2005 GMC ENVOY HVAC

2005 GMC ENVOY
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BKSTEV
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My max setting on my HVAC (level 5) does not work on my '05 Envoy. Speeds 1-4 work fine but on 5 it just turns off. Does anyone know what would cause this? I checked the fuses and they all seem fine. Someone mentioned to me to check the relay but I did not see a relay pertaining to either the HVAC or the blower motor in the manual. Any help with this would be appreciated.
Aug 17, 2007 at 7:28 AM
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SERVICE WRITER
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There is a technical service bullitin out for that. It entails replacing the blower motor resistor module AND it connector. #35 fuse ( in underhood box) needs to be pulled out first before changing. Resistor is in behind the right hush/closeout panel . (I'm not sure if that is the kick panel or under the glove box.)
Aug 17, 2007 at 7:58 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.