Buick LeSabre coolant in oil, faulty rear tail lights, non-reading gas gauge, and transmission issues resolved on Buick LeSabre

Some Buick LeSabre owners report experiencing multiple issues, including coolant mixing with oil, which may indicate serious problems such as a blown head gasket or a cracked engine block. They emphasize the importance of having a mechanic inspect the vehicle to determine the cause and extent of this issue. Additionally, some owners encounter faulty rear tail lights, often due to problems with the bulbs, wiring, or light assembly, and they recommend checking bulbs and fuses before consulting a mechanic for further diagnosis. A common complaint among Buick LeSabre owners is a non-reading gas gauge, typically caused by a faulty fuel level sensor, with repair costs averaging between $679 and $793; they advise seeking professional assistance for accurate repairs. Furthermore, some owners report transmission issues, such as harsh shifting or slipping gears, which could point to problems like a failing torque converter or solenoid issues, and they suggest a thorough diagnostic check by a qualified mechanic to identify and resolve the underlying problems. Addressing these concerns promptly with professional help is crucial for maintaining the vehicle's optimal condition.