I have a 2011 chevy Tahoe , the brake light comes on the abs light come on the traction symbol comes on the traction control service comes across my screen. The speedometer goes nut bouncing from 0 to 60 to 50 all over the place can't eve tell how fast I'm going. I lose power. When I push the pedal nothing! I'm stuck going 20 to 30 miles and barely make it up a hill having absolutely not power. Very dangerous. Sometime the locks will unlock and lock but rarely. It will also shift very hard on its own and jerk you forward. I can park the car and the next day will run perfect then for 2 weeks straight it acts up then stop again then start again. Have spoke with GM personally and they say they have never heard of this problem and no one has complained about it which I find to be a lie considering there is a rep from GM responding to people's post on here. I have taken the Tahoe in 8 different times and after 2000.00 replacing the ecm, bcm, negative battery cable, fuel pump, fuel pump module it is still tore up. Have reprogrammed the computers and still no change. Any ideas??? Anyone find what works??? Please help!!!