I know the Blazer / Jimmy tends to have slightly sloppier steering than many vehicles. However, I question to what degree. Here's a video of my steering when sitting still:

http://www.corolada.com/gmc/steering.html
(Its a Flash Video embedded in the page, so you don't have to download anything, just like YouTube)

While doing this, I'm making sure that I'm not moving it any more than there is slop. The wheels are stationary. Right in the middle, it feels like a little resistance / hump like where dead center might be. When driving down the road, there is just about as much slop. I've pushed on my wheels just to ensure that there isn't some slop in either the wheels not being tight enough (god forbid a dealer sells it with loose wheels) or some easy movement from the outside, and there is not. Is this normal? If not, does anyone know what it might be? Thanks in advance again!

 

pitman and idler arms, check those.

 

I do a lot of my own work, but have never touched steering. Am I pulling on / wiggling them to check for slop, or what is a good way of checking these parts? Thanks in advance again.

Could this have anything to do with the above:

https://blazerforum.com/m_107703/tm.htm

(My other post in here)

Combining consecutive posts.

 

You can check the pitman and idler arms for play by having someone in the truck turning the steering wheel as you are there, while you watch the steering linkage from underneith up front. You will probably have to remove the air dam from under the truck to get a good look at these components though.

 

Check the inner and outer tie rods at the same time.

 

The most common problem I have found (in regards to this issue) has been the Idler and Pitman arms, the easiest way I have been able to tell which is which when diagnosing is (place your knee frimly on the front bumper while someone else rocks the steering wheel (just a tad more than slack) and apply your full body weight, then jump off (just like checking the shocks), if you hear a 'clunk' (and your ball joints are in good condition) then your Idler arm is the culpret, on my two current Blazers, one 'clunked', I replaced the Idler arm, problem resolved, the other, no clunk and severe play in the wheel, replaced the the Pitman, problem resolved. Though this may only be with the Blazers I have owned (each is different), it was a trick shown to me by the local dealership. Also, giving each a good, hard yank to check for slop is also a good idea, and like blazeofglory suggested, check the tie rod ends.