Chevrolet Silverado Differential Noise

My 2000 Silverado Has A Roaring Noise Coming From The Rear Diff. It Is Alot Worse When Pulling A Trailer That Without. I've Been Told It...

I Have A 1998 Chevy 4x4 1\2 Ton Truck, And My Rear Differential Is Making Noise At Any Speeds I Had It Looked At By A Expert He Says I Need...

I Have A 1997 Chevy C1500 P/u. For Awhile Now Its Been Making A Whine Sound, Sounds Like From Differential. Usually Comes Around 20 Mph And...