K 3500 Truck 4WD V8-454 7.4L VIN J SFI (1996)
1. Route belt over all of the pulleys except the belt tensioner.
2. Release belt tensioner.
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Use a wrench on the pulley axis bolt to rotate the tensioner clockwise and release tension.
3. Belt over tensioner pulley. Slowly allow tensioner to move back into installed position.
4. Check the belt for correct "V" groove tracking into each pulley.