19NA149
Service Bulletin Details
Public Details for: 19NA149
This technical bulletin provides repair information to correct a customer concern of malfunction indicator lamp (mil) illuminated with dtc P3075 set.
- 2019 -
Models from 2019
2019 CHEVROLET SILVERADO 1500 |
2019 GMC SIERRA 1500 |
Bulletin No.: Service Bulletin Date: 19-NA-149 September, 2019 TECHNICAL Subject: Malfunction Indicator Lamp (MIL) Illuminated with DTC P3075 Set Brand: Model: Chevrolet GMC Model Year: VIN: from to Silverado 1500 (New Model) 2019 2019 Sierra 1500 (New Model) 2019 Involved Region or Country from Engine: Transmission: L3B All to 2019 North America, N.A. Export Regions Additional Options (RPOs) Condition Some customers may comment on the MIL being illuminated. A technician may find the following DTC set current or in history: • P3075: Engine Coolant Pump Low Current Perf Cause The cause of the condition may be one or more of the following: possible cooling system low on coolant or air trapped in cooling system. • A software anomaly. • Cooling system low on coolant. • Air trapped in cooling system. Correction If you encounter a vehicle with the above condition, do NOT replace the coolant pump assembly at this time, but follow the Service Procedure. Service Procedure Note: Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. Install a GM Authorized Programming Support Tool to maintain system voltage. Refer to for further information. If not available, connect a fully charged 12 V jumper or booster pack disconnected from the AC voltage supply. DO NOT connect a battery charger. Verify if the Engine Control Module (ECM) has the latest software available: • If the vehicle has the most current level of software, use SI to perform a system diagnostic. • If the vehicle does NOT have the most current level of software, continue on to the next repair steps. 1. Reprogramming the ECM to the latest software available. Refer to K20 Engine Control Module: Programming and Setup in SI. Copyright 2019 General Motors LLC. All Rights Reserved. 2. Clear all codes. 3. Referring to SI, run the vehicle under the conditions for setting the DTC. • If DTC P3075 does NOT reset, return the vehicle to the customer. • If DTC P3075 resets, use SI to continue on to the repair steps below. If DTC P3075 resets: 1. Check for a low coolant condition. If low, pressure test the cooling system to confirm no coolant leaks are present. 2. Repair any leaks in the cooling system using SI. Once the coolant leak has been repaired, refer to the appropriate Cooling System Draining and Filling procedure in SI, for coolant fill and bleeding procedures. Note: The P3075 P3076 can detect coolant flow-based failures. The intrusive diagnostic test will run once per ignition cycle if all enable conditions are met per SI. The intrusive diagnostic will run the coolant pump at roughly 4000 rpm for 15 seconds and evaluates the Page 2 September, 2019 Bulletin No.: 19-NA-149 pump motor AC current to be within expected range. The coolant pump AC current feedback will be lower if the cooling system is leaking or low on coolant. 3. Using GDS, confirm P3075 has ran and passed in the current drive cycle to ensure the diagnostic has executed and no fault is detected before releasing the vehicle back to the customer. If the vehicle returns for a second time with DTC P3075 set, then replace the Coolant Pump assembly. Parts Information No parts are required for this repair. Warranty Information For vehicles repaired under the Emission coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Labor Operation Description Labor Time *2886348 Engine Control Module Reprogramming with SPS for DTC P3075 0.3 hr *This is a unique Labor Operation for Bulletin use only. *To avoid warranty transaction rejections, carefully read and follow the instructions below: • The SPS Warranty Claim Code must be accurately entered in the “SPS Warranty Claim Code” field of the transaction. • When more than one Warranty Claim Code is generated for a programming event, it is required to document all Warranty Claim Codes in the “Correction” field on the job card. Dealers must also enter one of the codes in the “SPS Warranty Claim Code” field of the transaction, otherwise the transaction will reject. It is best practice to enter the FINAL code provided by SPS. Warranty Claim Code Information Retrieval If the SPS Warranty Claim Code was not recorded on the Job Card, the code can be retrieved in the SPS system as follows: 1. Open TIS on the computer used to program the vehicle. 2. Select and start SPS. 3. Select Settings. 4. Select the Warranty Claim Code tab. The VIN, Warranty Claim Code and Date/Time will be listed on a roster of recent programming events. If the code is retrievable, dealers should resubmit the transaction making sure to include the code in the SPS Warranty Claim Code field. Version 1 Modified Released September 03, 2019 GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. 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