Question about 2009 Chevrolet Tahoe

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2009 chevy tahoe fuel pump wont shut off

I changed fuel pump driver and still have same problem

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Change your fuel pump relay

Posted on Apr 22, 2015

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The fuel pump control module is controlled by the ECM - engine control module , Possibility of DTC'S stored ! You need to take to Chevy Dealer !
The engine control module (ECM) supplies voltage to the fuel pump control module (FPCM) when the ECM detects that the ignition is ON. The voltage from the ECM to the FPCM remains active for 2 seconds, unless the engine is in Crank or Run. While this voltage is being received, the FPCM closes the ground switch of the fuel pump and also supplies a varying voltage to the fuel tank pump module in order to maintain the desired fuel rail pressure.

Posted on Apr 22, 2015

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