A/C Compressor Drive Belt
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The outward appearance of the belt (1) is similar to the current design serpentine belt. The reinforcing cord provides its unique qualities. The belt cord is made of a polyamid material. The polyamid cord is more elastic than the more traditional aramid or polyester cord designs. A tensioner is not needed.
Polyamid cord, when combined with a more elastic backing compound, ensures the belt is able to maintain the specified tension within the specified range of usage.