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Thread: 98 Chevy heater controls location.

  1. #11
    Join Date
    May 2004
    Posts
    2,120
    I've seen some people pull the blower motor out when they mess with the positioner eventhough it doesn't need to come out. If you pull it vacuum out the inlet hole directly to the left to get more air flow. I should have give more detail.


    97 GMC, 2002 LS6.

    1991 GMC Syclone #1428

  2. #12
    Join Date
    Sep 2008
    Location
    California
    Posts
    60
    No, I didn't pull the blower motor. But thanks for the tip incase I ever do need to pull it out.

    The only problem I had with fixing this was getting my hand in the hole to position the flapper. My hand has a nice bruse on the back of it now! I guess I should have had my wife help at that point.
    1998 Silverado Z-71 Ext Cab. 5.7L Descreened MAF, K&N direct replacment, 32x11.5 R15 AT's,Posi rear end, True duel w/Magnaflows, Sub woofer setup, Remote starter.

  3. #13
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    The power wire to the blower is purple.

    These trucks typically break the plastic on the bottom of the case that prevents foreign objects from entering the motor. If you throw lots of wrappers and trash in the passenger floor, the stuff gets sucked into the motor and causes it to make lots of noise without much airflow.

  4. #14
    Join Date
    May 2004
    Posts
    2,120
    Quote Originally Posted by GasGuzzler View Post
    The power wire to the blower is purple.
    Agreed, it's just a spade connector but there's a connector with a black and red wire (I believe) that get's hot and melts. If you unplug it I'm pretty sure the blower will quit but I can't remember without looking. I know it goes through the firewall If you have to pull the harness.


    97 GMC, 2002 LS6.

    1991 GMC Syclone #1428

  5. #15
    Join Date
    Sep 2008
    Location
    California
    Posts
    60
    Now here is the issue. That d@mn air valve came off again. Now it is just flopping around in the housing.

    I was wondering if there is a clip that holds it in place or if it is sapposed to just sit there in the opposing hole?

    If not where does the clip go? Near the arm, or on the opposite side?

    This REALLY pissed me off this morning!
    1998 Silverado Z-71 Ext Cab. 5.7L Descreened MAF, K&N direct replacment, 32x11.5 R15 AT's,Posi rear end, True duel w/Magnaflows, Sub woofer setup, Remote starter.

  6. #16
    Join Date
    Sep 2008
    Location
    California
    Posts
    60
    I finally fixed the problem, I built a little arm out of plastic to keep the control arm from being able to back out. Just screwed it into the side of the airbox.

    So this is done.
    1998 Silverado Z-71 Ext Cab. 5.7L Descreened MAF, K&N direct replacment, 32x11.5 R15 AT's,Posi rear end, True duel w/Magnaflows, Sub woofer setup, Remote starter.

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