I dont know what it is called. I can tell you I got the work done at Coral Hummer in Pompano Beach Florida. They did keep my truck for about a week working on the problem. When I picked up they advised they had called the factory several times to find a solution. Eventually they downloaded the other programming. As I said, it really smoothed out the shifts on cruise control. And the mileage is holding steady. I agree with the statements about them needing a push to do it. I wonder if this is the factory doing their own performance tune like the proflash or predator. More power means more stress on the engine/trans during the warranty. Maybe it explains their hesitation?
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2004 Lux with 6 inch Fabtech with tie rods, 38 inch MT's, 4:88 gears, and some minor engine tweaks.
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