2002 Suburban Knocks When Turning

Own a 2002 Suburban LT, and it knocks when making a left turn. It has 43,500 miles and tends to pull to the left slightly. Thought the Sub only needed an alignment but the knocking sound is concerning. Any suggestions?

Do you feel it in the steering wheel? If so, do a search on "intermediate steering shaft" and you will find lots of information on the subject.

//2000CAYukon

Yes, I feel it in the steering wheel. Thanks for the info, and I'll research it.