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Vapor lock? On a 4.3. 2000. Chevy. Blazer - Cars & Trucks

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Not really possible.
Vapor lock was when liquid fuel would vaporize in the steel line or carburetor from excessive heat.
Since your Blazer is fuel injected, the fuel can not vaporize in the line.

Posted on May 11, 2013

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Posted on Jan 02, 2017

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Removal & Installation
To Remove:


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  2. Drain the fuel tank through the filler pipe.
  3. Support the fuel tank.
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View of the in-tank fuel pump assembly.
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I need to remove the fuel pump from my 99 chevy blazer , is there an access panel or does the fuel tank have to dropped?


  1. Properly relieve the fuel system pressure.
  2. Drain the fuel tank.
  3. Support the fuel tank.
    1. Remove or disconnect the following:
    2. Negative battery cable
    • Filler neck from the tank
    • Shield from tank and tank straps
    • Fuel lines and vapor hose from pump
    • Electrical connection from fuel pump
    • Fuel tank
    • Fuel pump/sending unit assembly by turning the locking ring (located on top of the fuel tank) counterclockwise using a spanner wrench
    • Fuel pump from the fuel lever sending device
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    NOTE The fuel pump strainer must be in a horizontal position when the fuel sender is installed in the tank. When installing the sender assembly, make sure that the fuel pump strainer does not block full travel of the float arm.


    • Tank and connect fuel lines and vapor hose
    • Tank to the frame. Torque the fasteners to 33 ft. lbs. (45 Nm).
    • Shield
    • Fuel filler neck and clamp
    • Negative battery cable
    1. Refill the tank.
    2. Run the engine and check for leaks.
    6207c87.gif
    View of the in-tank fuel pump assembly

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