I have a 2001 blazer vortech v6. Problem is when the truck sits for about 2 days it wont start. It will start if it gets started everyday. First I replaced the fuel pump and that didnt help. I have also had the fuel pressure checked and its 60 where it should be with know presure loss. Its in the shop right now and their not sure what the problem is. Everytime they put the fuel pressure gauge on it reads 60 and the truck starts. Please help thanks

 

Other likely issues:
Ignition switch
Crankshaft position sensor

 

try changing the coolant temp sensor i had that problem on a astro van 4.3 ,i changed everything under the sun & it turned out to be the temp sensor it gives the computer a false reading .try it its only $20.00 and easy to change .good luck