Good luck getting any help from a GM dealer when it comes to hard steering!!!I bought over sized tires from the dealer and installed them on a new 2003 D/A. It was winter so on snow they were great but spring did come and I could`nt turn the steering wheel on dry pavement. I turned the tires back to the dealer at a loss. They resold them to another D/A truck owner and tell me he has no problem.They did`nt offer to check power steering pump because they know the pumps are minimun requirement for stock tire size.Does the snow-plow option include a more powerful pump???