I have a issue with my blazer I just replaced my fuel pump and I had charged the battery on a basic battery charger.then I put the battery and try to start the car it just it wants to go but won't turnover.or start. Now I had multiple people say it could be the battery so I get it charged then I call AAA and so far nothing I am beginning to think what can it be now could it be the delco anti theft and how or can it prevent my blazer from starting.

 

Did you bleed the air out of the system after replacing the pump?

Have you verified the fuel pressure is correct with the new pump?

Hook up a fuel pressure gauge to the Schraeder valve/test port. Hook a hose to the bleed valve on the gauge, and put the open end of the hose in a glass jar. Prime the system, check the pressure. It should be 60psi-66psi (for a 1996-2001 model year, VIN "W" engine). Open the bleed valve. Let the air out until some fuel runs off. You might have to have an assistant turn the key off for 15 seconds, then turn it back on to run the pump to prime again to get all the air out of the lines. It might take several prime cycles until you get fuel from the bleed valve.

 

have you verified that there is spark?
carb cleaner in intake while turning it over. if it starst, its fuel. if nothing its elsewhere