Question about 2002 GMC Envoy

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I have 02 envoy, ihave changed the fuel pump i have tried relay but after I changed the pump I then discovered that there's no power getting to the fuel pump relay i have had this problem in the past

No power at fuel pump relay

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  • Contributor
  • 7 Answers

Is the car fitted with a fuel inertia switch ? Its a switch that cuts the fuel in thw case of an accident, like a hard impact or the car turning over ? Ive hit large potholes that have knocked the switch and the cut the vehicle of fuel completely! Disaster all together !

Next would be to see whether there is an immobiliser fault which would prevent the fuel system from working ?

Posted on Apr 16, 2019

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  • GMC Master
  • 526 Answers

The best way to fix the problem is getting help from service and repair manual with pictures and diagram which will give you step by step help to locate and fix the problem on your own and you will get the manual from the given link https://toolsnyou.com

Posted on Apr 16, 2019

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Posted on Jan 02, 2017

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SOURCE: 1996 CADILLAC DEVILLE, NO POWER TO FUEL PUMP

Check for a burned fusible link under the hood. If you have power at the fuel pump relay, you could have a bad ignition switch or bad oil pressure switch...accordianman

Posted on Dec 15, 2008

  • 1 Answer

SOURCE: no power to fuel pump relay

check the realy under the shifter knob..see if all 4 plugs are plugged in.. if not check you EFI fuse(its near the the battery fuse box)..if the fuse is fine then it might be ur ecu

Posted on Feb 09, 2009

  • 5692 Answers

SOURCE: my fuel pump is not getting power, I've changed

The fuel relay and inertia switch could be two different items. The inertia switch kills power to the pump. If there is a relay in between the inertia switch and the pump, then it would mean the inertia switch was tripped by slamming a door or an impact. Check your owners manual for the inertia switch. This website advertises online service manual reference.

Posted on Apr 26, 2009

goofduck
  • 490 Answers

SOURCE: No power at fuel pump.

have you checked the fuses??

Posted on Apr 27, 2009

alicantecoli
  • 22484 Answers

SOURCE: no power to fuel pump 02 ford taurus

or has the factory immobiliser cut in??does it have a spark if it doesnt then its dealer only

Posted on Sep 10, 2009

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Check the help links mentioned below to troubleshoot the isue:----

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--------

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http://repairhelpcenter.blogspot.com/2011/10/fuel-pump-relay-and-cooling-fan-relay.html

-------------

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----------------

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http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-fuel-pump.html

---------------

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-----------

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http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-fuel-tank.html
------------

HOW TO REPLACE A FUEL TANK CAP

http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-fuel-tank-cap.html

---------

HOW TO REPLACE A FUEL PUMP ASSEMBLY

http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-fuel-pump-assembly.html

--------------

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http://schematicsdiagram.blogspot.in/2012/07/jaguar-fuel-pump.html

---------------

Fuel leaks from fuel pulsation dampener on Toyota Corolla?

http://repairhelpcenter.blogspot.com/2012/01/fuel-leaks-from-fuel-pulsation-dampener.html

---------------

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http://repairhelpcenter.blogspot.com/2012/01/car-will-not-allow-to-put-fuel.html

----------

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http://technoanswers.blogspot.com/2012/01/adding-performance-chip-to-increase.html

--------------

How to test Electric fuel pump on GMC sonoma?

http://technoanswers.blogspot.com/2012/01/how-to-test-electric-fuel-pump-on-gmc.html

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http://technoanswers.blogspot.com/2012/01/fuel-gauge-drops-to-empty.html

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Fuel pump not working on 1991 Ford Ranger?

http://technoanswers.blogspot.in/2012/01/fuel-pump-not-working-on-1991-ford.html

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Fuel pump has no power on 2002 ford 350 7.3 diesel?

http://technoanswers.blogspot.in/2012/01/fuel-pump-has-no-power-on-2002-ford-350.html

------------

Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down?

http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html

-------

Ford Fuel pump Relay and fuse location diagram?

http://technoanswers.blogspot.in/2012/02/ford-fuel-pump-relay-and-fuse-location.html

