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HOMESERVICE MANUALSCHEVROLET2018SILVERADO 2500 HD WT, 2D PICKUP, 6.0L ENG VIN G, RWD, GASREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTACCESSORIES CONTROL SYSTEMSPOWER TAKE-OFFDIAGNOSTIC INFORMATION AND PROCEDURESDTC P260A-P260C: POWER TAKE-OFF (PTO) RELAY CONTROL CIRCUITCIRCUIT/SYSTEM TESTING
2018 Chevrolet Silverado 2500 HD WT, 2D Pickup, 6.0L Eng VIN G, RWD, Gas

Circuit/System Testing

2018 Chevrolet Silverado 2500 HD WT, 2D Pickup, 6.0L Eng VIN G, RWD, GasSECTION Circuit/System Testing
NOTE:

This diagnostic procedure will only diagnose factory installed components. It will not diagnose upfitter provided equipment.

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connectors at the K44 Power Take-Off Control Module. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 1 V between the relay coil control and the relay engage signal circuit terminals listed below and ground:
    • K44 Power Take-Off Control Module signal circuit connector X2 terminal 37
    • K44 Power Take-Off Control Module low reference connector X2 terminal 11
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  3. Test for infinite resistance between the relay coil control and the relay engage signal circuit terminals listed below and ground:
    • K44 Power Take-Off Control Module signal circuit connector X2 terminal 37
    • K44 Power Take-Off Control Module low reference connector X2 terminal 11
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • Go to next step: If less than 2 Ω 
  4. Test for less than 2 Ω end to end in the signal and low reference circuits listed below:
    • K44 Power Take-Off Control Module connector X2 terminal 37 and the frame rail X191 Provisional Connector terminal B
    • K44 Power Take-Off Control Module connector X2 terminal 11 and the frame rail X191 Provisional Connector terminal H
    • If 2 Ω or greater 

      Repair the open/high resistance in the circuit.

    • Go to next step: If less than 2 Ω 
  5. Test or replace the K44 Power Take-Off Control Module.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.