I had the tires rotated yesterday on my 99 dually. The tire shop swapped the left rear dually tires with the ones on the front. Prior to this the truck tracked true and there were no problems. Now it is pulling to the right. I checked the tire pressure in the front tires and pumped them up to 70 psi. This had no effect. Prior to taking it back to the shop are there any suggestions? Thank you in advance John.