I change mine last weekend, 137000 miles, original belt. It still looked good and it is now under the back seat as a spare.

 

I could have sworn on my 2007 it says that its good for 100,000mi......

 

"I change mine last weekend, 137000 miles, original belt. It still looked good and it is now under the back seat as a spare."

Good plan. As easy as these belts are to change, a spare in the truck is always a good idea. Along with a 1/2" breaker bar and correct socket for lug nuts.

100K+ miles is not unreasonable.

 

For how cheap they are replacing them at 60k as part of the cooling system maintenence probably isnt a bad idea