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 How To: Blower motor resistor replacement GMT400
Old77
 Posted: Mar 14 2015, 07:17 PM
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This is for the late model gmt400 trucks. May also work for the 88-94 but not 100% sure if they are configured the same but could be http://www.freesmileys.org/smileys/smiley-confused005.gif

This is to fix the issue of the HVAC controls only working on select fan speeds (if at all). So let's get to the steps and the pics.

1. Clean out glovebox
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2. Remove glove box
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3. Locate the resistor on top near the back.

4. Use a flat blade screwdriver to GENTLY get the connection disconnected from the old resistor
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5. There are two 7mm screws holding the resistor down. Unscrew those. It also helps to swing that relay out of the way that's on the left

6. Work out the old resistor then reverse the process. It's not hard but does take some patience
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Old vs new
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This post has been edited by Old77: Mar 14 2015, 07:37 PM


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NORTHPORTTROLLER: the only forum on the web where the owner will troll his own site user posted image
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NorthportTroller
 Posted: Mar 14 2015, 07:24 PM
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Great write up buddy. http://www.freesmileys.org/smileys/smiley-chores017.gif


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Brownie
 Posted: Mar 14 2015, 07:28 PM
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http://i1220.photobucket.com/albums/dd448/NorthportTroller/Smileys%204/congrats.gif nice work, I hate dash board work http://i1220.photobucket.com/albums/dd448/NorthportTroller/suicide_zps93df9b6b.gif http://i1220.photobucket.com/albums/dd448/NorthportTroller/Smileys/laugh.gif


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Old77
 Posted: Mar 14 2015, 07:38 PM
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It's even worse when you have sausage fingers http://i1220.photobucket.com/albums/dd448/NorthportTroller/Smileys/laugh.gif


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Brownie
 Posted: Mar 14 2015, 07:59 PM
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i always break them stupid clips and can never get all the screws back in http://i1220.photobucket.com/albums/dd448/NorthportTroller/Smileys/laugh.gif


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