Question about 1991 Chevrolet C/K 2500

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Smoke coming in the vents when heater is turned on

When I turn the heat on smoke comes thru the vents. It fogs up the windshield and smells horrible. Do you think its the heater core. And how do you change it. 1991 Chevy GMC Conversion van

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  • Anonymous Mar 18, 2014

    Antifreeze smell and smoke coming out of vents Silverdo 1999

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2 Answers

A good friend of mine taught me his trick , Take a jigsaw and saw off the top of the box mounted on the firewall then yank it out and replace it use black duct tape to replace the part you cut out, Screw the dashboard routene, All you need is heat the core costs 40.00

Posted on Oct 28, 2008

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  • 293 Answers

Sounds like heater core you will have to pull dash up and remove heater assembly to replace heater core it is a big job not for the faint of heart good luck

Posted on Oct 05, 2008

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