Steering problems on 2009 Hummer H2

[ken.j]

My wife tolds me that the steering was really stiff when parking her truck recently and that she had to really yard on it.
I had fitted a set of American Eagle 064 Alloys with 325/65/18 Toyo Open Country All terrains when we purchased the vehicle and it had always driven better than stock.
When I tried it from parking position, it was as if the steering had locked up i.e. no power although once you pulled hard it came through and no problems when moving at speed.
I took it to my local GM dealer ( who service but are not authorised to carry out warranty repairs on the Hummer range) to lube the front end and the technician said although he could find nothing obvious and lubed the front end, felt that it didn't feel right and that I should take it to the Hummer dealership as it is still covered under warranty.
He also mentioned that while he did not believe that the larger tires were responsible for this symptom, that I should put back on the stock wheels and tires as e.g. if the steering was found to be worn/faulty that the Hummer dealership may try to blame the wheels and not warranty repairs.
The truck has only 5000 yes 5000 miles on it.
I run my own F350 and Raptor with 37's and have never had any issues.
Any thoughts of any experience of this would be mush appreciated.


Ken