Made a tight u turn to the left and heard a loud " pop " from front end. After straightening wheel the steering completely locked up. Give it everything ive got and cant turn wheel right or left.
Sounds like you broke the steering box internally, I'm surprised you got it too straighten out.
Thats what i thought too so i disconnected the pittman arm from under the gear box and and the steering wheel then turned easily which leads me to believe its something downstream of the gear box .
Check the idler arm, they seem too be a high fail unit, just cause they don't get lubed as they should, happened on my Yukon but I didn't loose steering it just started to make the front end wobble at 20mph.
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