how to rep.front steering excesive back lash play? on 2003 GMC Envoy

when I was drive my car the steering hoop not straight,sometime it turn littel to right and sometime turn it to left.
I make wheel alignment and not changed this problem.
the mechanic told me the problem inside steering tube box.
please give me solve the problem as soon as possible.
THANKS.

1 answer
SOUNDS LIKE BAD TIE ROD ENDS. SEEK FRT END INSP TO DETERMINE WHAT IS WORN OUT