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Silverado & Fullsize Pick-ups The Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900
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  #1  
Old 03-30-2011, 07:22 PM
CF Beginner
 
Join Date: Mar 2011
Posts: 3
Default 91 Chevrolet truck heat control Help??

I have a 91 Chevrolet 2500 Silverado Truck. My problem is....my Air blows only on the Floor mode, no matter what "Try" to turn it to? It blows air, heats fine.....Blows out Very warm or cold air (High or Low) Its just stuck on The floor....it won't swithch to vent or Defrost. Can someone please Help with problem?? Thanks
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Old 03-31-2011, 08:21 AM
tinbender59's Avatar
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Join Date: Jul 2010
Posts: 184
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look at the heater box beside your left foot (as you set in the drivers seat) there are 2 boxes or modules one low and one hi. watch these and move the settings on HVAC controls. watch for movement and noise from them. there is also linkages on both, they need to be checked. I have a gallon can of modules, I'll let you have one or two for shipping. if nothing happens it is more than likely you're controller, and I do not have one of those.
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Old 03-31-2011, 11:13 AM
Rob G's Avatar
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1990 Chevrolet Silverado 2500
 
Join Date: Mar 2011
Location: Tacoma
Posts: 35
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My controller cable broke and was stuck on the vents. Took it to the mechanic, they switched the flaps to defrost mode for me as this was the most important need. (frost every morning)

I did't have the extra money for the repairs as my extisting repair bill wa $1200 already

going five years this way and I am ok with it.
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Old 04-01-2011, 06:46 AM
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Join Date: Mar 2011
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Default Thanks!!

Yea......I ash around at the dealership the other day and was told to look there!! The actuators work....looks like the bracket that holds the actuator broke and in turn it broke the end on the flap.....as it was cocked up and put it in a bind!!
Does anyone know how hard it is to change that flap? Looks like the dash will have to come off?? Or maybe a way to fix this??
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Old 04-01-2011, 06:50 AM
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I was able to swithch from floor to defrost mode bye flipping the flap bye hand......once I took the actuactor off!!
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Old 04-01-2011, 11:46 AM
Rob G's Avatar
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1990 Chevrolet Silverado 2500
 
Join Date: Mar 2011
Location: Tacoma
Posts: 35
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For my truck...the cable cost $125.00 and the labor was about $100 more. Yes they will have to take off the dash..time consuming!
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Old 04-01-2011, 11:46 AM
 
 
 
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2500, 91, air, blows, chevrolet, chevy, dual, floor, heat, shut, silverado, stuck, temperature, truck, week


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