GM Genuine Parts Drive Belt Tensioner Assemblies are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These assemblies are spring-loaded pulleys designed to draw tension on your vehicle's serpentine belt.
Genuine ACDelco Drive Belt Idler Pulley 12580774
Genuine ACDelco Drive Belt Idler Pulley 12566893
Genuine ACDelco Drive Belt Tensioner 12670574
Genuine ACDelco Drive Belt Tensioner Assembly with Pulley 38274
Genuine ACDelco Drive Belt Tensioner Assembly with Pulley 38382
Genuine ACDelco Drive Belt Tensioner Assembly with Pulley 39242
