Have a 1998 s10 replaced the clutch and pressure plate 2 months ago and slave cylinder 6 mo ago now all of a sudden no pressure bled it 3 times still won't engage clutch to get it in gear , could it be the reservoir seal bad no pushing fluid to slave cylinder?

The clutch master cylinder could be bad or you have air in the system, which can stubbornly pool in elboes. First, see if you can get your hands on a power bleeder and bleed the system again. Clutch master cylinders tend to fail if they are overfilled--never fill above the MAX Line. I change the brake fluid in my 1993 Civic's hydraulic clutch every 2 years, to replace the lubricity of the fluid, prevent corrosion, and purge moisture. I've never had to replace any part of the system, yet.