rdriver welcome! Here's a quick and cheap place to start looking - check the shock bushes top and bottom. have someone jounce the front end as you view the bushes if there's movement or split/cracks start there. Also listen for the noise while someone is jouncing the front end. Another idea, lie down by the front bumper so you can view all front end parts and while (someone you trust) is in the truck, engine running, have them wiggle (about 1/2 turn) the wheel left/right while you look at all the moving parts. You might hear the noise or not, if safe you can place a hand on moving steering gear and "feel" things too. Be careful not to get close to the spinning pulleys and the accessory belt = not good...
Others have mentioned control arm bushings and such. These too can be checked with similar as above method, only more caution is needed as more danger involved... With someone (once again that you trust) behind the wheel, engine running, you laying on the "side" of the front wheel looking at the arm to frame end, have helper at the wheel move the truck forward and hit the brakes quick, same thing moving truck rearward. If you see movement = bingo. Now for the front diff to arm check, here's where it gets real dangerous, 1st lie down "center of front" and have the helper at the wheel move truck rear ward and hit the brakes hard while you observe arm end. I suggest for when you need to have the helper at the wheel move forward that you get a broom or something to place in your hand (arm extended fully) as a reference to show them where the front of the truck is (meaning a place for them to "STOP" moving forward) so you can view any movement.
Should you determine the control arm bushings are worn, instead of replacing with stock units, I suggest considering "Tubular Control Arms". I did this and the complete kit, (upper and lower arms & bushings) cost less than the replacement bushings. Also, the stock bushings (at the time) were not available. I think I got mine at "Top Guns Customz" they were around $200.00