hallo cadillac drivers, i´m new here.
i dont live in usa but i ride us cars. xD
i have a problem with my 99 Seville STS.

sometimes the engine get of (blow up) i dont now ..
when i turn the steering wheel L ore R
ore when i brake and turn left.
sometime when i stay at the trafic lights
ore when i put the windows up and stay at the brake...

every time the car is get of the rpm and volt is going down to 11.5V ore something like that and then the car is off.

the opel GM dealer sead the battery is bad but i don´t now.
have you a idea??

thenks, and sorry for my englisch i´m 20 and live in central europe. but my grand pa was live in NY

 

the vehicle should not drop below 13 v when running. i would be looking at the generator and the battery connection.
you may have a broken or leaking battery post. also check the battery cables to make sure clean and no green stuff on them