2001 blazer-80,000 miles-run ok- stranded me -got it towed home-started it and it started-then it wouldnt-so we changed the fuel filter-started up-drove it to work for 2 days no problems now back to the endless cranking.from what ive read on here it sounds like probably the fuel pump but i also read about a fuel pressure regulator-not looking forward to changing fuel pump but i read about water in the gas and we just had a huge rain???any thoughts would be very much appreciated

 

As the old saying goes: Spark and Fuel, Are you getting both?

 

Check fuel pressure

 

well the gas tank is off now i just gotta get the new fuel pump and put it in-it wasnt as hard as i thought but not in a hurry to do it again-i really hope it starts!!!

 

do you have fuel pressure at the rail. check with a fuel pressure gague. If you have none could be bad relay or bad pump. If you have fuel pressure but will not fire up could be a bad ignition control module. Check out this website to troubleshoot it.
Part 1 -GM 4.3L, 5.0L & 5.7L Ignition Control Module (ICM) Test.

Apparently they are known for going bad when they heat up. Start you but when you heat up the car you can crank with no start. Good luck

 

wow it worked!!!new fuel pump nowshes runnin-very thankfull 4 this forum