Circuit/System Verification

2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Circuit/System Verification
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    IMPORTANT: The supply of clean pressurized engine oil to the CMP actuator is essential to CMP actuator performance.
  1. Allow the engine to reach operating temperature.
  2. Set the parking brake and place the vehicle in Park for automatic, or Neutral for manual.
  3. Observe the CMP variance parameter. The CMP variance will rise for 1-2 seconds until the CMP Angle parameter matches the Desired CMP parameter. The CMP variance should again return to 0 degrees.
  4. IMPORTANT: The engine will run rough and may require throttle input to keep running.
  5. Command the CMP actuator to 20 degrees. The Desired CMP parameter should match the CMP Angle parameter.
  6. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observed from the Freeze Frame/Failure Records data.
RENDER: 1.0x

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When to See a Mechanic

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

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