Question about 2002 Chevrolet Silverado 1500

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How many hvac blend door actuators are there in a 2002 chevy silver ado and where are they located. I tried to purchase the part and it gave me an option for upper and bottom actuators. I need to know exactly where to located the actuator in this truck

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  • william costello Jan 31, 2011

    This was very helpful and thank you. I actually found out a few months ago that there was just a plug somewhere that wasn't connected for some reason. It had the same symptoms of the actuators being down. Maybe you want to trace all your heating system wires first and check for good connections/continuity? Either way thanks much for the help.

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I'm having the same problem with my 00 GMC Sierra. If you do NOT have dual zone climate control, it's just to the passenger side of the transmission hump under the hush panel underneath the dash. 3 screws take off the hush panel, two take off the actuator. One screw on the hush panel is a pain in the **** to get out. I'm still trying to figure out if the "upper" or "lower" is the proper fit for it. If you have dual zone, then one is under the passenger side, and the other is under the driver side. Hope this helps!

Posted on Jan 31, 2011

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Replacing 2002 chevy tahoe blend door actuator


Generally,they will be located under the middle of the dash between the blower and the controls...find a service manual for exact location

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Where is the a/c actuator located on a 2001


when you say actuator are you referring to the blend door actuator that controls the temperature? or the relay that actually turns the a/c compressor on?
if your talking about the actuator for the blend door and you have dual zone climate control its worth it to take it to a mechanic. they are located in the top of the hvac duct work behind the glove box. they are a real pain to get out, very limited access, you have to remove the glove box to get to it and remove the radio to see it

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2002 Dodge Status R/T Coupe 3.0. When you turn the A/C on the indicator flashes and it only blows warm air. Took it to Firestone to have problem diagnosed and they determined that it was not the...


If, as Firestone says, the compressor and all components are operating properly, then you should be able to feel the low pressure hoses/tubes and confirm that they are icy cold (and sweating usually) when the a/c is on. If this is the case, then your blend door is not working properly. The blend door is inside the HVAC unit under the dash, and it directs incoming air to either the a/c evaporator or the heater core, depending on what is selected on the control panel, or it 'blends' air coming through both units. The blend door itself is hard to get to, but the blend door actuator (moves the blend door according to what is selected) is sort of accessible without pulling the dash. See the link for location, and also how to self test the HVAC system.
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Problem with dual zone heating only one side i check control thermost botton is ok


Sounds like the blend door actuator. It separates the driver and passenger side from getting air on the AZC system. Here are some instructions on replacing it:
The passenger side blend door actuator is used on all models equipped with Automatic Zone Control (AZC). This actuator is located on the front of the HVAC housing to the right of the floor panel transmission tunnel and cannot be removed from the passenger compartment without instrument panel or HVAC housing removal.

NOTE: This procedure is for AZC Systems (Passenger side only).

  1. Disconnect and isolate the battery negative cable.
  2. Remove the glove box door. See: Body and Frame\Interior Moulding / Trim
  3. Remove the lower I/P glove box door surround panel.
  4. Remove the dash assembly. See: Body and Frame\Interior Moulding / Trim\Dashboard / Instrument Panel\Service and Repair\Instrument Panel Assembly
  5. Remove the HVAC assembly. See: Housing Assembly HVAC\Service and Repair
  6. Unplug the wire harness connector from the blend door actuator.
  7. Remove the 2 screws that secure the blend door actuator to the HVAC housing.
  8. Remove the blend door actuator from the HVAC housing.
INSTALLATION - AZC (Passenger side only)


  1. In stall the blend door actuator on the HVAC housing and tighten the two mounting screws to 2.2 Nm (20 in. lbs.).
  2. Plug in the wire harness connector to the blend door actuator.
  3. In stall the HVAC unit into the vehicle. See: Housing Assembly HVAC\Service and Repair
  4. Install the instrument panel assembly into the vehicle. See: Body and Frame\Interior Moulding / Trim\Dashboard / Instrument Panel\Service and Repair\Instrument Panel Assembly
  5. Evacuate the HVAC system.
  6. Recharge the HVAC system.
  7. Connect and the battery negative cable.
Hope it helps! If you need more, just send me an email at familyguy77351 at yah I wil be glad to finish helping you with more detail.