------------

Ford inside fuse box diagram showing fuel pump relay?

http://technoanswers.blogspot.in/2012/02/ford-inside-fuse-box-diagram-showing.html

--------

Ford fuel pump fuse layout diagram?

http://technoanswers.blogspot.in/2012/02/ford-fuel-pump-fuse-layout-diagram.html

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How to lower fuel pressure on Toyota Hilux?

http://schematicsdiagram.blogspot.in/2012/02/how-to-lower-fuel-pressure-on-toyota.html

--------

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-----------

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http://schematicsdiagram.blogspot.in/2012/03/how-to-replace-fuel-filter-on-bmw-525i.html

---------

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http://schematicsdiagram.blogspot.in/2012/03/how-to-change-fuel-injector-on-2005-gmc.html

-----------------

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http://schematicsdiagram.blogspot.com/2011/12/time-to-replace-fuel-pump-on-1998-ford.html

-----------------

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---------------------


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------

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----------------

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--------------------------

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--------------------

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-----------------

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-----------------

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------------------

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------------------

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------------------

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http://schematicsdiagram.blogspot.in/2012/03/dodge-dakota-stallsstumbles-at-idlehas.html

-------------

Toyota Fuel line diagram

http://technoanswers.blogspot.com/2012/12/toyota-fuel-line-diagram.html


--------

These will help.

Thanks.

Dec 09, 2012 | Suzuki Cars & Trucks

1 Answer

Fuel pump


For fuel related problem, the help links are provided below.
Click the link below to go through its procedure: ----

How to relieve fuel pressure?
http://technoanswers.blogspot.com/2012/01/how-to-relieve-fuel-pressure.html
--------
Refueling problem?
http://repairhelpcenter.blogspot.com/2012/01/refueling-problem.html
--------
Car consuming more fuel?
http://repairhelpcenter.blogspot.com/2012/01/toyota-tercel-consuming-more-fuel.html
----------
How to maximize fuel economy on your vehicle?
http://schematicsdiagram.blogspot.com/2011/11/how-to-maximize-fuel-economy-on-your.html
-------
Fuel pump relay troubleshooting ?
http://repairhelpcenter.blogspot.com/2011/10/fuel-pump-relay-and-cooling-fan-relay.html
------------
How to Increase gas mileage vehicle?
http://schematicsdiagram.blogspot.com/2011/12/how-to-increase-gas-mileage-on-2011.html
---------
How to Test and Replace Fuel Injectors?
http://repairhelpcenter.blogspot.com/2011/11/how-to-test-and-replace-fuel-injectors.html
-------------------
How to replace Fuel Tank Assembly?
http://vwrepairhelp.blogspot.com/2011/11/how-to-replace-fuel-tank-assembly.html
--------------
FUEL LINES AND FITTINGS ?
http://repairhelpcenter.blogspot.com/2011/11/fuel-lines-and-fittings-on-acura-car.html
------------
Replacing Fuel Charging Assembly on Car?
http://vwrepairhelp.blogspot.com/2011/11/replacing-fuel-charging-assembly-on-car.html
------------
How to replace Fuel Pressure Regulator ?
http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-fuel-pressure-regulator.html
---------------
How to test Fuel Pressure and replace Fuel Pump?
http://repairhelpcenter.blogspot.com/2011/11/how-to-test-fuel-pressure-and-replace.html
--------------
Car will not take fuel into the fuel tank?
http://repairhelpcenter.blogspot.com/2012/01/car-will-not-take-fuel-into-fuel-tank.html
--------------
PGM-FI Main Relay location?
http://repairhelpcenter.blogspot.com/2011/11/pgm-fi-main-relay-on-acura-car-models.html
------------------
How to Relieve Fuel System Pressure on Car Models?
http://repairhelpcenter.blogspot.com/2011/11/how-to-relieve-fuel-system-pressure-on.html
-----------------
How to Replace a Fuel Injector
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-fuel-injector.html
----------------
How to Replace a Fuel Pressure Regulator?
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-fuel-pressure-regulator.html
-------------
How to Replace a Fuel Pump?
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-fuel-pump.html
-------------------
HOW TO CLEAN A FUEL SYSTEM
http://schematicsdiagram.blogspot.com/2011/07/how-to-clean-fuel-system.html
-----------
HOW TO REPLACE A FUEL TANK
http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-fuel-tank.html
--------------
HOW TO REPLACE A FUEL TANK CAP
http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-fuel-tank-cap.html
------------
HOW TO REPLACE A FUEL PUMP ASSEMBLY
http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-fuel-pump-assembly.html
-----------
How to change fuel injector on gmc ?
http://schematicsdiagram.blogspot.in/2012/03/how-to-change-fuel-injector-on-2005-gmc.html
------------
Time to replace Fuel pump?
http://schematicsdiagram.blogspot.com/2011/12/time-to-replace-fuel-pump-on-1998-ford.html
-----------
Emergency fuel shut switch location?
http://schematicsdiagram.blogspot.com/2011/12/emergency-fuel-shut-switch-on-ford-car.html
---------------
How to jump fuel pump?
http://schematicsdiagram.blogspot.com/2011/12/how-to-jump-fuel-pump-on-chevrolet.html
------------
Car wont start when cold?
http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-when-cold.html
--------
Car wont start after sitting overnight?
http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-after-sitting-overnight.html
---------
Car loses power while acceleration?
http://schematicsdiagram.blogspot.com/2011/12/car-loses-power-while-acceleration.html
------------
Fuel leaks from fuel pulsation dampener?
http://repairhelpcenter.blogspot.com/2012/01/fuel-leaks-from-fuel-pulsation-dampener.html
----------
Car will not allow to put fuel?
http://repairhelpcenter.blogspot.com/2012/01/car-will-not-allow-to-put-fuel.html
-----------
Adding performance chip to increase Fuel mileage MPG?
http://technoanswers.blogspot.com/2012/01/adding-performance-chip-to-increase.html
--------------
How to test Electric fuel pump?
http://technoanswers.blogspot.com/2012/01/how-to-test-electric-fuel-pump-on-gmc.html
---------
Fuel gauge drops to Empty?
http://technoanswers.blogspot.com/2012/01/fuel-gauge-drops-to-empty.html
-----------
Fuel pump not working on Ford?
http://technoanswers.blogspot.in/2012/01/fuel-pump-not-working-on-1991-ford.html
--------------
Fuel pump has no power on ford diesel?
http://technoanswers.blogspot.in/2012/01/fuel-pump-has-no-power-on-2002-ford-350.html
------------
Pushing on the gas pedal but the car slows down? Gas pedal to the floor and the car slows down?
http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html

