Question about 1995 Chevrolet Blazer

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Having problems changing the fuel pump cant get the tank to drop support braces are off and fuel line hoses to the pump any ideas

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  • David Katrenick
    David Katrenick May 11, 2010

    did you take all of the bolts off around the fuel port? Sometimes you have to take the whle fuel dorr off to get to them. The tank wont drop with the fill pipe still attached to the truck.

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And you removed the filler neck hose? If you have the braces off it should come down. Can you look above the tank at all or it won't come down far enough to see above?

Posted on Jul 28, 2009

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Need too drop fuel tank too change fuel pump


The basic rule is to disconnect the filler hose and fuel-electrical lines then take the straps off that hold the tank.
The exhaust may need to be moved or removed.
Make sure the tank is as empty as possible before you start.

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How do i drop the fuel tank to replace my fuel pump on my 2006 chevy trailblazer LS. There are 3 lines that I don't know what they are used for after you drop the tank 4 or 5 inches.


their are two fuel line at the front of the tank one is the fuel feed and the other is the return line! Now the ones at the back of the tank are for emission you don't want to break or damage those make sure you disconnect all of those line and the is a red connector also at the rear of the top of the tank make sure you disconnect that. And just make sure careful when remove fuel pump it has a tight fit coming out also when your done make sure all your hoses and lines are reconnected and the red ont too! GOOD LUCK !

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Easiest way to replace a fuel pump on a 2002 chevy avalanche?


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Mar 04, 2011 | 2002 Chevrolet Avalanche

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How to Change a Fuel Pump on an 2005 Envoy XLT? Must drop the tank? Does it have access under the rear seat?


Usually there is no access under the rear seat for safety reasons.prev.gif next.gif Fuel Tank Removal & Installation 2002-2004 To Remove:
  1. Relieve the pressure in the fuel system.
  2. Lift the vehicle.
  3. Remove the frame brace from the frame.
  4. Remove the fuel tank shield from the fuel tank.
  5. Drain the fuel from the tank into an approved container.
  6. Loosen the fuel hose clamp and disconnect the hose from the fuel tank.
  7. Disconnect the evaporative emission (EVAP) vent valve and fuel tank pressure sensor connectors. Evaporative emission cansister pipes removal and installation gm-05-00-1546.gif

  8. Disconnect the evaporative emission (EVAP) vapor and vent valve pipes from the evaporative emission (EVAP) canister.
  9. Disconnect the fuel return and feed pipes from the fuel tank.
  10. To avoid system contamination, cap the evaporative emission (EVAP) and fuel pipes.
  11. Use a jack to support the fuel tank. Fuel tank removal and installation gm-05-00-1547.gif

  12. Detach the fuel tank straps from the frame.
  13. Lower the fuel tank.
  14. Disconnect the fuel sender connector.
  15. Remove the fuel tank from the vehicle.
To Install:
  1. Place the fuel tank under the vehicle.
  2. Connect the fuel sender connector.
  3. Attach the fuel tank straps to the frame. Torque the bolts to 24 ft-lb (32 Nm).
  4. Remove the caps from the evaporative emission (EVAP) and fuel pipes.
  5. Connect the evaporative emission (EVAP) vapor and vent valve pipes to the evaporative emission (EVAP) canister.
  6. Connect the evaporative emission (EVAP) vent valve and fuel tank pressure sensor connectors.
  7. Connect the fuel hose to the fuel tank. Torque the clamp to 22 in-lb (2.5 Nm).
  8. Connect the fuel return and feed pipes to the fuel tank.
  9. Lower the vehicle.
  10. Refill the fuel tank.
  11. Turn on the ignition for 2 seconds, with the engine off, and then turn off the ignition. After 10 seconds, turn the ignition back on with the engine off.
  12. Lift the vehicle.
  13. Check for leaks in the fuel lines.
  14. Install the fuel tank shield onto the fuel tank.
  15. Install the frame brace onto the frame.
  16. Lower the vehicle.
2005-2007 To Remove:
  1. Relieve the pressure in the fuel system.
  2. Lift the vehicle.
  3. Remove the frame brace from the frame.
  4. Remove the fuel tank shield from the fuel tank.
  5. Drain the fuel from the tank into an approved container. Evaporative emission cansister pipes removal and installation gm-05-00-1544.gif

