Any idea why today my traction control and check engine lights started flashing? At the same time it stumbles and misses when stepping on the gas under load. Lights stopped flashing but now check engine light stays on and the engine still stumbles. This happened all at once. Running fine one minute and then this. If anyone has any knowledge of what might be going on please don't hesitate to post!

 

I'd look at the crankshaft position sensor. These seem to be the culprit for Buicks and Fords (O-ring issue there) of intermittent problems in the beginning.