Question about 2001 GMC Yukon XL
Heater goes to full hot, no control, even when full cold (airconditioning mode) is selected hot air continues to flow. Usually after parking overnight system often starts operating normally, if started with cold selected. System will go to full hot again if temperature is selected to the start of the warm air (red arc)12 0 clock position or greater. Once the system goes into the full hot mode nothing seems to be able to switch it off.
WellI don't know a whole lot about cars but my 2001 Yukon was doing this exact thing and I took it to the shop and it was the accuator under the seat! It was fairly cheap and now it's working perfect, hope this helps..... oh it was $90.
Posted on Oct 08, 2009
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Posted on Jan 02, 2017
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