Rear blower motor gremlins

[Douglas Friedberg]

Someone mention looking through the ac posts that wiring diagrams where posted somewhere for rear ac systems
Mine being 2006 Yukon XL SLT
my gremlin is the rear blower motor hot or cold works when it wants to. And when it does everything works as advertised when it doesn’t no blower motor at all in rear in any mode. went banging around no dice. Can some save me some time finding this or diagram.
For giggles and thoughts

245,000 miles on original fuel pump tubes rotted off and fuel leak also was evap error code had to cut out some of the main steel line and hose it.
Just finished rebearing G80 rear end and axle bearings. To bad someone gutted parking brake system. 5 diff leaks in o ring couplers besides rotted alum tubes at right rear wheel. But ac does get to 24 degrees at vents bringing it back to life little by little.

 

[Snowbound]

For my 08 Esky but I may get you close.

manual rear controls.


Auto rear controls

 

[Douglas Friedberg]

Someone mention looking through the ac posts that wiring diagrams where posted somewhere for rear ac systems
Mine being 2006 Yukon XL SLT
my gremlin is the rear blower motor hot or cold works when it wants to. And when it does everything works as advertised when it doesn’t no blower motor at all in rear in any mode. went banging around no dice. Can some save me some time finding this or diagram.
For giggles and thoughts

245,000 miles on original fuel pump tubes rotted off and fuel leak also was evap error code had to cut out some of the main steel line and hose it.
Just finished rebearing G80 rear end and axle bearings. To bad someone gutted parking brake system. 5 diff leaks in o ring couplers besides rotted alum tubes at right rear wheel. But ac does get to 24 degrees at vents bringing it back to life little by little.

In reference to rear ac heat blower motor operation it seems that when people use the rear seat for some reason the blower winds up coming on when the controls are left on all the time anyway. Werd but maybe not, is the wire loom under seating area for rear controls to rear ac heat unit blower ??????? in the floor somewhere?????

 

[Douglas Friedberg]

In reference to rear ac heat blower motor operation it seems that when people use the rear seat for some reason the blower winds up coming on when the controls are left on all the time anyway. Werd but maybe not, is the wire loom under seating area for rear controls to rear ac heat unit blower ??????? in the floor somewhere?????

One thing I have noticed about system it comes on whenever it wants to on its own. I leave the controls on for it. And the controls all work as they should. How does the wiring run under the floor for this system. It seems like there maybe something going on with that because after I move around back there it may coincide with that

 

[rdhogg]

My rear blower motor was not working at all , the control switch appeared to be working but no air was coming out of the rear vents. I did a couple of half baked YouTube videos of the process on my 2013 Tahoe. It might help.