---------
Ford Fuel pump Relay and fuse location diagram?
http://technoanswers.blogspot.in/2012/02/ford-fuel-pump-relay-and-fuse-location.html

--------
Ford inside fuse box diagram showing fuel pump relay?
http://technoanswers.blogspot.in/2012/02/ford-inside-fuse-box-diagram-showing.html
---------------
Ford fuel pump fuse layout diagram?
http://technoanswers.blogspot.in/2012/02/ford-fuel-pump-fuse-layout-diagram.html
--------------
How to lower fuel pressure on
Toyota?
http://schematicsdiagram.blogspot.in/2012/02/how-to-lower-fuel-pressure-on-toyota.html

------------
Fuel pump not running?
http://schematicsdiagram.blogspot.in/2012/02/fuel-pump-not-running.html
--------------
How to replace fuel filter on BMW?

http://schematicsdiagram.blogspot.in/2012/03/how-to-replace-fuel-filter-on-bmw-525i.html
----------

This will help.
Thanks.

Feb 26, 2012 | 1992 Toyota 4Runner

1 Answer

My 2002 envoy won't start, turns over fine. I have no power to the fuel pump, I have power at the fuse and relay. Has anyone heard of a camshaft or crankshaft sensor being faulty and turning off power...


You say you have power at the relay, but what part of the relay? If you don't have 12V at the gray wire going to the pump, then maybe the relay is bad. Also check to see what voltage you have on the dark green/white wire, this controls the relay (should be 12V).

Sep 07, 2011 | 2002 GMC Envoy

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