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Discussion Starter · #1 ·
Wife and kids were on their way home, got about 3miles from home. She says she lost power steering and noticed the gas wasnt working either coasted to a sidestreet and waited for me to get there. Had it towed home and i cant get it to start, it will crank over and want to start. Im thinking its a fuel issue but where to start is the question. Ive been searching and reading for the last 2 days.

I threw my scanner on it and there are no codes So where do I start? Ive downloaded the factory service manual so i have it handy. I cant hear the pump running when i turn the key on.

Prior to this happening, if it sat a couple couple days with out going anywhere it took longer to start.

Im thinking its either the tank pump or the high pressure pump. Is there any situation where either one of these fail but wont register and code?

Thanks in advance.
 

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If you are not hearing the fuel pump, I would start with the fuel pump relay and fuse. If those are good than it is most likely the fuel pump has failed....................or your out of gas. :)
 

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Discussion Starter · #3 ·
If you are not hearing the fuel pump, I would start with the fuel pump relay and fuse. If those are good than it is most likely the fuel pump has failed....................or your out of gas. :)

I could not find a fues or relay in the box under the hood or glove box. Is it labeled as something other than fuel pump?


Definitely not out of gas has about 1/2 tank in ATM.
 

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Discussion Starter · #5 ·
I think the fuse is labelled FPCM for fuel pump control module.
I found it just fuse was fine but replaced with another just to try and still didn't work.

Going to start dropping the tank and replace the fuel pump.

May go to the junk yard and get a fuel control module just to help trouble shoot.

If the high pressure pump went bad but the low pressure was good wouldnt it still spit and sputter? Or would it not run like it is now?
 

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Theres a plug under the vehicle. Drivers side, literally under the area of the drivers seat. This plug can get yanked or for some reason comes loose and causes fuel issues.
 

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Heres the bulletin and pic

 

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Discussion Starter · #9 ·
Update*

I went to the junk yard on Sunday and grabbed a FSCM and a high pressure pump. I did not get the fuel pump in tank, I will order new if needed.

I swapped out the Control Modual and tried to start it. No luck.... still no code. I will check that plug under the driver seat area, but also plan on doing the high pressure pump at this point.

Is there a write up on chaging that pump. I recall the cam lobe needs to be in a certain position.

Thanks for all the help so far.
 

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Is there a write up on chaging that pump. I recall the cam lobe needs to be in a certain position.
A few videos like this exist:
 

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Discussion Starter · #11 ·
Well, last night I changed the high pressure fuel pump. Thanks for the video it saved a bunch of time. Unfortunately it did not help. I also checked the plug under the drivers seat, it wasn't loose at all. I did unplug and replug and still no luck. Im gonna start dropping the tank tonight and hopefully a new pump will be the key. Im still not seeing any codes or CEL coming on.
 

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You dont say, but since you put in a used hpfp, you may have reused all the parts.
GM says not to reuse some of those parts as they could leak gas in the engine compartment. When new, the connecting ends deform to make a proper seal.
 

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Certainly seems like a pump issue - especially if you can’t hear it priming and you’re fairly sure it’s getting power, but what about a broken (or jumped) Timing Chain? Can that be ruled out?
 
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