Losing Coolant


pretty bad
Typical Repair Cost:
No data
Average Mileage:
158,500 miles
Total Complaints:
2 complaints

Most Common Solutions:

  1. not sure (2 reports)
2004 Pontiac Grand Prix cooling system problems

cooling system problem

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2004 Pontiac Grand Prix Owner Comments

problem #2

Oct 242011

Grand Prix 3.8L

  • Automatic transmission
  • 275,000 miles


There is a sloshing of water sound in the dash. Started a few weeks ago.

It was near the red zone tonight and the holding tank was empty. After cooling down the radiator itself was down a quart of fluid. Don't seem to be leaking anywhere.

The oil cap and dipstick still look like regular oil. Not the milky look when there is a bad head gasket. Not sure what is wrong. Plan to flush system and replace with new anti freeze.

- , Sandusky, MI, USA

problem #1

Jun 012010

Grand Prix GT 3.8L V6

  • Automatic transmission
  • 42,000 miles

I bought this car brand new with no problems until 2008 when my heat was not blowing hot. Had thermostat replaced. After 1 yr it did it again, had heater core flushed. After another year had the heater core replaced (nov 2010). In July 2010 I started to hear like water sloshing around, sounded like under the car or in the dash somewhere. In Nov 2010 mechanic said coolant was low, probably leaking somewhere. (No coolant on the floor of my garage). In Feb 2011 during a snow storm driving home I lost my heat and temperature started running hot, stopped at a service station and coolant was so low they added 3 gallons of Dexcool.

- , Streamwood, IL, USA

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