Buick LaCrosse total power loss after replacing headlights and components, electrical issue unresolved on Buick LaCrosse

Some Buick LaCrosse owners report experiencing total power loss after replacing headlights and components, leading to issues such as the radio turning off and restarting, erasing all temperature and radio settings. Additionally, some drivers have noted reduced engine power, where the vehicle struggles to exceed 20 miles per hour, which could indicate serious underlying problems. Owners of second-generation LaCrosse models frequently report the check engine light activating, accompanied by a burning smell due to excessive carbon buildup. A weak battery or alternator not charging properly may also contribute to total power loss, making it essential to check for diagnostic codes when the check engine light is illuminated. Furthermore, some owners experience loss of engine power while driving, with warning lights flashing and gauge needles bouncing, particularly in cold and wet weather conditions. It is crucial for owners to address these electrical issues promptly to prevent further complications.