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2003 chevy trailblazer_lt
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Discussion Starter · #1 · (Edited)
I couldn't find a good how-to for fixing the climate control light, so I took some pic's when I replaced mine.

Here's how I did it:

Remove the climate control module from the car. See other threads here on how to remove the dash.
Remove the 2 screws on the white tabs that hold the unit in the dash. <Image Below>

Remove the 2 electrical connectors from the back of the unit (1 Blue, 1 Black)

Remove the 2 round control knobs and the 2 slider knobs. <Image Below>


Remove the 4 small black screws from the back corners of the unit. <Image Below>
IIRC this is an SAE size nut.
Do not touch the screws on the black connector.


Pull the front (black) 1/2 of the housing from the back (white) 1/2 of the housing.
Once the black front is off you will see the circuit board. <Image Below>
You will see the light bubs to the right and left of the slider. <Red Arrow>
Press the white retaining clips to release the circuit board.


Flip the circuit board over and find the (2) terminals for the Bulb <Image Below>

I used Chem-wik to remove the solder from the terminals.
Once the terminal is de-soldered, remove the burnt out bulb.

Here is the replace bulb package from Radio Shack <Image Below>
Part # 272-1154


Install the bulb in the circuit board and resolder.
Put climate control unit back together and re-install.
 

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2005 chevy trailblazer_ls
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977 Posts
I couldn't find a good how-to for fixing the climate control light, so I took some pic's when I replaced mine.

Here's how I did it:
Perfect timing! :hail: I have to replace the stepper motors in the Instrument Cluster and I am going to fix my climate control light at the same time. I'm ordering the stepper motors and bulbs from eBay today. Thanks for the great writeup.
 

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2006 chevy trailblazer_ls
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19 Posts
Thanks

Thanks for the write up. I have the same problem. I was going to ignore it but now I won't have to.
 

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2005 chevy trailblazer_ls
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977 Posts
Long story short, I destroyed two A/C controllers trying to take the Sliding Control Knobs off (Item 4 in the drawing). Three of four rheostat sliders disintegrated. Now I'm buying a new controller from the dealership because the salvage yard doesn't have any more available. Good luck with yours.
 

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2003 gmc envoy_sle
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is there any tricks or tips in getting the knobs or slide bar levers off without breaking them? I want to replace my bulbs, but the knobs don't feel like they want to come off!

Any advise?
 

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2005 chevy trailblazer_ls
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977 Posts
is there any tricks or tips in getting the knobs or slide bar levers off without breaking them? I want to replace my bulbs, but the knobs don't feel like they want to come off!

Any advise?
I was very careful. I tried using my fingers first, then pliers, and finally a fork. I applied constant pressure, but I ruined three sliders regardless. Just out of curiosity, after the shaft separated from the slider, I used pliers to grip the shaft and knob. I was able to take the knob off of the shaft, but it took a lot of pulling. Fat lot of good it did me.

I located a used controller in Florida. The guy wants $12.99 for it. It would cost me about $125 to ship it FedEx to UAE in about 3 days. USPS would be about $60 for 6 - 10 days. I don't have that kind of time so I'm buying one from the dealer for about $160, which is a good price because Compnine lists it for $281.

AC-Direct sells new controllers for $105. Both the used and new controllers can be found on mySimon.com, which is part of Amazon.com. There is only one used controller. The best way to find it is to search for AC Delco #15-73227. The latest GM part number is 29545046.

Good luck with fixing your light. It has been a real pain for me because of the knobs.
 

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2003 chevy trailblazer_ls
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63 Posts
Can someone give me a sanity check? The red/blue indicators (behind the sliding control knobs) on my faceplate light up on both sides. The sliding control knobs do not light up. I'm pretty sure that these use to, but now I am questoning myself. Looking at these pics, it appears that the same bulbs would light both. Are these sliding control knobs suppose to light up? If so, my do not. Any ideas? :confused: Thanks
 

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2005 gmc envoy_slt_xl
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18 Posts
I couldn't find a good how-to for fixing the climate control light, so I took some pic's when I replaced mine.

Here's how I did it:

Remove the climate control module from the car. See other threads here on how to remove the dash.
Remove the 2 screws on the white tabs that hold the unit in the dash. <Image Below>

Remove the 2 electrical connectors from the back of the unit (1 Blue, 1 Black)

Remove the 2 round control knobs and the 2 slider knobs. <Image Below>


Remove the 4 small black screws from the back corners of the unit. <Image Below>
IIRC this is an SAE size nut.
Do not touch the screws on the black connector.


Pull the front (black) 1/2 of the housing from the back (white) 1/2 of the housing.
Once the black front is off you will see the circuit board. <Image Below>
You will see the light bubs to the right and left of the slider. <Red Arrow>
Press the white retaining clips to release the circuit board.


Flip the circuit board over and find the (2) terminals for the Bulb <Image Below>

I used Chem-wik to remove the solder from the terminals.
Once the terminal is de-soldered, remove the burnt out bulb.

Here is the replace bulb package from Radio Shack <Image Below>
Part # 272-1154


Install the bulb in the circuit board and resolder.
Put climate control unit back together and re-install.

Is the electronic climate control the same repair?
 

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2006 chevy trailblazer_ls
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118 Posts
My driver side temp selector is burned out and the entire dial on the passenger side (head, head/foot, foot/defrost,etc..) judging by the pic the selector dial had 3 bulbs is this correct? The 3 blue things on each side????
 

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2005 chevy
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6,877 Posts
My driver side temp selector is burned out and the entire dial on the passenger side (head, head/foot, foot/defrost,etc..) judging by the pic the selector dial had 3 bulbs is this correct? The 3 blue things on each side????
The 2 bulbs on the left, and 1 on the right, are for the button selectors at the bottom of the module. Fan speed appears to have 1 bulb, mode selector appears to have 2 bulbs.
 

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2005 gmc envoy_sle
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7 Posts
I was able to remove the temperature dials by just pulling on them and carefully working them off.

The driver side temperature backlight failed, but I replaced both driver and passenger side backlights, believing that if one went out, the other may not have been far behind.
 

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2002 chevy trailblazer_ls
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1,439 Posts
My passenger side slider is dark. I smacked it and it came back on :p but a few days later it went dark again, this time permanently.

I'm just going to convert to LED (gauge cluster also) but I'm waiting until I figure out how best to get it apart without busting the sliders and also waiting on money and time. Other, more important things want the cash and I can live with the dark slider for now since I can still get an idea of where it is set at. And during the summer it is always at the lowest setting anyway!
 

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Banned
2005 chevy
Joined
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6,877 Posts
My passenger side slider is dark. I smacked it and it came back on :p but a few days later it went dark again, this time permanently.

I'm just going to convert to LED (gauge cluster also) but I'm waiting until I figure out how best to get it apart without busting the sliders and also waiting on money and time. Other, more important things want the cash and I can live with the dark slider for now since I can still get an idea of where it is set at. And during the summer it is always at the lowest setting anyway!
:undecided Here's an option... :coffee

How not to break the sliders in your manual HVAC
 
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