My 2000 Blazer was running fine until the starter went out on me one day. So I replaced it ( in the grocery store parking lot) and she started right back up and drive home no problem. The next day I drove it to work fine however, when I started home it started bogging down like it was about to run out of gas. If I press the clutch in and rev the engine I can get her going again. Luckily made it home. It will start and idle no problem but now as soon as I drive 10 feet it wants to die on me. I did replace the fuel pump a couple of months ago so pretty sure that's not it. I am thinking maybe the fuel filter? Any help is greatly appreciated thanks in advance.

 

Check fuel pressure and leakdown. This thread explains: https://blazerforum.com/forum/2nd-gen-s-series-1995-2005-tech-41/how-check-regulated-fuel-pressure-pump-max-output-leakdown-88305/ Post all 4 readings and We can help you analyze them.