Question about 1999 GMC Safari

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Tempeature goes up and blows cold air - 1999 GMC Safari

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Various problems can cause this to happen, the most common is Low Coolant level. Use a 50/50 mixture of antifreeze and water to top off the fluid level.

If that above does not remedy your situation, I would check/replace your thermostat to ensure it is in working order. A malfunctioning thermostat will either stay open or not open at all. If it sticks open, you will have a very hard time to get the engine to heat up. If it is stuck closed, you will overheat for lack of circulation of the coolant.

Posted on Feb 02, 2010

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