Auto trans Check fluid on C-5

On the drivers side of the transmission there is a plug clearly
labeled FILL on the casting beside it, fluid is to be level with the
bottom of that hole. Be aware that some of those plugs had a
temperature wire connection to it depending on what options your C5
has. Male hex if there is a wire, female if not. Toque to 20 FT/LB.

Drain plug is further back and lower but is also clearly marked DRAIN.

While you're under there check the spring plate bolts, I think they
are 15 M/M, some have come loose on the C5.

Well speaking of a dumb butt, I just noticed that you wanted
information for the automatic.

Some still applies except the transmission has to be hot and run
through the gears before you remove the drain plug on the side of the
pan with the engine running. Drain plug means there can be hot fluid
exit when you remove the plug. CAREFUL! Fluid should be level with the
bottom of the plug hole.

Why they call it a drain plug I have no idea because the next
paragraph it says "To drain the transmission remove the pan."

Sorry for the confusion on my part, good luck.