Hello GM Nation!
This is my first post here and I did search before posting for my issue. I could not find anyone here or on google with exact symptoms.
Little back ground info, I am an ASE certified tech with 5+ years experience on cars and diesels.
The issue I am having is with the key off and out of the truck on this 2007 envoy you can turn the blower motor to all speeds and off completely. It has MANUAL hvac control. I have seen the TSB for the automatic hvac to replace the LPM (or blower motor resistor). But even with this being an manual control I tested and replaced with no luck. Before I get into this anymore do these manual control units go bad? or is it something in the harness back feeding power to the blower motor and controls. With the key out of the truck the blower can be turned to any speed and is the only thing that works with the key out of the truck.
Thanks and I hope we can figure this out!
PS I am also a Ford guy.......
This is my first post here and I did search before posting for my issue. I could not find anyone here or on google with exact symptoms.
Little back ground info, I am an ASE certified tech with 5+ years experience on cars and diesels.
The issue I am having is with the key off and out of the truck on this 2007 envoy you can turn the blower motor to all speeds and off completely. It has MANUAL hvac control. I have seen the TSB for the automatic hvac to replace the LPM (or blower motor resistor). But even with this being an manual control I tested and replaced with no luck. Before I get into this anymore do these manual control units go bad? or is it something in the harness back feeding power to the blower motor and controls. With the key out of the truck the blower can be turned to any speed and is the only thing that works with the key out of the truck.
Thanks and I hope we can figure this out!
PS I am also a Ford guy.......