Temperature gauge not working
 

Hi im in the East coast i own a 1996 C4 LT1 recently i did a major tuneup on it plugs wires opti-spark distributor and also flushed the cooling system replacing knock sensors thermostat temperature sensor all new hoses and dex-cool antifreeze now my temperature gauge wont work help please?? P.S.
i also bleed the Cooling system