2009 Chevrolet Tahoe Logo
Ronald Lacinski
Ronald Lacinski Posted on Apr 22, 2015
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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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Denis Devoy

Denis Devoy

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  • Chevrolet Expert 217 Answers
  • Posted on Apr 22, 2015
Denis Devoy
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Change your fuel pump relay

Jeff Armer

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  • Posted on Apr 22, 2015
Jeff Armer
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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.

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