I have an old gm delco conditionair forced air furnace. All my voltages are good and I have replaced the thermocouple. I still can't get the pilot light to stay lit. can I still get replacement parts( gas valve 0 for this unit. Thanks

Do you have two wires that plug in under the thermocouple. If so you may have a limit switch blown. You can get a standing pilot gas valve from any hvac company-- over the counter.(no special license needed)