General Motors is about to launch its biggest products since 2018 in the form of the refreshed 2022 Chevrolet Silverado 1500 and 2022 GMC Sierra 1500 pickup trucks. With them comes a suite of upgrades inside and out, particularly on more premium trim levels. The big story is the added technology and refinement that can be found in the interiors, as well as improvements to the LM2 diesel and L3B turbocharged four cylinder engine. We’ve spilled no shortage of ink (pixels?) in covering these engineering improvements. And today, nearly six months after its original debut, the 2022 Chevrolet Silver…