Have a 1993 Chevy S-10 Blazer with 4.3L CFMI motor. Turns over but won't start. Pulled plugs and am getting fire. Checked fuel line and was not getting fuel from tank. Dropped tank and replaced fuel pump. 5 Hours and $100 later still not working. Tested old pump and it works. I am looking for the fuel pump relay to try and test fuel pump or any suggestions on what problem might be. Looked in Chilton's and Haynes manuals and both show fuel pump relay to be in "Convenience Center" located under center of dash, but have had no luck finding it - So much for a "Convenience Center". Any help would be greatly appreciated.