Immigration Site

My green card has been expired for a year, I already filed for a renewal I-90, I made an appointment to ask for a temporary stamp. Uscis said to get it stamped and that should be sufficient for employment eligibility purposes is this correct? Can they deny me an extension? Will they stamp my card?

USCIS will stamp your passport, not your expired card. The stamp on your passport will be enough for proving employment eligibility.
If you are clean (no criminal records), they wont deny your renewal application.

My green card has been expired for a year, I already filed for a renewal I-90, I made an appointment to ask for a temporary stamp. Uscis said to get it stamped and that should be sufficient for employment eligibility purposes is this correct? Can they deny me an extension? Will they stamp my card? How long have had your green card?

If you have a Social Security card without the employment restriction, for employment eligibility purposes you can combine that with a drivers license or state ID, without having to show the GC.

But to answer your question, yes the temporary I-551 stamped in your passport will be sufficient for employment purposes, as long as the stamp and the passport are unexpired.