Yukon XL 2WD V8-5.3L (2011)
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.