Hello, I am seeking some information. I am planning on replacing the existing clutch, pressure plate and slave cylinder on my truck. I can only find aftermarket kits. I am looking to know if I should be going with a self adjusting or non self adjusting pressure plate? I am not sure what is in the truck. I’d just like to order the parts prior if possible. My local dealership could not help. The truck is a 2003 Chevrolet Silverado 2500HD 8.1L 6spd ML6 (ZF6 transmission)
also it is a stock truck.