I have an 07 SE. It had the SMOD. I bypassed the radiator and installed a new valve body. Got an ebay valve body that came programmed. After installing the valve body the car 1.) had a 4WD light, 2.) would not move out of what appears to be 4 Lo, 3.) shifted very rough, 4.) then the next morning is in no crank, no start. Checked fuses they look good.
Ebay seller of the valve body says it may need to be flashed again. Anything else I could check first? I have not pulled any codes yet.