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Discussion Starter #1
I have a 2001 Chevy Silverado just replaced the fuel pump and is not running acts like no power to the pump? Any help would be great!
 

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Did you change the fuel filter when you changed the fuel pump??
 

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Was this a problem before you changed the fuel pump?
 

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Discussion Starter #5
replaced pump three months ago ran fine, went to start truck the other day and no pump, Thought the pump was bad replaced with another new one still nothing pump not running
 

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If I suspected the fuel pump wasn't getting power, the first thing I'd do would be to grab a wiring diagram and my voltmeter and see if I could locate where the break in the fuel pump circuit was. I'm not exactly sure where all the connectors are on your '01, but I'd probably start at the relay (should be under the hood) and make sure the relay is closing. If your '01 is like my '98, you have to drop the tank/lift the bed to get at the connector at the pump, so it is kind of a pain to check voltage at the pump.
 

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The pumps on these are electric and make enough noise to hear them run. I usually assume when someone says their fuel pump isn't running, they mean that they can't hear the pump run.
 

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hate to say this but been around alot of silverados.4.8 5.3 these pumps do not make very much noise.You would have a hard time hearing it buzz when you turn the key on.he also said he replaced it 3 mo.ago.didnt start so he went a bought another one.thats about 5 or 6 hundred dollars in 3 months.hope the 1st one was covered.Not to beat this to death but.truck wont start change fuel pump truck still wont startIf there is power at the pump check the fuel pressure regulator.Pull the vacuum line off if it is wet it is bad.My2c

---------- Post added at 02:24 PM ---------- Previous post was at 02:23 PM ----------

how did you check the power at the pump?
 

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sounds like fuse or relay to me.. You really can't hear the pump run on mine.. when I first got the truck, the pump was going out, it whined REAL loud.. was horrible.. I replaced it, and it now is so quiet you can't hear it.. Got it from 1aauto.com for $98, so if you need one, it's cheap enough to buy a couple.. have a spare.. Anyway, make sure the relay is clicking, by having your buddy or wife/girlfriend, random homless guy, turn the key on while you are under the hood, fuse/relay box open, listening to the fuel pump relay. small grey lower center of box. Wouldn't hurt to swap it with another relay to see if it fires up. they are cheap. check the fuse too, make sure it's good.
 

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sounds like fuse or relay to me.. You really can't hear the pump run on mine.. when I first got the truck, the pump was going out, it whined REAL loud.. was horrible.. I replaced it, and it now is so quiet you can't hear it.. Got it from 1aauto.com for $98, so if you need one, it's cheap enough to buy a couple.. have a spare.. Anyway, make sure the relay is clicking, by having your buddy or wife/girlfriend, random homless guy, turn the key on while you are under the hood, fuse/relay box open, listening to the fuel pump relay. small grey lower center of box. Wouldn't hurt to swap it with another relay to see if it fires up. they are cheap. check the fuse too, make sure it's good.
X2....well except the homeless guy....
 

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fuel pump

The entire assembly. Pump included. Here is the link to the part I got.. Great price compared to $231, which is the cheapest I found locally..
 

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Discussion Starter #15
cut factory pluf off to replace with new conector, tested gray and black which are for the pump hooked up test light had friend turn key no light. there is power to the fuel level guage just not the pump motor side
 

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tested gray and black which are for the pump hooked up test light had friend turn key no light.
If yours is wired like mine, I think the next good access point is the relay. Look at the relay to verify that the relay is closing.
 

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Discussion Starter #17
Well Still not haveing any luck, no power to the pump new rely and fuse is good does anyone have any more thoughs on this problem
 

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Wiring diagram if relay and fuse checks out and no power to pump you have lost the circuit somewhere; either a broken wire, loose connector, or a corroded connection.
 

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Looks like now you have to follow the wiring from the pump towards the fuse box and find the broken connection. You should identify which wire is faulty. The power wire or the ground. Check your power wire to the chassis, check for 12v. You could also check continuity from your ground wire to chassisthis will help you identify which wire is giving you the problem. 9 times out of 10 its just a bad ground.
 

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Discussion Starter #20
chevy silverado 1500 4x4 5.3l fuel problem

Okay here's an update we have power from relay but no power to relayto tell the relay to close and power pump was wondering what could cause this problem? could it be the ignition switch?
 
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