
The model for the new Buick LaCrosse is Delco 347. The functions of the battery are: 1. Providing power for the car's starter and ignition system; 2. Supplying stable DC power to the car's electrical appliances, ensuring the operation of the car's electronic circuits and DC lighting system; 3. Stabilizing the surge voltage of the AC power generated by the alternator. The new Buick LaCrosse is a mid-size 4-door 5-seater sedan with body dimensions of 5026mm in length, 1866mm in width, and 1459mm in height, with a wheelbase of 2905mm. It is equipped with a 1.5T turbocharged engine and a 9-speed automatic transmission, delivering a maximum power of 124 kW and a maximum torque of 250 Nm. The drive system is front-wheel drive, with a MacPherson independent suspension at the front and a multi-link independent suspension at the rear.

Last time I helped a friend replace the for a 2023 Buick LaCrosse, I researched this. The 2.0T model comes with an original 80D26L specification AGM start-stop battery, with a cold cranking amp (CCA) of around 750. The 1.5T version is slightly smaller, with a capacity of about 70 ampere-hours. However, two points to note: there may be adjustments between different year batches, so it's best to take a photo of the label when removing the old battery; never replace it with a regular battery for vehicles with auto start-stop—AGM batteries, though more expensive, can withstand frequent starts, whereas regular batteries would fail within six months. Also, friends in northeastern regions should opt for a model with higher CCA; being able to start at -30 degrees Celsius is the real test of capability.

After testing the configurations of the third-generation LaCrosse, the new model has three scenarios: all 2023 models come with AGM batteries, with 2.0T models using the 80D26L (L stands for left terminal), measuring 242175190mm. A key reminder for modification enthusiasts: do not directly connect dash cams to the battery, as a static current exceeding 30mA can drain it completely in two weeks. It is recommended to install a dedicated power supply box with low-voltage protection. When replacing the battery, ensure the vehicle remains powered on; otherwise, the window anti-pinch and sunroof functions will require recalibration.

Having repaired vehicles for 15 years, I've learned the LaCrosse battery is quite particular. The new models all use 12V lithium-iron batteries, but specifications vary by trim: the Elite trim uses a conventional 70Ah battery, while Premium trims and above come with 80Ah AGM batteries. The most critical detail is the terminal orientation (L/R) - installing the wrong one won't fit. Always replace at authorized shops equipped with GM-specific scanners to reset the BMS system. Here's a hidden pitfall: after complete discharge, use a 15V+ charger for 8-hour slow charging - fast charging can damage the power control unit.


