1997 Oldsmobile Silhouette Q&A

1997 Oldsmobile Silhouette Question: always low on coolant,no leaks,new pressure oil switch replaced, no heat

thermo signal runs high after 5-10 mins then goes to zero. new thermostat placed last year. Blows cold air still after 1/2 hr(unless on highway),fans dont blow well except rear blowers -
Answer 1
ck coolant level or poss thermostat is sticking open -