The best way to keep your 2nd generation (2010, 2011, 2012, 2013, 2014, 2015 & 2016) Buick LaCrosse running reliably is to regularly change the motor oil and replace the filter on the LFX or LLT 3.6 liter V6 engines. Check out my DIY instructions for the procedure (with the replacement part numbers) by clicking on the text link or thumbnail image below.
2010-2016 Buick LaCrosse 3.6L V6 Engine Oil Change Guide
