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    1996 GMC Truck Jimmy 4WD 4.3L SFI 6cyl

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    EGR Valve

    EGR Valve Operation:

    The EGR (exhaust gas recirculation) valve recirculates exhaust gases through the intake manifold to be burned again, cooling peak combustion temperature. Dilutes the air and fuel mixture to keep the nitrogen oxide emissions within breathable limits.

    How To Instructions:

    Inspect - Check for obvious problems.
    Test - Give it an in-depth diagnosis.
    Replace - Out with the old, in with the new.

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