The control panel in my 2003 Chevy Tahoe Z71 stopped working. I now have heat on all the time. Can this be fixed by resetting something or will I have to buy a new unit?

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Please don't type in all CAPS, it is considered SHOUTING and is hard to read.

Your heating is run from the Body Control Module. You have a very complex vehicle, and you can't fix this yourself, you need an auto electrician with a pro grade, bi-directional scan tool to diagnose where the breakdown in communication is.

Check all of the feed wires that come off the positive side of the battery. A fuseable link may be bad.

Your climate system can only cool or heat but not both. The temperature has a big effect on this. The cooling needs the compressor.

to locate and fix the you can take help from service and repair manual which you can get from the given link to save your time and money http://toolsnyou.com/

you may need to re calibrate the system

You likely have a HVAC control head failure. The rear heater problem is likely a door actuator, the rear wiper is likely a open wire in the door jamb in the top. The gauges are likely a cluster failure.

Just got an answer from Chevy Dealer. When you replaced the battery it loses its memory as to where the door actuators were (the flaps that control the heat and A/C).

The fix:
Turn everything off and let the car sit overnight. The computer should reset itself during its learnings process.
In the morning turn on the ignition and let the car run for a few minutes before turning on the climate control.

If this doesn't work, plan on 1-1.5hours of labor for a technician to reset the actuators at the dealership.

Good luck.


Car Headlights.

first always check your fuses then if you have a autozone take it there and they can tell you what the code is and if you want to try it yourself they will give you instructions and print outs of where and how to do your job

breather pipe has a blockage!

This is something best done by a qualified repair shop . An yes it can have two different problems , not related ! Blower motors do go bad , or a control processor . Does it have manual or automatic HVAC . It would be to your benefit to have someone like this guy diagnose the problem . This is not for a rookie to try !
Diagnosing rear problems