99 silverado V6 4300 Vortec won't start it has spark I've changed the distributor cap and rotor spark plugs and wires PCV valve and battery now what?
try changing your fuel filter.
I own a 93 Chevy Silverado K1500 4x4 with V8 350 TBI 5.7L. so unless Chevy has changed their blocks, i would suggest that naturally your block is a SB 350. However, since your question was about horsepower, not which block you have, I will tell you the horsepower. The 1998 Vortec 5.7 liter makes 255 horsepower.