Question about 2005 Chevrolet Suburban

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I have had the heater control module serviced by the NAPA Auto Care Center where I live 6 times. They replaced it three times and cleaned out the drain for the front and rear accy unit twice. All this was done in 2010. Now, in February 2011, it gave out again. Is this a recurring problem with this model Suburban or could it be something else? I have been told that the drain gets frequently clogged on these models, but this is ridiculous! I would like to tackle this problem on my own, can someone advise me where the drain is located and what to remove to gain access so I can service it myself?

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  • Robert Hamilton Apr 04, 2011

    I will give it a shot and see what happens. I would like to find a permanent solution to this recurring problem as I am getting a little upset with the fact that I have paid to have this fixed and still it comes to haunt me. Thanks for the advise. I will let you know what happens.



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Front right side firewall below heater core lines above frame you will see
a short section of rubber line that is black and kinda duck bill end with a slitt
when you pinch the end open up allowing dedrit to flow out
but i would check on the cabin air filter insde the heater system probably cloged up
causing system to over heat and fail
take lower heater panel off on pasenger side foot area (below glove box)
once cover removed you should see a small trap door that is retained by screw
remove then 2 filters are in this cavity remove them may need compressed air to
blow true if really dirty replaced the filters with new one and reassemble

Posted on Apr 03, 2011

  • DON MAJOR Apr 04, 2011

    no flow or low flow from blower motor will cause modul to burn up



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How to replace heater climate control box on 2000 jeep grand Cherokee

working blind, no FSM sounds like it? factory service manual.
easter egg hunts,

climate control box.
the panel (control)
  1. Disconnect and isolate the negative battery cable.
  2. Remove the center bezel from the instrument panel and place it on a workbench.
  3. Remove the screws that secure the electronic vehicle information center (EVIC) control and the A/C-heater control to the center bezel and remove the controls.

the automatic control zone module, option? AXC its called
The AXCM it it.

you scanned it and the DTC logs prove it bad.
FSM qoutes
The AZC control module is capable of three different
types of self-diagnostic tests, as follows:
² Fault Code Tests
² Input Circuit Tests
² Output Circuit/Actuator Tests
The information that follows describes:
² How to read the self-diagnostic display
² How to enter the AZC control module self-diagnostic
test mode
² How to select the self-diagnostic test types
² How to perform the different tests
To enter the AZC self-diagnostic mode, perform the
(1) Depress the A/C and Recirc buttons at the
same time and hold. Rotate the left temperature control
knob clockwise (CW) one detent.
(2) If you continue to hold the A/C and Recirc buttons
depressed, the AZC control module will perform
a Segment Test of the vacuum fluorescent (VF) display.
In the Segment Test you should see all of the
display segments illuminate as long as both buttons
are held. If a display segment fails to illuminate, the
vacuum fluorescent display is faulty and the heater-
A/C control must be replaced.
(3) After viewing the Segment Test, release the
A/C and Recirc buttons and the display will clear
momentarily. If a 0 is displayed, then no faults
are set in the system.

find it,
unplug it
unscrew it
its out.

is it not inside this part?

Mar 15, 2015 | 2000 Jeep Grand Cherokee Limited

2 Answers

In my 2001 volvo s80 are there any control modules in my rear view mirror

Yes the S80/S60 and post 2001 V70 series cars have auto dimming mirrors which have a module designed to be programmed at a dealer when replaced. If you can read the car with Vida/Dice you can look in the Network settings to see the software version number. Only modules with a matching version number can be interchanged. If you care to browse Mattews Volvo Site you can find a repair method for this type of mirror by using the glass section from another mirror while retianiing the original controller board.

Aug 18, 2014 | 2001 Volvo S80

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P0421 CODES AND C1201

C1201 error code means that you have some problem in engine control system.

Possible causes for P0421 error
  • Warm Up Three Way Catalytic converter deterioration or malfunction
  • Exhaust system leaks
  • Loose front or rear HO2Ss
  • Faulty front heater O2 sensor
  • O2 sensors harness is open or shorted
  • O2 sensors poor electrical connection

The P0421 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem.

Apr 24, 2014 | Toyota Avensis Cars & Trucks

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Po316 2002 ford taurus

P0316 - Engine Misfire Detected on Start up (First 1000 Revolutions)

I checked the P0316 and this is what I got:

1. Fuel pressure - Pump, regulator, filter or lines
2. Fuel injector(s) faulty
3. Ignition system - Ignition module, coil, spark plugs and wires
4. Fuel system
5. Update control unit software - Check for the latest control unit update
6. Powertrain or Engine Control Module faulty

I started with number three because it's easy to get too. After pulling off the spark plug wires, I started thinking the wires are about three years old. I still pulled off the wires and checked and they are still clean as can be on the inside. Also, I changed the plugs the same time I did the wires. The coil I just changed about two - three months ago because it went out on me. As far as the rest of the stuff I am not sure where I should check next. I am not 100% sure how to check the fuel pressure - pump etc. I have read the Fuel injectors are easy to change but not sure how to test them. I would like to try and test the stuff first before going and spending money that I don't need too. With that being said, I live one hour one way to the nearest auto part store so I would like to know what I need before I make the drive.

keep us updated.

Feb 06, 2011 | Ford Taurus Cars & Trucks

1 Answer

1987 ford temp automatic - will start when engine is cold, run until it warms up, approximately 5-10 minutes, then just shuts off.

This sounds like a bad control module, this controls the spark and timing, this is common, the engine runs until module gets hot then engine dies, try replacing the module, another thing is to remove the module and take to a napa auto parts store they will test i for you, make sure they test it a few times to get it hot. hope this helps.

Aug 30, 2010 | 1987 Ford Tempo

3 Answers

My fuel pump went out and the garage told me it will be $615.00 to repair, does that sound about right?

It should be less,about 400 or less,check around,and price the pump at the auto parts,napa has exact replacement for 325 dollars,and has othere napa brands for 279/if this was at all helpful,please rate,thank you.

Jul 30, 2010 | 2000 Pontiac Grand Am GT

2 Answers

No spark to spark plugs it just quit

it could be onne of three things, a crank sensor or a control module or possible coil packs, i would start by having the control module tested, if you remove it and take it to napa auto parts they will test it for free, if its good then put a crank sensor in it that should solve that problem, if the module is bed then replace it. hope this is helpful.

Jan 27, 2010 | 1998 Buick Regal

1 Answer

Ac/heater control module

I have a 1989 Olds 98 Reg. Bro. I have recently located my ac control module under the hood on the firewall. removing it should take about 20 mins depending on whats in the way. but to cost to replace is the kicker. I found the part @ NAPA for $240.00. may i suggest and look under parts for your car or one like it. the car made like mine would be a 1989 Cadillac DeVille. I hope this helps.

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1 Answer

1998 Chrysler Sebring Convertible

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