PIT6044F
Service Bulletin Details
Public Details for: PIT6044F
This preliminary information communicates that a software update is in the works and to disconnect the 12 volt battery to clear the codes.
Models from 2024
2024 CADILLAC LYRIQ |
2024 GMC HUMMER EV |
Models from 2022
2022 GMC HUMMER EV |
Bulletin No.: PIT6044F Published date: 12/1/2023 Preliminary Information PIT6044F Service High Voltage with MIL and/or DTCs Models Brand: Model: Model Years: VIN: from to Engine: Transmissions: BrightDrop Zevo 600 eLCV 2023 ALL All All All Cadillac EV LYRIQ 2023 - 2024 ALL All All All GMC HUMMER EV 2022 - 2024 ALL All All All GMC HUMMER EV SUV 2024 ALL All All All Involved Region or Country North America Condition Some customers may comment the MIL is illuminated or Service High Voltage Message displayed on the IPC. A technician may nd any of the following DTCs; U2220, U2221, U2222, U2223, U2224, U2225, U2226, U2227, U2228, U2229, U222A, U222B, U222C, U222D, U222E, U222F, U2230, U2231, U2232, U2233, U2234, U2235, U2236, U2237, and/or U2C11 set as current or history. Cause A potential software anomaly may be present. Correction: 1. Verify the vehicle has one or more of the following DTCs set; U2220, U2221, U2222, U2223, U2224, U2225, U2226, U2227, U2228, U2229, U222A, U222B, U222C, U222D, U222E, U222F, U2230, U2231, U2232, U2233, U2234, U2235, U2236, U2237, and/or U2C11 set as current or history. Note: If all Loss of Communication DTCs are set U2220-U2237 as current or history (depending on vehicle application), do not continue with the procedure. Please start a TAC case and reference this P.I. 2. Perform the Battery Negative Cable Disconnection and Connection procedure outlined in Service Information. Warning: Always ensure the Battery Maintenance Mode is inactive before disconnecting the 12volt battery. This mode can be active with the ignition o , regardless of whether the vehicle charging cord is plugged in or not. When this mode is active, the on-board high voltage battery charger will energize the 12-volt battery cables and charge the 12-volt battery. Disconnecting the battery cables while this mode is active may result in an electrical shock or a burn from hot battery cable leads. 3. Wait 15 mins, then reconnect the 12v following the Battery Negative Cable Disconnection and Connection procedure outlined in Service Information. 4. Place the vehicle in Propulsion “Ready” mode, then turn the vehicle “OFF” and remove the keyless transmitter from the vehicle and place the transmitter in a safe location approximately 10 ft away. Wait 15 mins. Perform this two times. 5. Place the vehicle in Service mode and use GDS2 and clear all DTCs. If any of the following DTCs: U2220, U2221, U2222, U2223, U2224, U2225, U2226, U2227, U2228, U2229, U222A, U222B, U222C, U222D, U222E, U222F U2230, U2231, U2232, U2233, U2234, U2235, U2236, U2237, and/or U2C11 return, start a TAC case, and reference this P.I. 6. After completing steps 1-5 above, program the K16 BECM (Battery Energy Control Module) as outlined in Service Information. 7. After programming the BECM, perform the Battery Negative Cable Disconnection and Connection procedure outlined in Service Information / steps 2 & 3 above 1 time. 8. Verify no DTCs are set. If any of the following DTCs: U2220, U2221, U2222, U2223, U2224, U2225, U2226, U2227, U2228, U2229, U222A, U222B, U222C, U222D, U222E, U222F U2230, U2231, U2232, U2233, U2234, U2235, U2236, U2C11 and/or U2237 return, start a TAC case, and reference this P.I. Warranty Information For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Labor Operation 5080388 Add Time (as Required) Description Labor Time Hybrid/Electric Vehicle Battery Pack Communication 1.5 Hr. Module manual reset K16 Battery Energy Control Module Program 0.4 Hr. *This is a unique Labor Operation for Bulletin use only Version History Version 7 Modi ed 08/03/2023 - Created on. 08/09/2023 - Updated to include U2C11 09/01/2023 - Updated to add more information for the LYRIQ 09/05/2023 - Update more programming numbers for 2024 LYRIQ 10/26/2023 - Update information for BrightDrop and HUMMER EV 10/30/2023 - Updated correction. 12/01/2023 - Updated correction. © 2024 General Motors. All Rights Reserved.