I have a 2002 Silverado 2500HD 4x4 6.0L RPO Codes: GT5 & G80 Last 8 of VIN: 2E102085 I'm trying to ensure I order the right parts so I need to know if I have 9.5, 10.5, or 11.5? I'm hoping for some identification tips without taking the differential apart ahead of time as this is the daily driver so it would be a weekend thing. I've rebuilt several rear axle assemblies of Fords and larger trucks with no problems but I'm not as familiar with Chevrolet. Anything like bolt counts, flanges, identifying features unique to the size, or if you just know the answer. Thanks for any assistance you can provide, it's really appreciated.