I purchased it not long after I bought the donor car (VZ SS Ute - front sump pan) in 2008. If I recall correctly it is a C5. I got it from the US but I understand they were subsequently fitted to the 6.0ltr vehicles sold here but I can't confirm that.
(edit) Zedn is correct it is a C6 - I found the details on an old e-mail.
C6 LS2
oil pan (has shallow rear sump) (kit with bolts/gasket) = 12581810
C6 LS2
oil pick-up screen (same used on LS6) = 12558750
C6 LS2
oil deflector (same as used on LS6/LS1) = 12558189
C6 LS2 dipstick = 12570788
C6 LS2 dipstick tube = 12570787
Don't get the dipstick and tube - better to go with an after-market.