If your 2021 through 2023 Cadillac Escalade is difficult to start, or refuses to start at all (no engine crank) after being parked and turned off for approximately a day, this may result from a known issue causing low or dead batteries in several GM SUV models. Now GM TechLink has determined the likely cause and provided a fix technicians can apply to correct the battery drain problem.
The identified issue that is likely to cause low battery charge or a dead battery in a parked Cadillac Escalade is related to the third-row power-folding seat switches. If the switch connectors to the wiring harness are loose or unplugged, causing a loss of power connection, the Escalade’s body control module (BCM) will remain switched on in standby mode when the engine is turned off.
If the body control module remains in standby mode, it draws power to operate, but with the engine inactive, it drains this electricity directly from the battery. The draw is approximately 200 to 300 milliamps and continues until the BCM has completely drained the battery charge, resulting in a dead battery after roughly a day or slightly more.
In diagnosing the problem, the GM technician will first check for a battery draw of the known level in your Cadillac Escalade. If the draw is present, the technician will move on to further diagnosis and the fix.
The next stage of testing is to see if the power-folding seat switches for the third seating row operate. These switches are located in the cargo area on the right-side rear quarter panel. Failure of the seats to operate indicates an internal connector between the switches and the wiring harness is unplugged or otherwise failing to make contact.
Checking the switch connections inside the interior panels enables the service worker to determine if one or more switches are disconnected from the harness connector. Ensuring the switches are securely plugged in and functional will cause the BCM to stop remaining in standby mode, eliminating the excess power draw when your Cadillac Escalade is parked and switched off.