Ustacould

I have a 2003 Sable with the 3.0 liter DOHC. While driving on the highway and running either A/C or heater at max fan with Radio on, the car engine will die or stall violently jerking the car with all warning lights on and then continue OK. This happens at random but semi-frequent intervals. The more electronics I turn off, the less it happens but it happens all the same. No error codes or engine lights are displayed after the fact. (In one instance, it also seemed to make the AC over heat.) The radio will also turn on and off and automatically change volume as a forewarning to the sudden stall on the highway. (It has also stalled and died under similar conditions at slow speeds.) (Any suggestions will be greatly appreciated, thanks in advance.)