If you’re the owner of a 2010-2012 Buick LaCrosse, Regal, Chevrolet Equinox and/or GMC Terrain equipped with either an LAF or LEA 2.4-liter four-cylinder engine, this post is for you. General Motors has sent letters asking 778,956 owners to take their vehicles to their local dealership to reprogram the software that monitors the oil system.
Apparently, the vehicles are at risk of going too long in between oil changes, something that has yielded a higher-than-normal number of warranty claims for the engine’s balance chain. The balance chain is the part that links the balance shaft to the crankshaft, and a worn one can produce higher noise levels. The service will be done at no charge until Feb. 28, 2015. Though afterwards, the dealer could charge the customer.