significance of Pyramid Truck, Etc.

Kilgore catches a prolonged ride out of New York City aboard a commercial truck. The truck's side is emblazoned with the word 'Pyramid'. It has a 324-horse-power Cummins Diesel engine, 13-speed transmission, a turbocharger, hydraulic steering and air brakes. It cost $28,000. Kilgore mentions to the truck's driver that the pyramids are huge and haven't moved an inch in thousands of years and therefore make a particularly unsuitable name for a trucking company. The driver responds by mentioning that pyramid is a good-sounding name. Other trucks' advertising slogans are noticed and commented on by various characters throughout the novel.