1991 gmc sierra overheats and cold air blowng

Asked by Jennifer Jan 20, 2019 at 08:58 PM about the 1991 GMC Sierra 1500

Question type: Maintenance & Repair

My 91 gmc sierra is overheating and blowing cold air. Its 9
degrees here and my overflow is frozen.HELP PLEASE

3 Answers
415

Crew_Chief answered 5 years ago

Radiator coolant is probably frozen. I would let it idle for a few minutes to let the overflow bottle thaw out. Then check the coolant level.

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42,920

Hornet_2497 answered 5 years ago

That's correct. And since your coolant is freezing at 9 degrees, you better add pure, undiluted, unmixed coolant until the concentration brings your freezing point down to -35 degrees F.

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30

heath31689 answered 5 years ago

check your antifreeze fluid make sure it's full I've seen some strange things with cooling systems

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