Chevy 2008 silverado wont start. Changed the starter. Worked for a while, sometimes turning over right away, sometimes 2 second delay. Now wont start at all. Any thoughts to the problem?

SOURCE: 79 chevy luv, starter wont engage

Replace the cylinoid switch

SOURCE: 2003 6.0L Gas Chevy Truck hard to start turns over

check crank position sensor with proper scan tool look for cranking rpms in data.

SOURCE: intermittent starter problem, sometimes turns,

Many European cars have relays that trigger the starter,maybe yours is bad? New battery and new starter? Need to check battery connections to vehicle especially ground wire to engine block. Starter face and flywheel housing have to be clean for good ground connection.
When it won't start do you try key numerous times? Sometimes (rarely) bad keyswitch.

SOURCE: 1996 chevy silverado half ton v6 pickup problems starting

SOUND LIKE FUEL FILTER STOPPED UP.WEAK FUEL PUMP.CHECK FUEL PRESSURE.IT SHOULD BE 60 TO 66 PSI.ALSO CHECK VACUUM LINE GOING TO FUEL PRESSURE REGULATOR.MAKE SURE ITS GETTING VACUUM.IF YOU GAS IN VACUUM LINE GOING TO FUEL PRESSURE REGULATOR.REGULATOR FAULTY.IF YOUR ENGINE IS 4.3 FUEL PRESSURE SUPPOSE TO BE EITHER 41 - 47 PSI AND 58 - 64 PSI

Testimonial: "thanks will check it out some guy menchen something call the spider i gus it for the injecters"

SOURCE: 2002 chevy silverado starts right

By what your stating, that it starts and dies every time, It seems to be fuel related. You need to perform a fuel pressure check. You will need a pressure tester, one that would at least be able to read pressure to a maximum of 150 lbs of pressure. Although you really only need about 50-60 pounds of pressure to maintain proper fuel injector operation. There is a test port located on the fuel rail where you would conect the pressure tester. The test port is usually located on the drivers side of the engine near the rear section coming up from the firewall. Unscrew the pressure port cap if its still there and connect your tester. But also keep in mind you may have fuel pressure of some sort in the rail so be careful. While the tester is screwed to the test port you want to cycle the ignition key on and read pressure, you may want to repeat this several times. You must have at least 50 pounds of pressure, if so it should start. If you are losing pressure while your maintaining a visual check on the tester it could also be a faulty pressure regulator/fuel pump or even a rubber hose connection inside the fuel tank that connects the fuel pump to the fuel line. If you have any questions Im here to help. Thanks for using FIXYA