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Where is the fuel pump relay switch on a 2004 chevy impala

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6ya6ya
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Posted on Jan 02, 2017

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cshubart
  • 146 Answers

SOURCE: need relay location for electric fuel pump on 1991

under the hood or dash

Posted on Sep 26, 2009

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emissionwiz
  • 76848 Answers

SOURCE: 96 chevy truck, fuel pump relay switch (located under the hood, driver's side wheel well) keeps shorting out and melting fuse panel

I would replace the fuel pump and the fuel pump connector, both have problems in this year that cause excessive current draw and blow the fuse and overheat the system. If the relay socket terminals are discolored from heat that must be replaced as well. Of course before replacing any parts have a GM dealer confirm the problems i have guessed are to the cause.

Posted on Jul 09, 2012

nicole99wu
  • 1049 Answers

SOURCE: how do i access the headlamp relay switch 2004 chevy impala

The switches used in the headlight relay operate via one circuit to control the parking lights, another current for driving lights and the third operates the high beams. One or multiple switches in the set can fail due to corrosion, excess current or exposure to damp conditions, resulting in total loss of headlight function or the inability to switch between beam brightness. The operator should inspect the switches for signs of damage or wear and replace them as needed.

Read more: Chinasinoy Electron

Posted on Aug 03, 2012

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There is not a fuel cut off switch for a 2004 Trailblazer. Have your fuel pump relay checked, if it is good I would look at having your pump tested.

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I just replace my fuel pump on a 2004 Chevrolet impala and it sill won't start. Can you tell me exactly where I can find the fuel pump reset switch?


There is no fuel pump reset switch ! You need to test the electrical circuit , there is a fuel pump RELAY that turns on the fuel pump an this is where you test for battery voltage an control of the relay ! THE PCM - ( engine computer ) provides a ground to pin 85 there by energizing the relay turning on the fuel pump ! Here check out this video . GM Fuel Pump Relay Testing

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1 Answer

I have a 2004 Chevy Impala it has poer at the fuel pump fuse and fuse looks good but no power at fuel pump. is there a fuel pump relay switch or what could it be?


First make a set of jumper wires and jump the pump from the battery and see if it works. If it runs its the relay or the ECU,or the ignition switch.
Remove the relay and test it for B+. Then jump the terminals and see if the pump runs. If pump runs and you got B+ up to this point its the relay.
However,if no B+ at the relay means ECU not giving relay the turn on signal..
While wearing a ground wrist strap check out ECU Grounds and B+ wires for continuity from Ignition switch and other areas of interest (use shop manual)
either the switch is not telling ecu to send message to relay to turn on the pump or someone in this circuit has gone bad.

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01 chevy impala. power mirrors and gas gauge not working


Check all fuses and relays. As far as the gas gauge, you may need a new fuel pump, fuel pump relay, or the float on the fuel pump is loose or came off from ear and tear.The mirrors: check the fuses; also, check, or have the button panel in the door checked to ensure the connection are secure. May need a new switch for the mirrors. I am not familiar with this vehicle; but this is what I suggest doing to solve the issues.

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check all the ground cables and wires.make sure that the ground cable going to the engine is clean and tight.

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