that actuator closest to the floor on the passenger side in my 04 z71 tahoe controlls the driver's side temperature, even though it has the same symptoms as yours, i need to find which actuator controls the air on the passenger side, because my driver's side is fine, it blows cold air, but my passenger side actuator blows hot air only.
Not to call out the OP, but I think things are a bit swapped, specifically the pictures. Some of them are from
this Sparky's guide that is for fixing
hot air blowing out of the driver side vents despite changing controls. The actuator that effects the driver's side is the "easy" one, located behind hush cover on the passenger side. Honestly, judging by those guides and the rest of this thread, I think the OP is for fixing the driver side hot air, not passenger. The part just happens to be on the passenger side, and the same part for both fixes.
I believe the true DIY guide for fixing
hot air blowing out of the passenger side vents despite changing controls is
this Sparky's guide. This one is "behind the radio", towards the firewall. This will take time.
That said, both fixes use
the same part (GM# 89018365). $80 at the time of this post.
To those still confused: I strongly suggest you go somewhere or use your own OBD 2 and pull your codes, because the actuators should spit some if they're out. This will tell you what you need to fix.
For code information and additional information relating to the issues mentioned in this thread (stuck on hot air, ticktock sound) see the following quote:
GM BULLETIN #1
______________
HVAC System Cannot Be Controlled Or Defaults To Defrost Mode (Repair HVAC Actuator Harness)
Models: 2003–2005 Cadillac Escalade, Escalade ESV, Escalade EXT
2003–2005 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2003–2005 GMC Sierra, Yukon, Yukon XL
Condition
• Some customers may comment that they cannot control the HVAC (heating, ventilation and air conditioning) system. Others may comment that the HVAC system defaults to the Defrost mode.
• Technicians may find that the following diagnostic trouble codes have set:
• B0229 Recirculation Actuator
• B0414 Left Air Temperature Actuator
• B0424 Right Air Temperature Actuator
• B3770 Mode Actuator
Cause
The HVAC actuator harness may contact a sharp edge on the instrument panel support brace, causing a rub through condition and a ground out of the actuator control and/or feedback circuits.
Correction
Locate the HVAC actuator harness contact point under the instrument panel with the instrument panel compartment door opened and folded downward. The actuator harness is located in the left side of the opening in the instrument panel.
Technicians are to inspect the HVAC actuator harness for contact with the instrument panel support brace. Repair any damage to the actuator harness wiring and install protective plastic conduit over the harness. Install friction tape over the sharp edge of the instrument panel brace. Clear the diagnostic trouble codes and verify proper HVAC system operation.
GM BULLETIN #2
______________
Intermittent Ticking Noise from I/P, Poor A/C Performance, HVAC DTCs B0229, B0414, B0424, B3770, (Reprogram HVAC Control Module)
Models: 2004–2006 Cadillac Escalade Models
2004–2006 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2004–2006 GMC Sierra Models, Yukon Models
with Air Conditioning (RPOs CJ2, CJ3)
Condition
Some customers may comment on one or more of the following concerns:
• Intermittent ticking/clicking noise from the instrument panel.
• Recirculation mode does not work or Air Conditioning (A/C) system performance is poor during high ambient temperatures.
• Unable to control the driver side temperature.
• Unable to control the passenger side temperature.
• Unable to change the front system modes.
Cause
This condition may be caused by the Heating, Ventilation and Air Conditioning (HVAC) actuators that may hunt for the correct commanded position. This cycling may cause a clicking or ticking noise.
An overtravel of the HVAC system control doors may cause one or more of the concerns listed above. If an overtravel occurs, a Diagnostic Trouble Code (DTC) will be set, and the door will go to a preset default position. When a system door defaults, that door will stay at the default position until the DTC is cleared. After the DTC is cleared, the door will operate properly until the overtravel condition re-occurs.
Correction
Technicians are to perform the normal diagnostic procedures for these concerns. If diagnostics show that the HVAC system door(s) travel below 5 counts (out of the lower range) or above 250 counts (out of the upper range), then update the software calibrations in the HVAC control module.
The new calibrations have been updated to compensate for the actuator overtravel condition, the actuator hunting and the ticking/clicking noises. The new calibrations effectively eliminate the codes listed above, the default position of the doors associated with the DTCs and opens up the feedback position value. The new calibrations should not be used unless the vehicle has one or more of the customer concerns listed above or a DTC listed above has been set. The new calibrations will not correct any other DTC or A/C system performance concern.
In closing, something I strongly recommend to everyone attempting this is while you are elbow deep in your dash board, check your wires for abrasions or full incisions. If you see them, and that may be the issue, splice n fix and make sure it doesn't happen again!
As well, it seems that disconnecting the battery can lead to some of these issues. Before attempting to replace the part (Note: Always do this after installing), try recalibrating the actuator by either using your OBD 2 scanner or disconnect the battery for a full 60 seconds, reconnect it, start the engine,
do not touch the AC controls or anything that could adjust it (driver profiles), after 4 minutes of the engine being on turn it off, wait a few seconds, then start the engine again. AC controls should function as normal.
I haven't actually done this install yet as I simply haven't had the time, and it will take time. I'll be doing mine Thursday, so if after that I have anymore to add I will certainly do so. I hope it works.
