I change the thermostat and water pump on my 2005 grand prix and the gaue is still staying its run hot what should I do next?


Asked by Jul 05, 2014 at 02:27 PM about the Pontiac Grand Prix

Question type: Maintenance & Repair

9 Answers


Did you bleed all the air out of the cooling system? Does it only run hot while at an idle but cool down as you drive at highway speeds?


The gaue raise to high when drive it the air was bleed out the cooling system I was going to replace the radiator

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When you first start the car does the gauge start at cold and slowly rise to hot or does it jump straight to hot? Are you sure it's actually getting as hot as it says it is?

1 of 1 people found this helpful.

When I stared the gaue stared off at cool then raise to the high gaue

1 of 1 people found this helpful.

It stared at cool then slowly rise to hot


Ok sounds like gauge is operating properly. Double check that all air is out of the system and that the system is full. Also inspect top and bottom radiator hoses. Does one of them look kinked or sucked flat?


Have you ever added anything like stop leak to your coolant? (Fix in a can). If no then I feel 2005 car to new to have to have radiator replaced. Was thermostat installed correctly?


I will look at the hose again .Not sure if the thermostat was installed will check that again


If all that checks out you might just have a head gasket issue. These cars are known for blowing head gaskets.

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