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.

Verify DTC P0087, P00C7, P00E9, P00EA, P00EB, P00EC, P0106, P0107, P0108, P0111, P0112, P0113, P0114, P0117, P0118, P0119, P0128, P0181, P0182, P0183, P0201, P0202, P0203, P0204, P020A, P020B, P020C, P020D, P0216, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P02E4, P02E5, P02EE, P02EF, P02F0, P02F1, P0335, P0336, P0403, P0405, P0406, P042E, P042F, P049D, P062B, P062D, P0806, P0807, P0808, P080A, P1089, P111E, P1248, P1249, P124A, P124B, P1402, P1407, P140F, P1424, P163A, P16F3, P2006, P2008, P2009, P200A, P2010, P2015, P2016, P2017, P20F8, P2147, P2148, P2150, P2151, P2227, P2228, P2229, P2230, P228A, P228B, P228C 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
Verify the condition does not exist:
- Fuel Type Incorrect
- FuelContaminated/Poor Quality
- If a condition exists
  Refer to: Fuel System Specifications , or Contaminants-in-Fuel Diagnosis
- Go to next step: If no condition exists
Inspect for aftermarket devices which may affect the operation of the system.
- If a condition exists - Repair or replace as necessary
- Go to next step: If no condition exists
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 the DTC does not set.
- If the DTC sets
  Refer to: Circuit/System Testing
- Go to next step: If the DTC is not set
All OK.