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  1. #1

    Default Where is the drain on a 99 ac setup.

    Hi, I am getting water in the heater motor and carpet after a rain. I am looking for the drain for the cowl as I am sure it is leaking into the duct work and getting to the heater motor. I have looked for the drain and can't locate it. This is on a 99 crew cab pickup.

  2. #2


    Pour a bucket of water in there and look for the drain. It's under the tunnel. If it's plugged up the cowl will fill up with water. If it's clear you will see the water coming out the drain.

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows

    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  3. #3
    Legend unplugged's Avatar
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    Sep 2006
    High Deserts of SoCal


    Mine is behind the windshield washer reservoir. It looks like an angled sparkplug boot sticking out of the firewall on the passenger side.
    There is no way to happiness....happiness is the way.:yipi:  _vXMYypuKMJFw671uF2ZPhjez_j-atRmcjM2zQKpQi1JSsB75/burb1.JPG
    High Desert SoCal
    93 K1500 burb (personal) 350 AT 3" Lift 250K+
    02 Honda Civic LX
    Looking for a 1990's Miata for an engine swap

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