General Motors continues to drape the truck market with a two-pronged brand strategy that has effectively been funding the company’s multi-billion dollar transition into a full-line EV maker. Further playing into the hand of America’s largest automaker, demand for trucks -specifically of the most premium variety – continues to surge. This is in the face of a starved vehicle inventory, economic volatility, and various parts shortages. For GMC, that means rabid demand for its top-shelf Sierra Denali pickup truck franchise, as well as its foray into the off-road space with the expanding AT4 and e…