2008 Chevrolet Silverado 1500 - ECM?

when turn key to on position fuel pump pressures up to 58 psi and immediately drops drops to 0 psi found that all injectors on one side of engine are activated open all new injectors installed. please help is it a bad ecm?

Unplug the injectors and see if the fuel pressure drops to zero again.

If it does, it’s not the ECM.

Tester

It held pressure i ordered a new ecm thank you very much and God bless you