No start on 03 Alero

[SHOOTER79]

Quick background.
Had security light flashing. Then went solid and car is no start even with the 10 minute wait.
1. Changed key cylinder housing and light is no longer on or flashing. Car still wont start.
2. Sprayed the throttle body... started for a moment.
3. Changed the relay because there was intermittant buzzing from there and no start.
4. Checked the schrader valve on the fuel line and no pressure at all.
5. Changed the fuel pump. Once in a while you could hear the old fuel pump run when you turned the key on but now the new one doesnt at all and there is still no fuel.
6. Tested the injectors for power and there is.
7. Tested the plug on the bottom of the car and there was 5v to 2 pins. Will check for 12v tomorrow at pump.

What else could this be? Could it be the BCM? The key cylinder itself without flashing the security light? Is there another relay for the fuel besides the one in the fuse box under the hood?
Thank you all and I hope that someone can help soon!
Travis

[BNaylor]

BCM is a possibility. Test with a GM Tech 2 scan tool to be sure.

When the Passlock VATS immobilizer kicks in the PCM module disables the pulse width modulation injector signal to the fuel injectors. You may have 12 volts at the injectors but they spray when the PCM sends the low signal.

[spike994]

I have the same problem, did the BCM fix it.

Originally Posted by SHOOTER79

Quick background.
Had security light flashing. Then went solid and car is no start even with the 10 minute wait.
1. Changed key cylinder housing and light is no longer on or flashing. Car still wont start.
2. Sprayed the throttle body... started for a moment.
3. Changed the relay because there was intermittant buzzing from there and no start.
4. Checked the schrader valve on the fuel line and no pressure at all.
5. Changed the fuel pump. Once in a while you could hear the old fuel pump run when you turned the key on but now the new one doesnt at all and there is still no fuel.
6. Tested the injectors for power and there is.
7. Tested the plug on the bottom of the car and there was 5v to 2 pins. Will check for 12v tomorrow at pump.

What else could this be? Could it be the BCM? The key cylinder itself without flashing the security light? Is there another relay for the fuel besides the one in the fuse box under the hood?
Thank you all and I hope that someone can help soon!
Travis