PIE0579
Service Bulletin Details
Public Details for: PIE0579
This engineering information (ei) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the malfunction indicator lamp (mil) illuminated.
- 2020 -
Models from 2020
2020 CADILLAC CT4 |
2020 CADILLAC CT5 |
2020 CADILLAC XT4 |
2020 CADILLAC XT5 |
2020 CHEVROLET BLAZER |
2020 GMC ACADIA |
Subject: Engineering Information – Malfunction Indicator Lamp (MIL) Illuminated, DTC P0496 Set Attention: Proceed with this EI ONLY if the customer has commented about this concern AND the PIE number is listed in the Global Warranty Management / Investigate History link (GWM/IVH). If the customer has not commented about this condition or the EI does not show in GWM/IVH, disregard the PIE and proceed with diagnostics found in published service information. THIS IS NOT A RECALL — refer to the latest version of Service Bulletin 04-00-89-053 for more details on the use of Engineering Information bulletins. Brand: Cadillac Model: CT4 Model Year: VIN: from to from to 2020 2020 — — Engine: Transmission: Equipped with 2.0L Engine (RPO LSY) Equipped with 8 SPD Transmission (RPO M5N) CT5 Equipped with 10 SPD Transmission (RPO MHS) XT4 Equipped with 9 SPD Transmission (RPO M3H) XT5 Equipped with 8 SPD Transmission (RPOs M3G, M3H, M3T) Chevrolet Blazer Equipped with 9 SPD Transmission (RPO M3T) GMC Acadia Equipped with 9 SPD Transmission (RPO M3G) Involved Region or Country North America Condition Important: If the customer did not bring their vehicle in for this concern, DO NOT proceed with this EI. Some customers may comment on the malfunction indicator lamp (MIL) illuminated. Technicians may find DTC P0496 set. Cause GM Engineering is attempting to determine the root cause of the above condition. Engineering has a need to gather information on vehicles PRIOR to repair that may exhibit this condition. As a result, this information will be used to "root cause" the customer's concern and develop/validate a field fix. Correction If you encounter a vehicle with the above concern, perform the following and contact the engineer listed below with your findings. Perform SI Circuit / System Verification diagnostics first. If nothing is found, perform the following Service Procedure for air leak checks. 1. Remove the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement in SI. 1 2. Remove the air cleaner outlet intermediate duct. Refer to Air Cleaner Outlet Intermediate Duct Replacement in SI. 3. Remove the turbocharger outlet duct connector. Refer to Turbocharger Outlet Duct Connector Replacement in SI. Verify the following conditions DO NOT exist. 1. G58 Evaporative Emission Purge Pump — Incorrect connection / Leaking / Visible Damage 2. Q12 Evaporative Emission Purge Solenoid Valve — Incorrect connection / Incorrect installation / Leaking / Visible Damage 3. Evaporative Emission Canister Purge Tube — Cracked / Disconnected / Incorrect connection / Leaking / Loose / Visible Damage Note: If a leak is found at any step during diagnosis, call the engineer before continuing. You can use SI for directions to hook up the Evaporative Emission System Tester (EEST) or separate the purge tube at the purge valve. 1. Smoke test system from the purge pump inlet to the purge valve. 2. Install the fitting J41413-311 supplied with the EEST. 3. Turn the smoke machine on. 4. Look for a leak in the purge pump body (internal O-ring). Note: If a leak is found at any step during diagnosis, call the engineer before continuing. If NO, go to the next step. Look for a leak at pump to tube connector (O-ring). Note: If a leak is found at any step during diagnosis, call the engineer before continuing. If NO, go to the next step. Look for a leak at the purge tube to T-fitting. Note: If a leak is found at any step during diagnosis, call the engineer before continuing. If NO, go to the next step. Look for a leak between the purge valve and adapter. Note: If a leak is found coming from the valve into the adaptor, DO NOT SEPARATE, and call the engineer before continuing. If NO, go to the next step. Look for an internal valve leak past the valve O-ring into the adapter. DO NOT REMOVE the valve from the adapter. Important: If a leak is found coming from the valve into the adapter, DO NOT SEPARATE, and call the engineer before continuing. Contact Information The Contact Information has been redacted. Please include the following information if leaving a message: – Technician name – Dealer name and phone number – Complete VIN and repair order (R.O) number On the repair order, document the date and time the call was placed (even if the engineer was not reached). If engineering is unable to return the call within one hour, proceed with diagnosis and repair based on information found in SI. Warranty Information If engineer was contacted or required information was provided, use: Labor Operation Description Labor Time 4087508* Engineering Information - Malfunction Indicator Lamp (MIL) Illuminated 0.6 hr *This is a unique labor operation for bulletin use only. Version 1 Modified Released July 30, 2020 2