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The belt tensioner is not located on the alternator. The serpentine belt tension is maintained by the tensioner pulley, located below and to the left (looking from the front of the truck) of the alternator, near the coil and oil dipstick tube. Use a 15MM box-end wrench to turn the bolt in the center of the pulley clockwise, and the belt will slip right off the alternator. This really was a great design... It literally takes less than a minute to change/remove/replace the belt. This applies to the 1999 5.9 (and 5.2 I think)

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13y ago

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