I have the 2011 chevy equinox Lt with a 2.4l. I had put new tires on it and had it aligned. The next day the miss alignment light came on then the brake light came on then the traction control light came on. So I thought wth, so I pulled the neg post off the battery, tapped it three times back on thinking I'd reset the lights/computer. It hasn't started since. I did find that there was no fire to one of the ecm fuses so I replaced the entire fuse block bc I'd seen on here that they can short out. Well now I have fire to the ecm fuses and all the rest of the fuses but it still just turns over but not start. I've got fuel pressure, I've changed out the ignition switch. I don't know what to check now. Ecm fried?

 

Why did you tap it on 3 times? I never heard of that. Taking off the cable and leaving it off for about 15 minutes is the correct procedure. Looks like you did fry something.