Contents Section: Diagnosis - Torque Converter Clutch All sections

Electrical Problems GMC Pickup R2500

Electrical Problems

  1. Voltage not reaching transmission. Ensure 12 volts reach transmission to engage solenoid.
  2. Ground inside transmission. Ensure solenoid is not grounded inside case.
  3. Defective connector, wiring harness, or solenoid. Check and repair or replace as required. Defective pressure switch (if equipped). Check and replace pressure switch as required.
  4. 3rd and/or 4th gear switch inoperative. Check and replace switch(es) as required.