sebdos77

I Have the problem of ''grinding noise'' with my silverado 2014 1500 LTZ. Its similar to ''14SILVERADO5.3''. when i drive at 50 mph at constant speed , it make grinding noise every few minutes. It happen also at other speed (60 mph). It seem to happen in the same time that the truck switch from V8 to V4. so , i want to know how you resolve it. change all the transmission? or just the ''torque converter''? thank you