General Motors's investor day on Friday provided further reason to believe that "strong execution upon management's clear and consistent strategy can continue to generate solid earnings growth despite heavy investments in autonomous driving and a more challenging macroeconomic backdrop," JPMorgan analyst Ryan Brinkman tells investors in a research note. The analyst reiterates an Overweight rating on the shares with a $53 price target. GM surprised investors by updating full year 2018 results that tracked even better than guidance, says Brinkman. He continues to see "large upside" to his December 2019 price target.