Question about 1994 Chevrolet S-10 Blazer

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Smoke coming from vents on 2002 chevy s-10

Heavy to light smoke from vents, burls out thick and visable with fan turned off, dont see it as much with fan on but still there. does it on any vent setting also with heat all up or down. does not seem to produce smoke with engine off. smells like fan motor burning up to me but if it is wouldn't it smoke with engine off too?
recently did catylac converter and muffler upgrade with all pre-fab parts. checked and seems leak free. obviously is suspect to the cause of the problem but i'm not sure of what the problem might be.

Thanks

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The original GM design has a fair amount of thermal blanket material on the lower surface of the heater case, in the engine compartment to protect the plastic from the exhaust components. Check to see if this material is still in place after you had done the exhaust system upgrade.

Posted on Feb 24, 2009

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