[70x7]

is it possible that onstar can update the computer remotely to fix this over compensation?

I just ask because of all these threads about lower mpg than previous trips...
Im one of those. The DIC was showing about 3-4mpg higher than if I did the ol fashion math method. Now, they are spot on.

 

[70x7]

...
...and, "No," On-Star™ cannot "flash-update" the BCM (Body Control Module).

"ok", "thanks"

lol