Why is the steering wheel not straight as the car goes straight?

Something down the steering column from Your dimmer switch harness is interfering with the harness....Follow the steering shaft from the floor board up the column while turning the steering wheel back and forth.....A fire hazard exist if not corrected

A wheel alignment will help if that is the only thing causing the car to go right. If you have hit something , like a curb it could have bent or broken something in the front end. The wheel should return to straight if the alignment is all that is needed.

there is a load on the lock pin in the steering column try turning the steering wheel a bit left or right to release the pin as you try turning the key.
Steering wheel locks never lock straight ahead as the idea is that if the car is being stolen it will turn a circle rather that move straight

bad bearings will do strange things, check your front end for play

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The spring goes into a hole in the steering column. It rides on a round plate back behind the steering wheel. Usually when the tires are straight, the hole is in the upper left side.

the steering wheel is stuck to the left but its driving straight?

It could be, first thing is to make sure all your tire pressure is correct. Don't go by the gauge at the air pump, by your own tire gauge and there an average price is 99 cent at Auto Zone. If all your tire pressure is correct, (your can get that information on a sticker at the drivers door or where your spare tire is located in the truck. If the car's steering wheel is still not straight,then you need the car's wheel aligned at a alignment shop. If your tires still vibrating then your going to have to get your wheels rebalanced too and check the front end steering componets: ic tie rod ends etc. Good luck and hope this helps, have all the steering components greased to tighten up any play in the joints. Keep me posted, be glad to answer any questions you may have. 

Get this vehicle into an alignment shop and have the front end checked out before you kill someone