Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello and welcome!My name isCustomerand I can assist you with your question.
Does the check engine light come on with the key on?
Can I start by getting your VIN?
Thank you for the VIN!
IT looks like the vehicle control module powers up and or activates the fuel pump relay. I would be willing to bet if you checked into this, the computer is not awake with the key on. This explaines why the fuel pump relay is not getting activated and the check engine light does not come on with the key on.
Have you checked for codes in the computer?
Are you sure the fuse is good? It might be possible that the fuel pump is pulling too many amps which can blow the fuse.
At the relay, remove it and check for two powers and one ground while cranking. You would check this with the relay removed and checking the female pins (where the relay plugs into). There should be two powers and one ground going into the relay. Here is a wiring diagram.
My diagram does not tell me which pin is 30 and which is 85.
I will need to know if there is constant power to the relay or if you only get the "key on" power
Oh, excellent! So if the fuel pump relay is clicking when the key is turned on and while cranking, then this means the fuel pump relay is getting all of the correct inputs. So then your next step is to check for power at the fuel pump itself on the gray wire. If there is power and the fuel pump has a good ground but still not coming on, the fuel pump is bad and will need to be replaced.
However, if there is no power to the fuel pump on the gray wire, then there is an open in the wire from the relay to the fuel pump. You could trace the wiring and find and fix the issue or simply run a new wire and you will be good to go!
YES, thats correct.. provided the wiring is in good shape. However, that is not very common as the fuel pump itself goes bad all of the time.
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Because it is simply starting to go bad. :)
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