How many Blend Door Actuators does this truck have and where are they located?

GUNNERGARIDEL

MEMBER
2002 GMC SIERRA
6.0L
V8
2WD
AUTOMATIC
316,000 MILES

I have the truck listed above 1500HD with A/C.

It is a single climate control. It does not have dual passenger climate control.

Saturday, January 1st, 2022 AT 10:38 AM

7 Replies

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

Hi,

There should only be one. If you look at picture 1 below, I highlighted its location.

The remaining pictures are the directions for removal and replacement.

I'm not sure of the problem you are having, but if there is something I can help with, let me know. Additionally, here is a link that explains in general how one is replaced. It may actually be more helpful.

https://www.2carpros.com/articles/replace-blend-door-motor

Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below. Note: The last pic is the recalibration steps which is basically removing power from the HVAC module for at least a minute.

Images (Click to make bigger)

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Saturday, January 1st, 2022 AT 11:27 PM

GUNNERGARIDEL

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Thank you so much! Especially the part about recalibration!
If I have any questions, i'll get back to you.
Happy New Year!

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Sunday, January 2nd, 2022 AT 12:21 AM

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

You are very welcome. Let me know how things turn out for you. If I can help in any way, let me know.

Take care and Happy New Year to you, as well.

Joe

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Sunday, January 2nd, 2022 AT 6:08 PM

GUNNERGARIDEL

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Greetings, again! I have seen reference to 'DTC'. I assume the D = Diagnostic and the C = Code, but I'm not so sure about the 'T'. Is the T = Trouble?
If I'm wrong, please enlighten me.

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Sunday, January 2nd, 2022 AT 8:37 PM

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

Hi,

DTC simply stands for diagnostic trouble codes. Basically, the codes that are stored in a vehicle's computer identify a potential cause to a problem or the problem itself.

For example, the DTC P0301 is a code that identifies a cylinder 1 misfire. There are many DTCs or codes.

To retrieve DTC, you need a scan tool on vehicles after 1995. Before then, you could retrieve them with or without one. The year 1995 was the turning point or change over from OBD1 to OBD2 diagnostic systems. (OBD = On Board Diagnostics).

If you watch this quick video, it explains how DTC's are retrieved.

https://youtu.be/b2IJGfImVvw

I hope this helps. Let me know if you have other questions.

Take care,

Joe

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Sunday, January 2nd, 2022 AT 9:10 PM

GUNNERGARIDEL

MEMBER
22 POSTS

Greetings, Again, Joe!
Thanks for your help on the blend door actuator. Unfortunately, when I tried to recalibrate, it failed to do so. I am only having air come from the upper vents.
Let me add a bit to what I asked before. I replaced the actual control module in the dash, and then the blend door actuator but not at the same time. So, it occurs to me this may be why there is a problem.
Any advice you can give me about correcting this will be appreciated. For example, should I pull both parts and then reinstall together at the same time then recalibrate?

Dudley Garidel
Baton Rouge, LA

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Friday, January 7th, 2022 AT 8:33 AM

JACOBANDNICKOLAS

MECHANIC
109,700 POSTS

Hi,

I don't think you need to remove them. Either you could pull a fuse or disconnect them for about 5 minutes and then connect and see if that helps.

Let me know if that helps.

By the way, LA sounds like a great place to be this time of year. LOL It's 10 degrees here.

Take care,

Joe

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Friday, January 7th, 2022 AT 6:07 PM