Reply to thread

Message: <blockquote data-quote="jasonLmarsh" data-source="post: 28351" data-attributes="member: 15232"><p>Just picked up a nice 2005 Z71 Suburban and having a strange issue with the HVAC.  The issue is that the AC blows ICE COLD from all the vents all the way up to about 90, where it switches to full hot.  The fan speed starts decreasing around 80 degrees on the hvac, but it's still blowing ice cold air.  At around 90 it will switch to full hot.  I'm thinking this might be one of the blend door actuators, but not sure which one since all the vents across the dash are in sync with each other.  I did replace the fan/sensor module in the headliner with a GM part since the old was was buzzing.  Is there another sensor I should change? or could this be a blend door actuator?</p></blockquote><p></p>