the pcv should be near the front valve cover
Where is the heater control valve on a 1994 Buick Regal
How to fix heater in Buick there is cool air ,fan is work .but no warm air
Could be a bad thermostat or heater core
Isn't a heater supposed to blow warm air?
possible leak in heater core.
Check the blower resister
look below heater hose
it's on the outside on the passenger side.near the heater core hoses.
Could be a bad thermostat or heater core
should be on the passenger side right along the fire wall
may be your heater control valve
Buick Regal was created in 1973.