Required first post...so I'll describe my project.

2000 K2500 (GMT400) crew cab, 5.7 Vortec, 4L80e, 90k miles (original)

Just finished my 411 swap and added cooling fans from a 2005 silverado with a stipped down factory fan harness.

Tune segments include 2001 Xvan engine, and 2001 Silverado K2500 trans and system segments (to get the 4Lo shift to work correctly.

Trying to decide where to go from here.

Thanks for all who contribute here, alot of the information that I needed to complete the project was read from this forum.