Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
if you swap the front tires to the rear will it still do this ?
and are the tie rods and idler arm tight in the front end ?
ok if swapping the tires does not help at all and the tire pressures are set to spec and there is no abnormal steering or suspension movement at all this sounds like a steering stability issue which on these trucks they need to be sure the idler arm is in the middle of the slots where it bolts to the frame the idler arm bolts are on slotted holes and if all the way up or down those slots will cause this kind of issue
if the idler arm is centered in the slots then the only thing to cause a steering stability issue and is very common on these trucks would be the caster out of spec which caster will NOT effect any tire wear at all caster is just for steering stability and when it is well below spec it will effect steering stability like this which a front end alignment of caster and camber and toe must be set to specs
again they MUST adjust caster and camber along with toe
some shops just align toe so be sure the caster and camber are set to specs
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