The OTC Camshaft Actuator Locking Tool, No. 6745, engages the slots in the face of the actuator and bolts to the cylinder head and cover to hold the actuator in position. This allows the tool to remove or install the actuator bolt. This tool is similar to EN-50793, the company says, and works on 2013-2014 Cadillac ATS, 2014 Cadillac CTS, 2013-2014 Chevrolet Malibu, 2014 Chevrolet Impala and Buick Regal 2.0L and 2.5L engines.