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· SilveradoSierra Guru
2004 Sierra 3500 6.0L, auto, extended cab, cab&chassis, upgraded to 4wd
3,744 Posts
swapping the transmission as well I hope (as I believe the 4.3 probably would have a 4l60e and the 6.0 would have a 4l80e). May want to consider swapping axles as well...
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