Every time the blazer is in drive there is a loud knocking noise coming from the back end. The noise only decreases when turning or when you let off the gas. I have had the universal joints replaced and it didn't change anything at all. The blazer is still am king the loud knocking noise. Do you have any idea what could be causing the knocking.
have the same problem?
Thursday, September 5th, 2013 AT 6:07 PM