On a 91 s10 with inline 4 cyl, will a bad slave cylinder cause the clutch not to work when cold but work fine once motor is hot?
But check the throw out bearings and pressure plate as well.
Looking for a Used S-10 in your area?
CarGurus has 1,456 nationwide S-10 listings starting at $1,495.
Search Chevrolet S-10 Questions
Chevrolet S-10 Experts