2008 LS3 42,000 Km, have owned the car 5 years with no problems but now when i start it, it will run for a few seconds and the engine just quits, everything goes black on the dash and will not restart. After a few seconds everything seems to reset and i get the check engine light, low engine power, check traction control. low fuel warnngs on the dash, after it shuts down. When the ignition (green light) comes on the start button i try to restart it and everything just goes black on the dash again. If i press on accessory then shut it off sometimes it will start other times it wont. When the engine is running the alternator is putting out 14.4 volts , battery is always on a tender and right up to charge and the cables are tight on the terminals. The car is not throwing any codes according to the code reader, nada ... anyone out there had similar problems? .Last week i had to change the accelerator pedal because i had a code on the sensor on the pedal, reset the code and it ran fine after that, the next time i went to use the car this problem started up again. Before i changed the accelerator pedal it was doing the same thing but at least it was throwing the code for the pedal throttle sensor .. any help would be appreciated...