Confirmed! Tech II scanner is able to raise and lower the idle!
It’s possible for GM vehicles to get the ecm reprogrammed for the fast idle increase. your local dealer should be able to help you out. here is how it works.
Here is a step-by-step guide of how to change mileage on Mercedes-Benz W204 2009 via OBD within 5 minutes without dissembling the dashboard with V4.94 Digiprog 3 Odometer Correction Tool
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