Grinding noise on GMC Sierra 2500 HD

Average mileage: 156,500 (130,000–178,000)
2 model years affected: 2003, 2005
4 people reported this problem
2 people shared problem details
I have a 2003 GMC Sierra 2500HD extended cab pickup truck. When driving for a period of time on a highway and i decelerate there is a grinding sound in the rear portion of the vehicle. When i tap the gas pedal it goes away. Recently i put the truck in reverse and there was another grinding sound and the truck didnt goe into reverse. Otherwise the vehicle shifts fine in all gears. Please Help
When accelerating, there is grinding noise that sound like it is coming from the transfer case, it doesn't always happen but it happens very frequently. Also noticed a leak from where the yoke goes into the transfer case
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