Question about 2003 GMC Envoy
I can't get no power to the foul pump I change fuse, relay, and ECM still no power but if I run a power to the pump it comes on.
Check to see if you have a fuel pressure sensor in the fuel manifold . It is there to stop the pump working when the pressure in the manifold is held constant . IT sends to the ECM which in turn activates the pump relay and turns the pump on.
Posted on Mar 18, 2014
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Posted on Jan 02, 2017
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