No offense but there has never been a 6.0 put into a Avalanche by GM. They are promising that one will be available mid year on the 2007 model but not yet.
Todate, Every 1500 AV ever built has a 5.3 with a 4L60 and every 2500 has a 8.1 with a 4L80 from the factory.
2011 Silverado LT 5.3 bone stock(for now)
(gone but not forgotten)02 Avalanche Z-71 Vortech supercharged 3.12 pulley 10psi, SMC meth injection, 33 12.50-17 procomp AT, 17x9 procomp wheels, AVIC-N2 NAV, 4.56 gears, Detroit TrueTrac, 2500 stall converter, transgo HD2 shift kit, Vette servos, 80mm BBK throttle body, Edelbrock shortie headers Cold Fusion wet shot (60hp), and too many more mods to list. 8.86/18th 472rwhp/499rwtq
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