Circuit/System Verification

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Ignition - On / Vehicle - In Service Mode
Verify DTC P0045, P0234, P0299, P0651, P16B0-P16B2, P169E, P169F, P16FA, P2564, P2565, P2598, P2599 is not set.
- If any of the DTCs are set
  Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If none of the DTCs are set
Engine - Idling
Perform the scan tool control function: Turbocharger Vane Position Actuator - Increase & Decrease
Verify the control rod of the actuator moves smoothly over the full range.
- If the control rod does not move smoothly over the full range
1. Ignition/Vehicle - Off
2. Verify the condition does not exist:
  - M103 Turbocharger Vane Position Actuator - Mechanically stuck control rod. / Visible Damage / Incorrect connection
  - Turbocharger - Debris / Restricted / Mechanically stuck/Mechanically damaged
  - If a condition exists
    Repair or replace as necessary. - Refer to: Compressor Air Intake Turbocharger Cleaning and Inspection
- Go to next step: If the control rod moves smoothly over the full range
Ignition/Vehicle - Off - Greater than 1 min
Ignition - On / Vehicle - In Service Mode
Verify DTC P003A is not set.
- If the DTC sets
  Test or replace the component: Compressor Air Intake Turbocharger Replacement
- Go to next step: If the DTC does not set
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify DTC P003A is not set.
- If the DTC sets
  Test or replace the component: Compressor Air Intake Turbocharger Replacement
- Go to next step: If the DTC does not set
All OK.