Anyone change out there serpentine belt on a 5.7? I just did it and I have to say that if you do, do not buy a goodyear gatorback belt. This thing is a pain in the ass to install and all it did was make the loudest squealing noise... At first i thought it was the belt tensioner and i bought one from sparks trd, changed it out and it still did the same damn thing. I thought i was saving money by not buying OEM, but there lies my problem. The belt product itself compared from OEM is so different. The oem feels heavier, made better and is magenetic. And when i installed the belt it just slipped on just a little easier. Now I've learned my lesson on buying OEM from now on (well just for Toyota's).