So I'm driving to work this morning I press the rear defrost button for the first time this year, and my radio went dead. I don't mean that it just shut off, I mean no lights on the display and the overhead OnStar panel went out. Not only that but the defrost light came on but the defroster did not work. No voltages at the defroster connectors. All fuses are good. All electrical connections are solid. The only electrical changes to my car since the last time I used the rear defroster was I installed the GM fog light kit, and had the dealership flash the BCM. Is it possible something went wrong with the flashing?
No intake hardware or new exhaust makes any difference...not like the older cars with carbs...everything is sensor or electronically controlled. Properly inflated tires and synthetic oil will help a bit..but generally speaking if you want a faster car then you pretty well need to buy a faster car.