Hi, I am working on a 70 Chevy truck with a 2008 5.3l from a 2008 Chevy Tahoe (V8) with an aftermarket harness. After reading the ECM and opening the file there is no VATS menu in the System General file. There is only Starter Diag and Clutch interlock tabs, and the the Alternator section. Am I blind? I found the DOD section and Rear O2 sensor sections I was looking for. I also read a thread on 2007 Silverado's not being supported. I have VCM Suite 2.23.474 BETA. Is a 2008 Tahoe supported by HP Tuner? Mike