Question about 2004 Buick LeSabre

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How do you replace the lights in the buttons in the dash for the HVAC ??? I have 4 that do not light.

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I had the same problem. Dealer said it would be $632 for the PART!! Nice, considering it SHOULD be about a $25 repair (GM design flaw)!! I found bulbs at RadioShack (part #272-1154) that work well and soldered them in myself. You just need to take the trim panel off that's in front of the HVAC unit (it snaps out, BUT there are two screws you need to take out in the glove box first). Then the HVAC unit just pulls out with 4 finger clips in front. The trick is getting a 3/16" nut driver to take out the 4 screws to remove the face from theHVAC unit (I found a nut driver socket in a kit at ACE Hardware). I unplugged the circuit board from the main body before soldering. It's only been about a week, but things are working fine.

Posted on Nov 27, 2009

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  • martinatwest Apr 27, 2011

    The correct bulb is a 14 volt 0.065 amp minature, part number is 8111 and is available on eBay for US $1.00 each (search 8111 bulb and buy the ones with wires attached ... also I see 20,000 hour double life bulbs listed). Speaking about bulb life ... running the dash lights at a lower brightness will extend bulb life, even 2 volts under rated voltage (in this case 14 volts) extends the life approximately 3x. Best wishes!

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Depending on which lights you mean, most of them are non serviceable as far as i know, and you need to replace the inner panel.

Posted on Nov 12, 2009

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It is due to the hvac being out of calabration. On the left side of the A\C control panel hold down the top and bottoms buttons with the engine running, high blower, panel, full cold (both levers if so equipped). When the lights on the panel come on solid and then start flashing release buttons. It will take about 2 mins or less for it to calibrate. If only the top left button is flashing you are done. Press that button once or restart van all function should be normal.

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How to replace Dash light on temper control passenger side


Dismantling and mantling.
  1. Remove the I/P accessory trim plate. Refer to Instrument Panel Accessory Trim Plate Replacement (Refer To List 1) or Instrument Panel Cluster Trim Plate Bezel Replacement (Refer To List 2).
  2. Remove the HVAC control module screws.
  3. Depress the HVAC control module tabs (3) and remove the HVAC control module (2) from the I/P (4).
  4. Disconnect the electrical connectors (1) from the HVAC control module (2).

fix the module..... what ever.
and put it back
then see the last step.

Refer to Control Module References for programming and setup information.
then states
If the HVAC control module is replaced, an automatic re-calibration of all the actuators will occur. No additional procedures are necessary.

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I would first remove the fuse for the heater control head for one minute and then put in and retry.
The control head could have locked up on you with a volt spike. The rear defrost switch does not go through the same circuit in the heat as the hvac controls. Could be a broken know also.
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#76-11-01: HVAC CONTROL KNOB SPINS FREELY (REPLACE) - (Oct 9, 1997) 999999995.gif SUBJECT: HVAC CONTROL KNOB SPINS FREELY (REPLACE ALL THREE KNOBS)
MODELS: 1996-97 CHEVROLET AND GMC M/L AND G VANS 1995-97 CHEVROLET AND GMC C/K TRUCKS
CONDITION:
SOME CUSTOMERS MAY REPORT THAT ONE OR MORE HVAC CONTROL KNOBS SPIN FREELY, RESULTING IN LOSS OF FAN, TEMPERATURE AND/OR MODE OPERATION.
CAUSE:
THE KNOB'S PLASTIC INNER SHAFT MAY CRACK WHEN FORCED AGAINST ITS STOP.
CORRECTION:
IF ANY ONE OF THE THREE HVAC CONTROL KNOBS EXHIBITS THIS CONDITION, REPLACE ALL THREE KNOBS WITH NEW P/N 16268157.
PARTS INFORMATION:
P/N DESCRIPTION QTY 16268157 KNOB, HVAC CONTROL 3

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6e3d291.jpg
When you have the panel loose ( don't move too far, the HVAC controls and the Passenger Airbga Deactivated light are still hooked up ), un hook the 2 cam over connectors ( circled in blue ). After hooking back up, the HVAC will be off, you need to manually turn it on.
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Good Day,


Sounds to me like your headlight switch needs to be replaced. When you turn your light's on (parking or headlights) the switch sends two outputs, one to the exterior lights and the other output is your cluster and hvac illuminaton. You can get a new switch from a dealer for around 30 bucks new. Here's a pic of what you need:

f92dbb2.jpg
You do need to remove your outer dash panel to gain access.

Sorry this posting is so short, just worked a 14hr day. If you need further help with replacing the switch I can walk you though the process.

Hope this helps for now.

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