1999 Chevy Lumina running hot & cold

1999 CHEVROLET LUMINA
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JJACBAH
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  • 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
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PEAR69
  • ✓ASE Certified Mechanic
  • 1,482 POSTS
  • ASE Certified Mechanic
When the engine is cold, remove the radiator cap and see if the coolant is low.
Jan 12, 2010 at 12:57 AM
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