Some Buick Enclave owners report experiencing issues with their air conditioning not blowing cold air, often due to refrigerant leaks. These leaks can go unnoticed until the system fails to provide adequate cooling. Additionally, some owners find that a clogged or leaking AC evaporator results in warmer air coming from the vents than expected. Proper maintenance of the air conditioning system is crucial for optimal performance, as diagnosing and resolving common issues like weak airflow and refrigerant leaks is essential for a comfortable driving experience. It is advisable to address any refrigerant leaks and ensure the evaporator is functioning correctly to restore cooling efficiency and prevent further problems.

Some Buick Enclave owners report experiencing transmission failure as early as 17,641 miles, highlighting the importance of addressing the issue promptly, especially if the vehicle is still under warranty. Transmission problems are not uncommon, with many owners noting issues around 99,000 miles. Early model years, particularly from 2008 to 2009, have been associated with frequent failures due to a weak wave plate that can damage other vital components. If the vehicle is under warranty, owners may find that the transmission-related problem is covered, potentially saving on significant repair costs. It is advisable for owners to verify the warranty terms to determine if transmission failures are included in the coverage. Additionally, some owners have found that using additives can help mitigate minor transmission issues and enhance overall performance, possibly extending the transmission's lifespan. For those facing transmission failure, contacting the dealership or manufacturer is recommended to explore repair or replacement options under the warranty.