Pontiac Repair: 1993 grand prix heater, coolant level, hvac control

Question
my 1993 GP heater blows on all speeds but will not get hot.What could be my pblm.

Answer
first thing to check is the coolant level, if its low you will have no heat. also an open thermostat will cause a no heat condition. another possability is a faulty HVAC control assembly (temp control on the dash) or a faulty temperature control motor including the associated circutry. im betting that it most likely is a t-stat or low coolant issue.