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Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Chevy
Satisfied Customers: 3969
Experience:  Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles A6 - Electrical / Electronic systems A7 Heating / Air Conditioning systems
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08 Avalanche has Code P0230 & P069e, the dealership has so

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08 Avalanche has Code P0230 & P069e, the dealership has so far replaced the fuse block, the FSCM Module & the PCM, still have Engine light on with the above codes. I did notice today that the fuel pump continually runs with the key on but not running, shouldn't the fuel pump kick off after a few seconds of priming?
JA: Most vehicles have two fuse panels. Have you located both?
Customer: yes
JA: Are you fixing your Avalanche yourself? What have you tried so far?
Customer: I might as well, the dealer has replaced the fuse block, the FSCM and the PCM and its still throwing codes
JA: Anything else you want the mechanic to know before I connect you?
Customer: I put a new ground wire from engine to body and the engine light went off but returned a few days later with the same codes.

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

Hey how are you

You are correct on the fuel pump running for few seconds only , and what keeps off and then back on is the FPCM (Fuel pump control module ) ( i believe that is what you meant by FSCM)

This is usual the FPCM , but click on link to view pdf file and troubleshoot steps for these faults , since it could be few other things and testing is needed

It seems you have a ground problem keep it on but let test

click on link and tell me if you can view that circuit

i want you to look at the fuel pump relay that activate the fuel pump ,where it has ground point G300 and 3 more pins one from ecm/pcm, one from switch and one to fuel pump

so at that relay with test light can do you know how to test on what is keep it on ,switch side , ecm side or ground

G300 location: (Under Vehicle driver door at on BODY MOUNT )

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

You are very welcome :)

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Chad Farhat
ASE Certified Technician

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