Hopefully I didn't miss this being posted already, if so, I'm sorry.
I have a 2004 Tahoe, 2WD, 4.8L, 4L60E.
Transmission went out, I have a 1999 Silverado 5.3L, 4L60E 4x4 with transfer case.
The only thing I noticed different besides having the transfer case and extra plugs on the 99...