Review on ACDelco 36299 Professional Pulley Retainer by Marcelo Montalvo

This ACDelco 36299 professional pulley with screw was the easiest to install. The whole thing took 10 minutes. (Or Plug and Play) I installed this on my 1997 GMC Sierra. If you hear a small beep at startup, there's a good chance this is your problem. (also belt tensioner) the only thing that made my old part different from the new one was the size of the screw. Was 13mm, now 15mm. The thread has not changed at all, only the screw head. See photos for old, new and installed.