Question about 1998 Chevrolet S-10 Pickup

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1984 s10 pick up a/c blow from bottom or top not vent?

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  1. air diverter vaccum operated
  2. vaccumm mode switch is in control head
  3. remove screw under front edge of control console
  4. gently pull forward to access vaccumm lines
  5. mode switch is inexpensive $10.00
  6. mode switch routes vaccumm to vac motors that work mode, blend , recirc ,defrost doors.
  7. vaccumm mtrs are cheap but hard to change

Posted on Jul 27, 2010


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1 Answer

Heat blows out of top vents but bottom vents blowing cold air. What should I do?

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Why is it when i drive my 1988 s10 pick up it blows warm air from the lower middle vent?it only does it when i drive it a long distance.

The vents for defrost, face and feet are all controled by vacuum. If there was no vacuum then defrost would be the default position. If it begins to blow at your feet and the lever was not set to it then I would check the connection at the back of the lever.
There is a dial where all the small vacuum hoses are that rotates when you move the lever. I have seen this dial come loose and allow vacuum to leak or there is a pin on it that will break. If its broke and caught in between settings that may be what causes the air to blow at your feet.

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Mar 22, 2010 | 1984 Chevrolet S-10

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I have a 1998 s10 and the heater switch will only work on dash ve

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Oct 09, 2009 | 1998 Chevrolet S-10 Pickup

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i have the same problem on my 84 grand prix..ther is black wire that heat runs through i broke my cause it was so old an dry rotted an the heat stoped coming out the vents but comes through the dash by the winshield

May 14, 2009 | 1984 Pontiac Grand Prix

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Heater blows cold air from top vents after running for 1.3 hours

Sounds like you may be able to fix it by flushing your antifreeze and back flushing the heater core. Some car owners cheep out and put stop leak into the antifreeze, others dont change there antifreeze at all. Both are mistakes.

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1984 S10 wiper arms

No Problem! Look down on the Bottom of the Wiper Arm, wher it attaches and Swivels. There is a Small tab that comes off of the Upper Part of the Arm that looks like Two Front Teeth Sticking up just a Little. Take a Pair of Pliers and Pull this Tab Up Towards the Top of the Winshield to Release the Lock on the Arm. then take a Pair of Pliers with Tape on them so that you will not Scratch the Arm and Pull while you Wiggle the Arm right at the Swivel Pont and they will Come off. Please Rate my Response, I need all the Help That I can Get! Thanks!

Jan 28, 2009 | 1984 Chevrolet S-10

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