Some 2019 XT4 models may have a dead battery after sitting for several hours after a remote start. A dead battery may result after a remote start operation when one of the following occurs:
- Remote shutdown using the Remote Keyless Entry (RKE) transmitter (key fob)
- The remote start times out
- The Engine Stop/Start button is pressed to enter the Accessory or Run mode and then the button is pressed again to enter the Off mode.
Currently, the vehicle does not properly support KR75 Powertrain Relay functionality for Transmission Surge Accumulator performance, which can lead to a battery drain as the range command is set to undefined. As a result, the ECM gets stuck in a loop waiting for an input signal from the Electronic Transmission Range Select (ETRS). The loop keeps the network awake until there is another start/drive command of the battery discharges.
To avoid discharging the battery and to put the vehicle in the proper state, avoiding the battery drain loop, after remote starting the vehicle press the Park button on the transmission shift lever (ETRS) (Fig. 21) or press the Engine Start/Stop button (Fig. 22) to enter Run mode and then select any gear or Park.
Fig. 21
By providing an input signal through the ETRS after the remote start command, the battery drain is avoided.
Keep in mind that this is a remote start condition only and starting the vehicle manually using the Engine Start/Stop button will not cause the battery drain.
Fig. 22
GM Engineering is currently evaluating this condition and working on a repair recommendation. For additional information, refer to #PIC6350.
– Thanks to Chris Hightower
