I have a 06 pontiac gp base model. Last week I had a misfire code show up. I've gotten it before so didn't think much about it. I unhooked the negative battery cable for 15min reconnected it. Now it won't crank start or any thing. I had battery and starter.tested they're both good. I've checked fuses and relays. Also my service abs message is showing along with service traction control. Idk what to do. Any help please