Proper Key Fob Inspection and Battery Replacement

Any time the Remote Keyless Entry (RKE) transmitter (key fob) on 2017-2022 GM vehicles is opened, such as when inspecting the fob for proper operation or replacing the battery, the fob case must be sealed properly during reassembly. (Fig. 20) If the fob case is not assembled correctly, the water seal may be pinched, leading to an ineffective seal and possible fob failure.


Fig. 20


After opening the fob, follow these steps to reassemble the fob:

  1. Ensure that the silicon mat is correctly positioned with no gaps or wrinkles. (Fig. 21) Set the fob, button side down, on a hard surface.


Fig. 21


  1. Align the emblem cover side of the fob on top of the button side of the fob. Make sure it is properly seated and the seal is not pinched. (Fig. 22)


Fig. 22


  1. Snap the cover together by pressing down with your palm. (Fig. 23)


Fig. 23


TIP: All 2017-2022 GM vehicles equipped with Remote Keyless Entry/Passive Entry (RPO ATH) and Keyless Open/Start (RPO AVJ) must follow the new warranty requirement outlined in Bulletin #21-NA-068 for key fob warranty claims. To address the number of mismatched key fobs, the requirements include GM authorization for key fob replacement along with a photo of the Signal Detection screen from the EL-52545 TPMS and RF Tool confirming that the VIN of the fob matches the service vehicle listed on the job card (repair order). (Fig. 24)


Fig. 24


For additional information, refer to Bulletin #21-NA-162.


– Thanks to Mike Waszczenko

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