heater blows cold air when turned on.
Chevrolet Q&AAsk Your Question
1991 Chevrolet G Series Van (G20) Question: no heat
Answer #1Visitor, October 13, 2010, 20:28
themostat stuck open or heater core plug
Answer #2Visitor, January 25, 2011, 13:40
could be heater control valve located just in front of heater core
Answer #3payitforward May 06, 2014, 11:21Rookie
I noticed mine blowing coldish on the feet only this winter when I took it for a trip.