1999 Chevy Lumina running hot & cold

1999 CHEVROLET LUMINA
Avatar
JJACBAH
  • MEMBER
  • 1 POST
Engine Cooling problem
1999 Chevy Lumina 4 cyl Front Wheel Drive Automatic

when stopping or decelerating at all causes the temperature guage to swing way up, the heater starts to blow cold air instead of warm air. After my speed levels off the temperature guage drops back to normal and the heater blows warm air again. What might be causing this problem?
Jan 11, 2010 at 1:13 PM
Advertisement
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.