The 2016 Buick LaCrosse uses a standard 12-volt automotive lead-acid battery for the starter and electrical system. Replacement should match the correct group size and provide adequate cold-cranking amps for your engine. It is not a hybrid or high-voltage battery.
The exact battery size and specifications can vary by engine option and equipment, so the best approach is to verify the label on your current battery or consult the owner's manual or a Buick dealer. Below is a practical guide to identifying and selecting the correct battery for this model year.
Battery type and specifications
For most 2016 LaCrosse models, the starting and electrical system rely on a traditional flooded lead-acid battery housed in the engine bay. This is a standard 12-volt battery; it is not a plug-in hybrid battery or a high-voltage pack. The exact group size (for example Group 75 or Group 78 in GM's catalog) depends on the specific trim and region, so you should confirm by reading the current battery label or the owner's manual.
AGM vs flooded
GM generally used flooded lead-acid batteries in this model year, but some dealers or markets may offer or stock AGM replacements. If your current battery is labeled "AGM" or your replacement part is specified as AGM in the GM catalog, choose AGM. If not, a standard flooded battery will typically be compatible as long as the group size and CCA match the original spec.
How to identify the right replacement
Use these steps to confirm the correct battery before purchasing a replacement.
- Check the current battery label for the "Group Size" (for example, Group 75 or Group 78) and "CA/CCA" (cold-cranking amps). If the label is legible, match the replacement to those numbers.
- Consult the owner's manual or the Buick parts catalog for the recommended group size and battery type for your exact engine and trim.
- Verify terminal configuration and polarity to ensure the new battery will fit and connect correctly.
- Take note of climate and driving conditions; higher CCA ratings help in very cold weather.
Following these steps helps guarantee you select a battery that fits physically and meets the electrical demands of your LaCrosse.
Where to buy and installation tips
Battery shopping options include GM dealerships, auto parts chains, and independent repair shops. When replacing, consider having it installed by a professional if you’re not comfortable with terminals, battery bracket, and wiring. Always dispose of the old battery properly at a recycling center or auto parts store.
Environmental and safety notes
Handle batteries with care, wear eye protection, and keep metal tools away from battery terminals. If you smell gas or notice corrosion on terminals, have the system inspected before driving.
Summary
The 2016 Buick LaCrosse uses a standard 12-volt lead-acid automotive battery in the engine bay. The exact group size and whether you need a flooded or AGM battery depend on your engine/trim, so verify by checking the current battery label or the owner's manual. When shopping, match group size, CCA, and terminal layout, and consider your climate for performance. Have it replaced by a professional if you're unsure, and recycle the old battery responsibly.