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1 Answer

Afternnon, just wondering about the best way to locate the blend doors in the hvac box without ripping out the dash on my 2000 jeep grand cherokee. Thanks in advance. Duane


y9ou can gain access to the driver side blend door actuator by removing the glove box. The actuator will be in the left corner of the glove box opening. If you remove the actuator you will be able to turn the pin. If you can turn it 360 degrees the blend door is broke.

If your lucky its only the drivers side. If you get the repair kit from chrysler it will come with instructions with pictures on how to replace the blend door without pulling the HVAC unit/Dash. If the passenger side is broken the HVAC unit will need to be removed.

Heater treater (google them) also have a metal blend door replacement and instructions online on how to replace them without pulling the HVAC housing.

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there is a blend door actuator for the laredo and if is bad the air wont come out here is a pic of what it looks like and how to get to it


The single zone heater-A/C system is equipped with a single blend door actuator. The dual zone system has two blend door actuators, one for the driver side blend-air door and one for the passenger side blend-air door.
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  1. Disconnect and isolate the negative battery cable.
  2. Remove the glove box from the instrument panel.
  3. Remove the three screws that secure the blend door actuator to the passenger side of the HVAC air distribution housing .
  4. Remove the blend door actuator from the air distribution housing and disconnect the HVAC wire harness connector from the actuator.
  5. Remove the blend door actuator from the vehicle
to instal
  1. Position the blend door actuator into the vehicle.
  2. Install the blend door actuator onto the passenger side of the HVAC air distribution housing . If necessary, rotate the actuator slightly to align the splines on the actuator output shaft with those on the blend door cam .
  3. Install the screws that secure the blend door actuator to the passenger side of the air distribution housing . Tighten the screws to 17 inch lbs. (2 Nm).
  4. Connect the HVAC wire harness connector to the blend door actuator.
  5. Install the glove box into the instrument panel.
  6. Reconnect the negative battery cable.

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most likely needs a LH (bottom) temp actuator. Located in the center of the dash on the bottom, you have to remove the hush panel on the rh side of the truck

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2 Answers

Heating system only blows out hot air through the vents


I would look at the air blend doors first, it sound like they are not working or your control in the dash is not working send a signal to them. they work by changing the air from hot to cold or in between.

Avalanche, Sierra And Silverado
  1. Remove the floor air outlet duct extension (1) from the floor duct (2). 0900c152801c9c8a.jpgRemove the floor air outlet duct extension (1) from the floor duct (2)
  2. Disconnect the electrical connection at the blend door actuator (10). 0900c152801c9c8b.jpgBlend door actuator and related components
  3. Remove the blend door actuator mounting screws from the HVAC module.
  4. Remove the blend door actuator as an assembly with the actuator cam. 0900c152801c9c8c.jpgRemove the blend door actuator mounting screws from the HVAC module
To install:
  1. Install the blend door actuator as an assembly with the actuator cam.
    1. Line up the heater/defroster valve lever with the blend door actuator cam slot.
    2. Line up the A/C valve lever with the blend door actuator cam
  2. Install the blend door actuator mounting screw to the HVAC module.
    1. Tighten the blend door actuator mounting screw to 14 inch lbs. (1.6 Nm).
  3. Connect the electrical connection at the blend door actuator (10). 0900c152801c9c8b.jpgBlend door actuator and related components
  4. Install the floor air outlet duct extension (1) to the floor air duct (2).
C/K Series
  1. Disconnect the electrical connector to the mode actuator that is located on the left side of the air distribution case.
  2. Remove the screws.
  3. Remove the adjuster links from the control lever.
  4. Remove the mode actuator.
  5. Adjust the mode actuator by completing the following steps:
    1. Connect the electrical connector to the actuator.
    2. Turn the ignition switch to the RUN position. Allow the self-positioning of the actuator.
    3. Turn the ignition switch to the OFF position.
    4. Remove the actuator from the electrical connection. 0900c152801c9c8d.jpgBlend door actuator-C/K Series
To install:
  1. Install the mode actuator.
  2. Install the screws.
  3. Install the adjuster links to the control lever.
  4. Connect the electrical connector.
  5. Test the circuit operation

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