Why can't the central lock of the Buick LaCrosse open other doors?

[HarperLee]

The reasons why the central lock of the Buick LaCrosse cannot open other doors are: 1. The remote control is out of battery; 2. The car battery is dead, and the remote receiver cannot function; 3. If the key cannot turn, it may be due to rust or foreign objects in the lock cylinder; 4. If the key can turn but still cannot open the door, it may be because the internal lock rod has come loose. The Buick LaCrosse is a new mid-to-high-end sedan launched by SAIC-GM, with body dimensions of 5000mm in length, 1858mm in width, and 1497mm in height. In terms of power, the LaCrosse is equipped with a 3.0L V6 SIDI direct-injection engine, delivering a maximum power of 190kW and a maximum torque of 296Nm, with a standard 6-speed automatic transmission across the entire lineup.