Review on ACDelco 12637204 Original Equipment Serpentine by Jason Unruh

The product arrived as described. It replaced the original belt that came with the car (10 years at 120,000 miles). Installation was easy and since my car has a K&N air intake I had enough room to see and work without having to remove other parts to remove and replace the belts. It is important to note that this is a larger serpentine belt. I had to purchase a separate smaller V-belt for my 2006 Yukon Xl Denali which runs an ACDelco 4K378 Professional V-Ribbed Serpentine Belt A/C Compressor. Both belts are silent, no noise. I'll be replacing the pulleys in the near future as well.