20NA218
Service Bulletin Details
Public Details for: 20NA218
This technical bulletin provides repair information to correct a customer concern of possible crank no start or extended crank with dtc P12A6.
Models from 2021
2021 CADILLAC ESCALADE |
2021 CADILLAC ESCALADE ESV |
2021 CHEVROLET SUBURBAN |
2021 CHEVROLET TAHOE |
2021 GMC YUKON |
2021 GMC YUKON XL |
Models from 2020
2020 CHEVROLET SILVERADO 1500 |
2020 CHEVROLET SILVERADO 2500 |
2020 CHEVROLET SILVERADO 3500 |
2020 GMC SIERRA 1500 |
2020 GMC SIERRA 2500 |
Bulletin No.: Service Bulletin Date: 20-NA-218 December, 2020 TECHNICAL Subject: Possible Crank No Start or Extended Crank with DTC P12A6 Brand: Model: Cadillac Escalade Escalade ESV Model Year: Breakpoint Date: from to from to 2021 2021 SOP November 4, 2020 Chevrolet 2020 Silverado 2500HD/ 3500HD Suburban Tahoe 2021 2021 SOP November 4, 2020 2020 L84, L87 4.3 LV3 5.3 L82/L84 6.2 L87 2020 Sierra 2500HD/ 3500HD Yukon Yukon XL L84, L87 6.6 L8T Sierra 1500 GMC Transmission: 4.3 LV3 5.3 L82/L84 6.2 L87 Silverado 1500 2020 Engine: 6.6 L8T 2021 2021 SOP November 4, 2020 L84, L87 Involved Region or Country Additional Options (RPOs) Condition Some customers may comment on a possible crank no start or extended crank. Technician may find DTC P12A6 set current or in recent history. Cause The cause of the condition may be a software anomaly in the ECM (Engine Control Module). Correction Reprogram the ECM. Service Procedure Caution: Before downloading the update files, be sure the computer is connected to the internet through a network cable (hardwired). DO NOT DOWNLOAD or install the files wirelessly. If there is an interruption during programming, programming failure or control module damage may occur. Note: Carefully read and follow the instructions below. • • Ensure the programming tool is equipped with the latest software and is securely connected to the data link connector. If there is an interruption during programming, programming failure or control module damage may occur. 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 Copyright 2020 General Motors LLC. All Rights Reserved. • • • voltage. Refer to www.gmdesolutions.com 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. Ensure the ignition is turned OFF, load on the vehicle’s battery such as; interior lights, exterior lights (including daytime running lights), HVAC, etc. may affect the download process. Turn OFF or disable systems that may put a load on the vehicles battery such as; interior lights, exterior lights (including daytime running lights), HVAC, radio, etc. Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/ Maintenance (I/M) system status indicators to NO. Page 2 December, 2020 Bulletin No.: 20-NA-218 5644477 5431207 Bulletin No.: 20-NA-218 December, 2020 Page 3 Important: Techline Connect and TIS2WEB screens shown above. Important: If the Same Calibration/Software Warning is noted on the TLC or SPS Summary screen, select OK and follow on-screen instructions. The system will generate a warranty claim code (WCC) for documentation purposes only. Perform service information (SI) diagnostics to determine the cause of the condition. Use the applicable labor operation code when submitting a warranty claim. Do NOT use the WCC with the warranty claim submission. Important: When programming a module in GM’s new Vehicle Intelligence Platform, or VIP, the power mode (ignition) needs to be off or errors may occur. This involves the 2020 Chevrolet Corvette, Cadillac CT5 and CT4, as well as the upcoming full-size Chevrolet, GMC, Cadillac SUVs and Buick Envision. Serial Data Message Authentication also needs to have the ignition off. 1. Reprogram the Engine Control Module. Refer to K20 Engine Control Module: Programming and Setup in SI. 5644478 Page 4 December, 2020 Bulletin No.: 20-NA-218 5431209 Note: The screenshots above are an example of module programming and may not be indicative of the specific module that is being programmed. Module selection and VIN information have been blacked out. Important: To avoid warranty transaction rejections, you MUST record the warranty claim code provided on the SPS Warranty Claim Code (WCC) screen shown above on the job card. Refer to callout 1 above for the location of the WCC on the SPS screen 2. Record SPS Warranty Claim Code on job card for warranty transaction submission. Warranty Information Important: Warranty coverage code E2 applies for this module programming event. ECM reprogramming is covered for 8 years/80,000 miles (U.S.) or 8 years/ 130,000 km (Canada). 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 *2887038 Engine Control Module Reprogramming for Crank No Start or Extended Crank Condition 0.3 hr *This is a unique Labor Operation for Bulletin use only. Important: **To avoid warranty transaction rejections, carefully read and follow the instructions below: • The 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/SPS2. 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 TLC/TIS on the computer used to program the vehicle. 2. Select and start SPS/SPS2. 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. Bulletin No.: 20-NA-218 December, 2020 Page 5 Version 2 Modified Released November 17, 2020 Revised December 18, 2020 – Added 2020 Truck Models and updated programming info in Service Procedure Section. 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. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION