PIT5973A
Service Bulletin Details
Public Details for: PIT5973A
This preliminary information communicates an issue with a battery going dead causing by the hand free liftgate module. Dealer are to replace the hands free liftgate module and also gm engineering is working on new bcm calibrations.
Models from 2023
2023 CADILLAC ESCALADE ESV |
2023 CHEVROLET SUBURBAN |
2023 CHEVROLET TAHOE |
2023 GMC YUKON XL |
Models from 2022
2022 CADILLAC ESCALADE ESV |
2022 CHEVROLET SUBURBAN |
2022 CHEVROLET TAHOE |
2022 GMC YUKON XL |
Bulletin No.: PIT5973A Published date: 01/27/2023 Preliminary Information PIT5973A Dead Battery After Recall N222386380 and / or Unwanted Liftgate Opening Models Brand: Model: Model Years: VIN: from to Engine: Transmissions: Cadillac Escalade Models 2022 - 2023 All All All All Chevrolet Suburban 2022 - 2023 All All All All Chevrolet Tahoe 2022 - 2023 All All All All GMC Yukon Models 2022 - 2023 All All All All Involved Region or Country North America Additional Options (RPO) Condition TC2 - Hands Free Liftgate Some customers may comment after recall N222386380 (DRL May Not Deactivate) was completed, that they now have an issue with the battery going dead. In addition, they may also have a complaint when they are standing outside the vehicle, near the liftgate with the fob, the power liftgate will open on its own, which is unrelated to when the recall N222386380 was completed. NOTE: If the battery draw is being monitored, when the draw is duplicated, this issue will cause a battery draw well over 10 amps. The cause of this concern could be an issue with the K171 Hands Free Liftgate module repeatedly sending a false wake up request to the BCM commanding the liftgate to open, but the power liftgate may or may not actually open, see Important statement below. In addition to that, after the BCM is updated for recall N222386380 , if the BCM is woke up by any LIN device, it is now waking up additional modules, causing a higher amp draw on the battery than it normally would have prior to having the recall completed. This will lead to the battery being discharged at a faster rate. Cause Important: For the power liftgate to actually open all of the following criteria must be meet before the power liftgate will actually open from the false hands free request: 1. Vehicle must be in park, 2. Power liftgate switch turned on (max or 3/4), 3. Hands free setting in the radio must be turned on (open or open/closed), and 4. The fob is within 1 meter of the liftgate itself. Note: The BCM update for N222386380 is not the root cause of the battery draw, but it is magnifying the draw on the battery if the BCM is inadvertently getting woke up by a LIN device. In this case, the K171 Hands Free Liftgate module is repeatedly waking up the BCM, causing a very high amp draw (10+ amps) on the battery. Correction: If the customer has both complaints of a battery going dead after recall N222386380 , and unwanted opening of the power liftgate, then the most likely cause is the K171 Hands Free Liftgate module. The K171 Hands Free Module will need to be replaced to correct this concern. In addition, GM engineering is working on new BCM calibrations to reduce the battery draw magni cation when the BCM is woke up by a LIN device. Note: The BCM update for N222386380 is not the root cause of the battery draw, but it is magnifying the draw on the battery if the BCM is inadvertently getting woke up by a LIN device. If the K171 Hands Free Liftgate module is not available, due to a parts backorder, etc., then the F35RA 10amp fuse, for the K171 Hands Free Liftgate module, could be removed, which would allow the customer to drive the vehicle until the part is available. With the fuse removed, the hands free liftgate feature will not work, but the power liftgate will still function normally. In addition, if the truck is equipped with Trailer Tire Pressure Monitor system (RPO UET), then that feature will also be lost while the fuse is pulled. Please review this option with the customer if the K171 Hands Free Liftgate module is not readily available. Tip: The F35RA fuse can also be pulled/removed for testing to see if the issues go away. 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 2063020 *6486208 Description Labor Time Rear Closure Hands Free Sensor Replacement Use Published Time Remove Fuse F35RA - Use This Unique Labor Operation To Allow The Customer To Drive The Vehicle While .2 Hrs. Waiting For A Hands Free Module * This is a unique labor operation for bulletin use only. Version History Version 2 Modi ed 01/25/2023 - Created on. 01/27/2023 - Update to warranty section © 2023 General Motors. All Rights Reserved.