I have a 96 blazer. It was running fine yesterday, but when I went to start it up today I got nothing. It cranks over, but doesn't even attempt to start. I think its the fuel pump because I have about 137k and I believe its still the original pump. Now when I turn the key to the on position I can hear the fuel pump turn on, but it doesnt turn off. Does this mean the pump is bad or is it a relay or something? Any help would be great. Thanks.

 

Well, as long as the key is turned on, so is the fuel pump. Are you familiar with how to do the standard fuel pressure test procedure?