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  1. #1

    Default 99 Gmc Suburban K2500 7.4 , Electric cooling fan issues

    First off thanks in advance for any help I may receive, My problem is this I have a 1999 GMC suburban K2500 7.4L with front and rear A/C. The electric cooling fan is not working. I am not getting any power to the unit, I have verified that all fuses and relays ( by swapping with starter relay ) are working. I have supplied 12v directly to the fan and it works, I have also replaced the temperature sending unit by the thermostat housing. I feel I am a pretty good do it yourselfer, but my "brain is burning on this".

  2. #2

    Default

    little more info on what relay setup your using?
    and what Electric fans are they?
    -Jonathan
    2000 ECSB Silverado 2WD
    LQ4 with Isky 215 Turbo Cam
    4L80E KB Racing S475 Turbo Kit

  3. #3

    Default

    Jonathan, thanks for getting so quick. I am referring to the Factory relays in the engine compartment fuse and relay box and the fan is the cooling fan on the condenser in front of the radiator

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