My gf has a 2001 grand am 2.4 l twin cam and the service vehicle soon light is on as well as abs light, and the trac off light is on. I took it to an autozone to have it scanned expecting some codes and it came up nothing. i know before its had problems where after driving it for a little bit it seems to lose its power on and off and it gets jumpy. any help would be appreciated and thanks in advance