97 Power steering leak

I recently replaced my badly leaking original 1997 Tahoe GM PS pump with a remanufactured Cardi pump. I removed the high pressure speed assist fitting from the original pump and installed that on the reman pump; torqued as per instructed with the included new O-ring. Now my 97 tahoe is leaking from this speed assisted high pressure fitting on the power steering pump.
Is there a rebuild kit for this speed assist fitting(has a couple different size "o" rings inside); or is there a replacement fitting from Chevy.
Thanks for any help
Tony

I recently replaced my badly leaking original 1997 Tahoe GM PS pump with a remanufactured Cardi pump. I removed the high pressure speed assist fitting from the original pump and installed that on the reman pump; torqued as per instructed with the included new O-ring. Now my 97 tahoe is leaking from this speed assisted high pressure fitting on the power steering pump.
Is there a rebuild kit for this speed assist fitting(has a couple different size "o" rings inside); or is there a replacement fitting from Chevy.
Thanks for any help
Tony

do it again with another pump