  6. Disconnect the evaporative emission (EVAP) canister fresh air, solenoid, and purge pipes from the evaporative emission (EVAP) canister.
  7. Disconnect the fuel filler pipe recirculation hose from the fuel tank.
  8. Loosen the fuel fill pipe clamp and disconnect the pipe from the fuel tank.
  9. Disconnect the fuel feed and evaporative emission (EVAP) pipes from the fuel tank.
  10. To avoid system contamination, cap the pipes.
  11. Use a jack to support the fuel tank. Fuel tank removal and installation gm-05-00-1545.gif

  12. Detach the fuel tank straps from the frame.
  13. Lower the fuel tank.
  14. Disconnect the evaporative emission (EVAP) vent valve, fuel tank pressure sensor, and fuel sender connectors.
  15. Remove the fuel tank from the vehicle.
To Install:
  1. Place the fuel tank under the vehicle.
  2. Connect the evaporative emission (EVAP) vent valve, fuel tank pressure sensor, and fuel sender connectors.
  3. Lift the fuel tank.
  4. Attach the fuel tank straps to the frame. Torque the screws to 24 ft-lb (32 Nm).
  5. Remove the caps from the pipes.
  6. Connect the fuel feed and evaporative emission (EVAP) pipes to the fuel tank.
  7. Connect the fuel fill pipe to the fuel tank. Torque the clamp to 22 in-lb (2.5 Nm).
  8. Connect the fuel filler pipe recirculation hose to the fuel tank.
  9. Connect the evaporative emission (EVAP) canister fresh air, solenoid, and purge pipes to the evaporative emission (EVAP) canister.
  10. Lower the vehicle.
  11. Refill the fuel tank.
  12. Turn on the ignition for 2 seconds, with the engine off, and then turn off the ignition. After 10 seconds, turn the ignition back on with the engine off.
  13. Lift the vehicle.
  14. Check for leaks in the fuel lines.
  15. Install the fuel tank shield onto the fuel tank.
  16. Install the frame brace onto the frame.
  17. Lower the vehicle.

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1 Answer

Need any tips i can get on changing my fuel pump


Using a floor jack brace the gas tank while you remove the straps. With the tank braced in place remove the small screws holding the neck into the fuel door area. With someone helping slowly lower the tank while making sure the neck does not unbalance the tank. Once the tank is down remove all wires and fuel lines. Remove the retaining ring and there is your fuel pump. If possible remove and save as much gas as possible before beginning.

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Gas leaken new tank 94 4 runner think its fuel pump seal but dont wanna drop tank if dont have to found axcess pannel under rear passenger seat but dont see fuel pump to see if thats where its leaking from...


If the smell is coming from the back of the vehicle then it could be leaking from the return line or the filler hose. I would check the fuel filler hose first since you can probably get at it wihtout dropping the tank. You might be able to get to the return line as well which is a small hose that goes to the tank from the fuel pressure regulator to return unused fuel. If the smell is coming from the front of the vehicle I would inspect all of the fuel lines and the inline fuel filter if you have one installed and verify that none of the hose is damaged and all clamps are tight. Check your injector rail and make sure it is not leaking where it provided fuel to the injectos and check your injectors seat to see if there is any evidence of fuel leakage.

If you can't find any leaks in those locations then you are gonna have to drop the tank and check the pump.

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The pump is located in the fuel tank. Tank must be dropped to gain access & you do that by removing the staps & carefully lowering the tank. On top of the tank, the retaining ring has to be removed, hoses disconnected carefully, and the entire fuel pump assembly with the float & low fuel warning sensor (if equipped) will be removed .

Important to note the position of the hoses, wiring, and the mounting position of the pump and the retaining ring as it fits into the tank. Mark items to identify where to return them to once done. Pictures with a digital camera are good to have when needing to review how things were.

Not a bad idea to replace the in-line fuel filter when replacing the fuel pump assembly, fill it as full as possible with fuel injector cleaner before reinstalling the hoses & you'll get a good injector cleaning as well.


good luck

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sounds like you are going to have to drop the tank out to inspect and fix. with luck it will be leaking from the fuel pump seal or the return line.
Bad luck would be if the tank is rusted out and needs to be replaced.
Syphon as much gas out of the tank as you can before you drop it , gas is heavy.

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