Buick Enclave engine hesitation under load at high speeds and inclines on Buick Enclave

Some Buick Enclave owners report experiencing engine hesitation under load at high speeds and inclines, which may be attributed to several factors. These issues can stem from a misfiring engine cylinder, potentially leading to coil and spark plug breakdowns that affect performance. Additionally, a clogged catalytic converter can trigger a check engine light and contribute to hesitation during acceleration or when climbing hills. Spark plug problems are also noted as a common cause of engine hesitation in these conditions. Furthermore, failures in the HVAC blend door actuators may impact airflow, potentially exacerbating performance issues. To mitigate these concerns, it is advisable for owners to have their engine components checked for misfiring, ensure the catalytic converter is clear, inspect and replace spark plugs as needed, and verify the functionality of the HVAC blend door actuators.