One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.Google+
Car Problem Reports
Chevrolet Suburban 1500 Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail
Chevrolet Suburban 1500 Problem
Average Mileage: 135,841 mi (36,000 mi - 265,000 mi)
Visitor, 2001 Chevrolet Suburban 1500, 180,000 mi
no heat from the front, but rear heat works great.
Visitor, 2004 Chevrolet Suburban 1500, 98,000 mi
Actuator door quit working and would only blow hot air on driver side and cool air on passagner side when in ac mode.
Drivers side a/c switches to heat, while passenger side blows cold.
Replaced drivers side door actuator, did not fix problem.
Turning the a/c off then shutting off car and restarting will reset all doors and actuators, fixing the problem temporairly.
Visitor, 2004 Chevrolet Suburban 1500, 41,000 mi
had ac on and driver side started blowing extremely hot air
Visitor, 2004 Chevrolet Suburban 1500, 145,000 mi
A/C and heat not putting out right temperatures, actuator making sounds. Replaced acctuator
Visitor, 2005 Chevrolet Suburban 1500, 250,000 mi
is stuck on heat or cold seems to change when it wants to but not by the control assembly.
Visitor, 2005 Chevrolet Suburban 1500, 105,000 mi
Cooling only works on upper setting. The heater will only work when the car RPM are increased and will not heat the back vents at all. There is a continuing clicking sound coming from the dashboard.
Visitor, 2006 Chevrolet Suburban 1500, 56,338 mi
actuator reprogrammed and relaced left temp. valve.
Visitor, 2009 Chevrolet Suburban 1500, 200,000 mi
Heat coming out of drivers side and cool from left side
Visitor, 2000 Chevrolet Suburban 1500, 185,000 mi
goes from cold to hot the door flips I replaced the door moter but it still does it