When your GMC PB2500 Series was born, it was destined for a driver who prioritizes longevity in their automobile. The vehicle in your driveway symbolizes the best in class compared to all the other vehicles currently being driven today. You purchased your PB2500 Series because its reliability and trusted quality struck a chord inside you; so why would you be okay with second best when it comes to superior quality auto parts? While it may not be difficult to buy replacement parts for GMC vehicles, these days the necessity for nothing but the absolute best are required to repair your car or truck.
A lack of proper lubrication for your internal engine components can result in intense friction and heat and lead to total engine failure. The moments where your engine's main caps meet the crankshaft are where all the friction and heat come from, and that is why your GMC PB2500 Series main bearings are installed there. These main bearings are made from a composite metal called Babbitt (iron, zinc, copper, aluminum, and more), which is just slightly softer than the forged or cast crankshaft and the main caps in your GMC PB2500 Series. Most bearings are cast with lubrication channels, so very little friction is created around the engine main bearings and they will last the life of the vehicle.
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