December 17, 2010I have a 1998 silverado 4x4 with the Z71 package. The truck has 171,000, with the original Automatic transmission. I don`t know if the fluid has ever been changed or how often, but the fluid is still red like new fluid. The truck has a towing package on it so i assume it has been used for towing before but not sure. Do you think it is safe to change the fluid or not?
It also has seemed to act a little rough changing to second.