rrubel;
This part was on my '88 C4 with only 22K miles on the car. I had clutch problems and replaced the slave (in question) which I thought was leaking. It wasn't, it was the master cylinder! Anyway, I bought a repair kit which basicly was only the internal flexable seal and a snap ring and rebuilt it. Since it came off a car with only 22K miles ,I expect it would be a genuine GM part. Yours if you want it.
Can you send payment using Paypal? Otherwise I'm open to your sugestion re payment method. Don't know about the shipping cost. Would guess maybe $10. If more I'll pay it, If less, I'll include a rebate with the shipment.
BTW if you'r not up to speed on replacing one of these things...You realy have to bleed them BRFORE you mount to the car. GM put the bleed valve on the wrong end.