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International Automotive Technicians Network
Re: 14 sierra blower inop
Posted to Technical Discussion Forum on 2/18/2020

The HVAC controls tells the HVAC module and the display what one is trying to do. Then the HVAC module will tell the blower what it is suppose to do It seems strange that you don't have codes in modules. Trust your scan tool? Vehicle wide DTC scan? One could p... Login to read more.