2003 GMC Yukon Denali "rear vents hot" Questions

hot you cant put your hand next to the vent when driving its cool the rear heat works all the time no problem there and this happens all the time.I replaced the thermostat which helped cause before it

...rear vents but blowing hot on passenger side. Do you think it is a mixing box problem? If you only need the A/C to work (at least for now) on the passenger side, remove the panel from below the ...

...rear is working well and front is not I would suspect a blend door or actuator issue in the front.Double check and see if you can hear anything moving when you are adjusting temperature from hot to ...

heater blow cold air in front hot air in rear Cannot get hot air to blow out through the front vents, but it blows hot air through the rear vents. could be blend doors in heating duct work.

...rear vents but not out of the front vents. Why could thi be? I changed the thermostat and replaced the coolant but when the heater is on hot air only blows out of the rear vents. Cold air still blows ...

...rear vents blow hot air Could be a blockage in the lines to the rear unit.Might be low on freon too.  Or a blend door problem.Can you check under the floor and see if one of the lines is cold

...vents and rear vents blow very hot air. Measured front vent at 50F and middle/rear vents at 110F I checked thermometer performance, it is accurate. Thought it might be low on refrigerant but at about ...

...the front vents and hot air out of the rear passenger vents? If the air coming out of the front is just cool and not cold, and the rear vents are warm, you have low freon and need to have it

...cold then turn to hot within a few seconds while rear a/c and passenger side vents continue to blow cold. Sounds like the vent doors are switching to heat mode but why? something fell down defrost ...

...ac vents hot rear cools fine the front starts cooling but the longer the engine runs the hotter it gets on the front vents. the rear vents cotinue to cool fine. a blend air door may be ...