Chevy 3500 turns over fine but is hard to start when engine gets hot. Not the starter. It turns over fine but will not start and have to crank the starter lots of times before it will start.?

If your Chevy 3500 is hard to start when the engine is hot, it could be due to several issues. One common cause is vapor lock, where the fuel vaporizes in the lines, preventing proper fuel flow to the engine. Another possibility is a failing fuel pump or fuel pressure regulator that struggles to maintain pressure when hot. Additionally, check the ignition system components, such as the ignition coil or spark plugs, as heat can affect their performance.