alignment

The only way to know is to get it in the shop asap to get it checked out.
ASAP being very important. You don't want to suddenly lose all steering.

Is it a new truck, or older?

 

Could be ball joints, steering linkage/worn out steering shaft

 

Have someone move the wheel back and forth while you watch the movement. Any part that does not move at the same time as the part it is connected to needs to be serviced!

Mikeeee

 

2013 Cascadia. 394000, Steering wheel points at ten oclock. Slight pull but alignment was checked with new steers about six weeks ago. Might just be the age and mileage.

 

A steering wheel that far off doesn't happen only with age and mileage, more likely a very sloppy mechanic that did an alignment and didn't check the position of the steering wheel.

At any rate, if the steering feels sloppy there are probably some very worn parts.

I have a 2013 Volvo. The steering is still crisp and solid, with little to no play.

There was an issue a while back with a slight pull to the right and some vibration. The vibration was worse when I was bobtail.
I brought it in to several terminals, but it was ignored until the steer tires showed some abnormal wear.
A new set of steers and an alignment fixed it, and it is still doing fine.

But it never felt sloppy like the OP describes.

One other thing could be blown out shocks, or even just one.
Is there any oil leaking from them?

Or a broken or loose spring.

 

Out here in the country that sounds a lot like the toe in is way off. Some smart guy through a chain over the steering cross bar to get pulled out. Regardless of how it happened, wear, abuse, or damage if the steer tires do not point the same direction the truck will go in the direction of the tire with the most traction. If you look at the tire tread they probabily have sharp edges on the outside.

 

The steering sector has an adjustment to tighten up the steering when it wears and gets loose. To get the steering wheel straight, if their is no damage to the steering componets, the steering usually gets taken off and repositioned.

 

Yep!
From my racing days:
Toed out and the vehicle will "hunt". Like a hound sniffing left and right while moving in a straight line.
Toed in and it will turn somewhat normal in with small amounts of steering movement, but dive and bite the turn at more aggressive amounts of turning.

Mikeeee