post pics andsay what the advantages/disadvantages are. my dad just bought a 03 K3500 standard cab, SB. it has 118,000mi on the 6.6 and allison. it was hesitating really bad but we changed the filters and it runs great now. we are wanting to get some 19.5s because of there resistance to puncture. as we will be hauling heavy loads and in areas that cleanup is being done. i dont really know what rims are out there that look good so post the pics of your truck with them if you have them.