03 BUICK - HEATER BLOWS COOL AIR also TEMPERATURE gauge will rise rapidly

Chaos

New member
when idling. These two things...? seem like they are connected from my VERY limited knowledge of autos. Obviously will have it check, bu any guesses as to what's wrong and an approximate "what's the $$ going to be --range?"
Thanks...Will post the diagnosis ASAP.
 
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