By Bret Kenwell Shares of General Motors are racing higher after an earnings beat. Can it drive through resistance? Here’s the level to know now. Shares of General Motors (GM) – Get General Motors Company Report traded higher on Tuesday, up 3.6% after the auto giant reported earnings before the open. It’s up another 2.5% at last check Wednesday. The company reported a 49% year-over-year surge in earnings to breeze past analysts’ expectations. Revenue jumped more than 50% and slightly missed estimates. Still, the company reported record sales in the quarter and reiterated its full-year outlook….