I've got a 98 silverado c1500 5.0 I've been throughout the truck in all areas maintenance wise I will say I gained almost 10 psi on fuel pressure after changing filter I blew through the old one it barely moved any air and it was only 3 years old these trucks need 55 psi to start and run
Run a bottle of redline or gumout anything that has PEA in it keeps the carbon off the poppets and also withstands the cylinder temperature cleaning rings and piston tops
