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Home >> GMC >> 2000 >> Jimmy 2D Utility, 4WD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Tests >> Miscellaneous Controls >> Transmission >> Torque Converter Lock-Up Signal From PCM
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Torque Converter Lock-Up Signal From PCM

  1. Warm engine to operating temperature. Raise vehicle and support drive wheels. Support suspension where necessary to prevent damage to drive axles.
  2. Connect a test light to battery voltage. Touch TCC control driver terminal with test light. Accelerate vehicle to 45 MPH and note test light. If test light does not illuminate, problem is a faulty PCM connector or PCM.
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