDER
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Any response about the dash warning lights in regards XXXXX XXXXX key switch?
There was nothing posted about that
Your question states:
How and how difficult is it to replace ignition switch in 09 HHR?
Please expand on your added info............