need to get to school and work. went to start my truck today. shut it off and restarted it and it wouldnt run. fuel pump kicks in, battery has 12.46v. has fuel, etc. it will turn over but will not start. any common problems with the 4.3 vortec besides the fuel pump going bad (was just replaced).

 

my friend had the same problem. was his fpr. not to say it is on your truck, but give it a shot. i hear it's pretty common