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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Engine Mechanical - 5.3L (L83) Or 6.2L (L86) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> Camshaft Position Actuator And Solenoid Valve Diagnosis And Testing

Camshaft Position Actuator And Solenoid Valve Diagnosis And Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Measure the engine oil level. Fill, as required.
  2. Using the scan tool, inspect for diagnostic codes within the engine control module (ECM). Refer to Diagnostic System Check - Vehicle . Repair, as required.
  3. Verify proper engine oil pressure and operation of the active fuel management oil pressure relief valve. Refer to Oil Pressure Diagnosis and Testing .
  4. Inspect the CMP actuator solenoid valve for proper operation. Refer to Camshaft Position Actuator Solenoid Valve Inspection .
    • If valve inspection confirms proper movement of the spool, replace the CMP actuator and CMP valve.
    • If valve inspection confirms improper movement of the spool, replace only the CMP valve.
  5. Verify proper operation of the CMP actuator control system. Refer to Diagnostic System Check - Vehicle .
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