Question about 2003 GMC Sierra
If I turn heater on 90 I get hot air but if I turn it to 89 or lower it will only blow cold air
It could be pushed onto the wrong spline remove the knob turn the spindel back to zero with your hand and then replace it back on with the arrow to zero.joe
Posted on Nov 21, 2008
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Posted on Jan 02, 2017
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To troubleshoot this types of problem,click the link below
--------Go through the procedure to confirm the issue.
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This will help.Thanks.
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