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My 2006 Grand Prix GT is overheating and I 't know where to…

Customer Question
My 2006 Grand Prix...

My 2006 Grand Prix GT is overheating and I don't know where to start.

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

It has coolant. the heating core is bad but i'm not using the heater. It over heats at an idle but not when Its moving.

Submitted: 2 years ago.Category: Pontiac
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Answered in 29 minutes by:
1/23/2016
Pontiac Mechanic: john aka eaut, The Car Guy replied 2 years ago
john aka eaut
john aka eaut, The Car Guy
Category: Pontiac
Satisfied Customers: 17,484
Experience: 15 years as a auto tech
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are the fans working?

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Customer reply replied 2 years ago
yeah they are working. coolant levels seem good too.
Pontiac Mechanic: john aka eaut, The Car Guy replied 2 years ago

what motor 3.4 or 3.8?

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Customer reply replied 2 years ago
3.8 liter
Pontiac Mechanic: john aka eaut, The Car Guy replied 2 years ago

is the heater core leaking? have you checked the thermostat

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Customer reply replied 2 years ago
The heater core is leaking but I'm not using the heat at all. I have not checked the thermostat
.
Pontiac Mechanic: john aka eaut, The Car Guy replied 2 years ago

I would start by replacing the thermostat...if the heater core is leaking it really needs to be replaced...start with the thermostat..and have it checked for head and intake leaks

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