I seem to be having issues with my EPS on my 2013 1500 Express. I've had the truck since new in Aug 2013 but this winter the power steering assist has started changing its feel from day to day. When I first noticed it, the truck started loosing it's positive feel down the road and I had to do more correcting of the wheel to maintain a straight line. This varied from day to day, sometimes better, sometimes worse. Then when the temps drop below -20C the steering gets real firm and does not loosen with driving. If the temps increase during the day, the steering feels a little better when I fire the truck up later in the day. Overall the steering assist has become heavier and I have lost the easy light effort the truck once had with cold days being worst. The on-centre feel has become rubbery and I feel like I'm always fighting the wheel to keep a straight line. I've taken the truck in for service twice regarding this but my dealer says that they can't find a fault, no codes and mechanically everything checks out. When I've gone to the car wash and sprayed the underbody and done an engine wash, the steering becomes miraculously light and precise when I leave. The next morning we're back to heavy effort. From my research on the net, I'm worried that the whole rack assembly may be at fault, but if I can't convince the dealer I may be screwed once my bumper to bumper warranty is up later this year. Anyone else have similar issues?