Bad Alignment - Possible???

[Zilverado]

For starters, let me just take a moment to honor all of the men and women who have given, and are curently willing to give their lives to protect the freedoms that we all enjoy. GOD Bless them all!!

So now for my truck question...

I continue to have an issue with the truck wanting to pull to the right, both while driving and also while braking. Thinking my brakes may have been an issue, I replaced a number of front parts (hoses, callipers and wheel bearings). The problem persisted. So, I swapped the tires on the front and still no difference.

Earlier this year, when I first noticed the problem, I took the truck in for an alignment. The shop claimed they made some adjustments, and as far as I can recall, the truck tracked beautifully afterwards. Since I do not drive the truck all the time, I do not recall when the pull came back - or maybe I was just imagining that it was gone following the alignment???

So, is it possible that the alignment could have gone bad again? Could one of the adjustments that the shop made perhaps have failed again? I can't see how tie rod adjustment could go bad, but maybe I dropped a shim? But then I would guess things would be really loose.

Anyone have any thoughts on this? Thanks.