Hi everyone,
I have a 2004 Z71 Tahoe, 5.3L V8, untuned. It has lots of power, real quick, and no problem on the highway passing cars. I just bought a 2005 Z71 Tahoe, 5.3L V8. It doesn't have a passing gear, or at least it won't kick in. I spoke to the previous owner who said it wasn't...