Buick Repair Questions? Ask a Mechanic for Answers ASAP
Hi, I'm Ron and I will be helping you today.Stand by for a moment while I prepare your answer.
Now you need to find the wiring break either in the harness or a bad connection somewhere in between there.
I have also seen rodents chew through the wiring harnesses quite often too. Not sure why, must be tasty for them, so check that first. Let me know if you need anything else.
Okay, try this re-learn procedure just in case something weird happened in the system.
A scan tool would be my next suggestion to do some bidirectional tests on the pump.
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I'm not looking for codes, I'm looking for a loss of communication though the modules. This is right where this is leading.