Question about 2005 Pontiac Grand Prix

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I have a 2005 grand prix, it has 85,000 miles on it and the auto shop said I need a new transmission. I watch the range on it and my trip miles, it takes 60 miles to go less than a mile. They said some hose was detached and it was fine for about 3 days after they fixed the hose. Now, my defroster does not work. My heat works but takes a long time to warm up, now it only works on the face and feet setting. Any ideas on what the problem could be?

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Are you having problems shifting? If not, your transmission if probably fine. You may have a faulty Vehicle Speed Sensor though.

As far as the heat problem, it may just be low on coolant. It may not overheat, but there is not enough to get up to the heater. Thermostat may be stuck open, or your heater core may be plugged. One of these may be the answer if it is a new problem, if it does it every year, it may not have a hot enough thermostat. Water level first thing, then thermostat. You can try covering 1/2 of the radiator with a piece of cardboard. This will cause the coolant to heat quicker, but be careful it doesn't get too hot. Also, your heater core could be going bad, but this is less likely, and more expensive to fix. Start by checking the coolant and topping it off. If the coolant is fine, get a new thermostat.

If the switch is only working on the face and feet setting, your Fan Switch may be going bad.

Posted on Mar 14, 2011


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