Originally Posted by Haelan
If they are suspicious they may connect to the ECU and can tell it was flashed. I had a ball-busting dealership do this to me when I first purchased my vehicle and wanted to pay them to replace the rear struts. They basically refused to do any work on the vehicle (even mechanical) since the vehicle had been modified at one point.
Side note. Anyone living in NW Indiana stay away from the Portage dealership. Go to the one in Merrillville.
Just FYI, but that's not legal. They cannot refuse to work on your suspension because you modified the engine. You could have called SOA.