It’s no secret that General Motors has been investing heavily into building electric vehicles with a massive wave of cars on the way. However, at least two of its brands, GMC and Chevrolet, won’t be quick on the draw to turn electric. And that’s probably because of the expansive truck and SUV portfolio. According to the latest reports, the two brands will continue to offer gasoline-powered vehicles alongside BEVs for at least a few more years. Chevrolet and GMC: Plans For The FutureThe Chevrolet Silverado EV is expected to go on sale next spring. Meanwhile, GMC is set to debut the Sierra EV in…