Ok somtime in the past I have done 2 04 trucks. One was an 04 GMC Sierra 5.3 and the other was a 04 Chevy Silverado 4.8 I have an Apt this saturday for another 04 Silverado 6.0 and was just going to get the Year/Modle license. Well when I look at my upgrade credits it says I need 5 for the GMC and 5 for the Chevy, When really if 75% goes towards upgrade credits it should be more like 3, or is it 4? Either way GMC Siverado/Seirra are grouped together or at least they are with all the other Modle/Year licenses I own? I downloaded a file from the repository to check and sure enough it said I needed 5 credits for the modle/years license?