wheel alignment

I have a 95 GMC Sierra ext cab 2wd. I have had this problem for a long time and now it is really bad. When it is wet out and I loose traction and the rear tires slide, my steering wheel goes from 12 oclock to 10 oclock. It goes back to normal after I make a 90 degree turn to the right. Now...

I have a 95 GMC Sierra ext cab. I have been having some trouble with it recently. I had a major vibration which i found out to be the carrier bearing on the drive shaft, changed it. So now (and it has been doing this since I got the truck 3 years ago) for some reason when it is wet out and any...