in auto 4 wheel my right front tire makes a knocking and jumping when turning left.
You may have a wheel bearing or drive shaft bearing going out. Have an expert in drive train repairs look at it. If you have an independent automotive repair shop you trust, go to him for a look see. If you go off road or use the truck for construction, there just may be some damage or junk causing some of the issues.
Search Chevrolet Silverado 1500 Questions
Chevrolet Silverado 1500 Experts
Related Models For Sale
Used Cars For Sale