The stabilizer shouldn't make the truck pull to the left. Check the stabilizer travel full lock left and right, and make sure it is not being limited. The rubber bumpstop should just about come in contact with the shock on full right, and the shock should not top out on full lock left.
Did you drive the truck with the suspension before installing the stabilizer? if so, disconnect it, and drive it again. Again, it should not make the truck pull or anything like that.