HP Tuners has a repository of stock & usually, modified tunes for our Cobalts. Free to download.
Unfortunately, I don't see any modified tunes for 2010, but there are a lot for the LSJ engines.
HP Tuners, the home of VCM Suite and the MPVI since 2003. Now enhancing these to new heights with a new feature rich VCM Editor and VCM Scanner, coupled together with the latest generation MPVI2, this is only tuning and diagnostic solution you’ll ever need for your modern OBDII vehicle.
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