GM AC compressor identification and reseal?

[sixto]

'97 Suburban 6.5 turbodiesel - AC system has leaks so it was charged with dye. Months later dye is collecting on the case of the compressor -



The clutch and tail ends and hose fittings show no dye.

Questions:

1) What compressor is this? It has an OE looking Delphi label and an uneducated internet search suggests it's an H6 compressor rather than a Sanden.

2) Where could it be leaking from? Although there's a step in the case casting, I don't see information on separating the forward and aft sections of the case.

3) Is it worth resealing the compressor or is $200-250 for a rebuilt compressor money well spent?

Thanks,
Sixto
87 300D