Has this had the truck lifted? If it has the steering geometry is allscrewed up and will cause this. About the only cure is to get a kit that modifys the suspension to fix this. It straightens out the geometry so it won' t drift or get the "death wobble" that is so often associated with lifted trucks. Here are some suggestions other than what i've given for wander.
Wander ? Unevenly loaded or overloaded
vehicle.
? Ball joint(s).
? Loose,  worn or damaged front
wheel bearing(s).
? Loose,  worn or damaged
suspension component(s).
? Loose suspension fasteners.
? Steering components.
? Wheel alignment (excessive total
front toe out).
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Sunday, December 4th, 2011 AT 6:18 PM