Is my thermostat stuck open

[sleonard13]

I have a 91 c-1500,,,,Its about 60 here in Indiana over the last couple days...When i first start my truck when the engine is cold will the top radiater hose be hard or should it remain cool and soft until the thermostat is open..My temp guage after 20 min at a idle about 1400 rpm is only i would say 120 and i have not seen it rise..The thermostat in it is a 195 degree one... so the engine should warm up quicker I think...I do get heat after about 10 min. Its warm not real hot...Please let me know..What is the operating temp of a 91 chevy truck.