Question about GMC Cars & Trucks
There is no heat in my 97 GMC Yukon. The climate controller works fine, the driver side actuator (mode actuator?) and the actuator on the lower, passenger side, attached to the blower motor (blend door actuator?) works fine as I just replaced that and the heat still doesn't work. I am thinking I replaced the wrong one and that it is the third actuator that is causing the no heat. Wondering where the third actuator is located. From my understanding it is on the upper, passenger side somewhere. I have the dash apart already. Unfortunately I read that this is the hardest one to get to. Any help would be greatly appreciated.
If one side still blows cold and the drivers side blows hot, you need to replace the actuator that is for the drivers side.
On the passenger side, under the dash there is a black plastic housing that goes from the pass door to behind the center console. Remove this black cover. There are 3-5 screws at the bottom. The panel pulls out. Once removed you see the vent control, actuator located upside down under the unit. The right hand side center console wall stops right before touching it. It uses 2-3 screws.
REMEMBER DO NOT connect power until installed or teeth will grind.
Just an FYI: I'm not affiliated w/ Rockauto I just buy a lot of parts and they have great customer service, show all competing prices, provide choices from, best, or brand name to low quality. PEACE
Here's a youtube video for passenger side
This is for Blend Door
Posted on Nov 27, 2013
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Posted on Jan 02, 2017
I have had this problem. I am not a mechanic...so to correct the issue temporarily, I simply turn off the car and restart. This has worked everytime for me. In extreme cases, I think you can also remove the AC fuse and start the car, which will also reset the computer. I also think that by taking the climate control off the "AUTO" setting has worked in the past.
Posted on Oct 27, 2009
SOURCE: Started with cold air on
Hello and welcome to FixYa!
It's really tricky. I suggest that you have a pcm or bcm swap if you happen to know someone who has one. Looks like that the wirings are good but the thing that controls the electricals is tripping. A bcm (body control module) or pcm (power train control module) swap will help you identify the fault.
Hope this helps and thank you for using FixYa! Have a good one!
Posted on Jun 27, 2011
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