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4WD issue

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by SeaSalty, Jun 25, 2013.

  1. j cat

    j cat Active Member 1000 Posts


    I believe the 30A TREC fuse is the same as the ATC 20A fuse which is in the older vehicles like my 2000 .
    if the 8 volt dc feedback voltage wire is shorted out you will get no switch lights. the voltage regulator 8 volts dc is in the 4wd control module which you replaced. check at this module for the 8 volts and the ground. both must be good or what you have is what you.ll get. the encoder will not move unless it has the knowledge of what position the encoder is. no 8 volts will do this .

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