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my 1998 gmc jimmy has no floor heat but i have defrost and ven heat

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Q: '2000 gmc jimmy no floor heat but has defrost and vent heat'?
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2000 gmc jimmy no floor heat but has defrost and vent heat.?

from what i am hearing a lot of is that it is either the accuator on the driver side to the right of the gas pedal or the baffle door itself is broken(costing a sh*t ton of money to fix have to remove the dash). there is a while plastic piece that has a tendency to break on the end of the accuator that goes into the box. some ppl use a bent coat hanger to push the baffle through the driver side floor vent to get it to move so you get floor heat, then disconnect the red and blue vaccume hoses off the accuator to prevent the baffle from moving. use a nail or tape to stop the vaccume leak . you should still have all you functions for the rest of your heat controls. just the floor and defroster wont switch back and forth. they will both work at the same time. this is the case for each the blazer, jimmy, sonoma, s10, zr2 1998 and up. if you still have your heat working on the floor id suggest that if you own one of these vehicals that you don't turn your defrosters onto full fefrost mode. just floor defrost. what happens is the accuator by the gas pedal when placed in full defrost mode places to much force on the white plastic piece and snaps it, or the piece that's just inside the box. if you put into floor / defrost mode the accuator works as intended.. its mostly a design flaw from gmc that was never made public. it was a volintary recall item


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