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Chevy Silverado and GMC Sierra Fuel Pump/Fuel System

333 messages,  Last post on Dec 03, 2009 at 12:13 PM

You are in the Chevrolet Silverado & GMC Sierra Forum. Your Host is kcram

What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Truck


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#32 of 333
Re: 2001 GMC 1500 sierra initial start problems [seannoo] by 99transportonr
Dec 12, 2006 (7:03 pm)
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Replying to: seannoo (Nov 05, 2006 12:41 pm)

FUEL FILTERS.... FUEL FILTERS... FUEL FILTERS
 
 Changing your fuel filters regularly will save your fuel pump.
#33 of 333
Fuel by liftedsierra00
Jan 08, 2007 (9:29 pm)
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Is that what that is when My truck wont start? the engine cranks for a few seconds I wait and moment and the it fires up.? Also when I fill up my fuel needle goes wack. I know my tanks full but the needle shoots to empty and goes up slowly and back to empty. *SHRUGS* any ideas?
#34 of 333
Re: Fuel [liftedsierra00] by seannoo
Jan 09, 2007 (10:29 am)
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Replying to: liftedsierra00 (Jan 08, 2007 9:29 pm)

I have been lagging on getting my truck fixed of this problem. Although I am not having the same issues as the other guys (using excessive fuel, etc.) since the fuel pressure regulator fixed their problem, I am going to change mine out too to see if that corrects it. I was at Pep Boys and they wanted a little over $90 for the regulator, so I am going to get it from Auto Zone where one of the guys said it was only $45. I will put it on my to do list for this weekend (for sure this time) and let you know if that fixes things.
It sounds like you and I have the same issue, in that it won't start the first time unless you crank it for a long time, but once it is running, it is fine.
#35 of 333
1990 GMC 1 ton....... by litalow79
Jan 09, 2007 (8:40 pm)
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My fuel pump stays ON after the truck has been shut off... often runs the battery down if I dont disconnect it at night. has new fuel pump in the tank and a new switch thing,(like a timer switch)... we have checked out many electrical scenarios, just cant figure this one out! Please help! thank you
#36 of 333
Re: 1990 GMC 1 ton....... [litalow79] by seannoo
Jan 10, 2007 (7:13 am)
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Replying to: litalow79 (Jan 09, 2007 8:40 pm)

It sounds like you have an electrical short somewhere. The fuel pump should only run when the ignition is on and the fact that yours is running when the ignition is off is very strange. Does anything else stay on that should not be when the ignition is turned off? Did the problem start around the same time that you had something added to the electrical system? It could also be a bad fuel pump relay in your electrical panel under the hood. The contacts on it could be internally shorting out and causing it to stay on.
#37 of 333
Re: 1990 GMC 1 ton....... [seannoo] by litalow79
Jan 10, 2007 (4:44 pm)
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Replying to: seannoo (Jan 10, 2007 7:13 am)

Hello Sean,
do you think that a truck like mine would have a timer on the fuel pump that stays on for 20 seconds after the truck is shut off? thats what my mechanic changed out last time he worked on it... I really have never heard of such a thing, but also, do you think that this timer and the relay might be the same thing? I hate my truck... but we just put a new motor in it, it didnt have this problem before, just the gas guage didnt work, this fuel pump thing started after we got the gas guage fixed.
#38 of 333
Re: 1990 GMC 1 ton....... [litalow79] by seannoo
Jan 11, 2007 (6:57 am)
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Replying to: litalow79 (Jan 10, 2007 4:44 pm)

litalow; I don't know what would be the purpose of a timer that would keep the fuel pump on after you turn off the ignition; it just doesn't make sense to me. when they fixed the gas guage, did they replace the sending unit or have to drop the tank for the repair? If so, your problem probably lies in the back of the truck in the area of the tank; at least that would be my guess.
#39 of 333
Re: 1990 GMC 1 ton....... [seannoo] by litalow79
Jan 15, 2007 (9:38 pm)
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Replying to: seannoo (Jan 11, 2007 6:57 am)

Hi Sean,
It sure was nice of you to help me with my truck dilemma... The truck went back into the shop again last week, and I hope that we will finally get all the bugs worked out eventually. believe it or not your comments really helped me to persuade my mechanic to look at that relay one more time... they told me that the relay was the first thing they changed out, but after I had them check it again they said that when they pulled it out, that it had rattling parts inside it and they were able to get another replacement one at no charge to me. I havent gotten it back yet because the other thing they needed to change out was a bad pilot bearing, (clutch)..... it was ready today but they didn't have time to test drive it yet so I should have it in the afternoon sometime tomarrow. thank you so much for your help, and good luck to you with your projects always! R.R.
#40 of 333
Fuel filter location, 04 3500 drw by 81ringer
Jan 21, 2007 (6:36 pm)
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#41 of 333
Fuel filter location, 04 3500 drw by 81ringer
Jan 21, 2007 (6:36 pm)
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Does anyone have a location for the fuel filter on a 04 3500 DRW crew cab, with 8.1L and allison tranny? I traced the lines back to the tank, and the only place i think it could be is either the tank or a box mounted on the underside of the bed. 1 line runs to it.

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