I am trying to repair a leaky faucet in my bathroom sink. I have removed the cap on the handle, removed the screw and pulled off the handle. I am unable to remove the stem. Does anyone have any suggestions? This is a Sayco faucet and could be 20 years old.
Thank you.

I am trying to repair a leaky faucet in my bathroom sink. I have removed the cap on the handle, removed the screw and pulled off the handle. I am unable to remove the stem. Does anyone have any suggestions? This is a Sayco faucet and could be 20 years old.
Thank you.
There's a large brass nut on the stem. This is the bonnet packing nut. Unscrew it and turn the stem assembly out counterclockwise. Good luck, Tom

I am trying to repair a leaky faucet in my bathroom sink. I have removed the cap on the handle, removed the screw and pulled off the handle. I am unable to remove the stem. Does anyone have any suggestions? This is a Sayco faucet and could be 20 years old.
Thank you.
Any suggestions on unscrewing the bonnet packing nut? I've tried pliers, crescent wrench and a channel lock.

And we are all 100% sure that you shut off the main, right? Before doing the work Tom recommends you might try just tightening that nut. If it is a packing problem this could be the fix. If not, Tom's recommendation should be followed. He can then tell you what washer and/or seat to replace.

Give it a shot of penetrating oil and a few raps with a hammer. Then put a 6 point socket on it, a deep well one likely.