I have a friend that has a 2000 GMC Sierra Z71 1/2 ton,5.3 4x4. He wants to put new tires and wheels on.
275/55/20 I told him he has to reprogram the computer,But doesn`t believe me. Am I right or wrong? If I`m right,what would it effect,or what problems might occur? Mechanical or electronic,not clearance.Thanks, Bill