One problem related to differential unit has been reported for the 2001 Chevrolet Silverado. The most recently reported issues are listed below.
2001 z71 1500 Silverado chevy. The gears in the rear end shattered as I crossed a busy commercial street into on coming traffic. No crash incurred. This truck is just off ext. Warrt. 4year/100,000 mile. The truck has 82,800 miles on it. I have had this truck to the dealer 3 times complaining of a load noise coming from the rear end. This truck has had over 6,000 dollars of warrt. Work. Not to mention what I have put out of my own pocket. I am a self employed person, and without a truck I can not make a living. It has been at a repair shop now for 6 days!! I know I am not the only person out there with the same problem. Gm fix my truck.