When I have my wheel turned all the way to the left or right I hear a loud clicking noise that I can…

When I have my wheel turned all the way to the left or right I hear a loud clicking noise that I can seem to diagnose. It's a 1998 GMC 1500, there are no CV boots as it is a RWD truck & only 2 wheel drive. It seems to happen more when it's cold, & it's not all the time. I'm stumped but it doesn't sound good.

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