Review on 🚗 Gates K040378 Micro-V Serpentine Drive Belt: High Performance and Durability for Your Vehicle by Albert Lee

Belt worked well and fits perfectly. This belt is below the main serpentine belt. This is easy to change with a wrench to turn the GM torsion idler. Each belt has a separate idler pulley. Be sure to disconnect the negative battery terminal first with a 5/16 inch wrench to protect against the engine cooling fan starting unexpectedly. It can also run with the ignition off. The main V-ribbed belt must also be removed to gain access to the lower belt.