2003 trailblazer aux plug need information does it stay on all the time

First you need to have EBCM - electronic brake control module check for DTC'S - diagnostic trouble code's . If the light is on there is a code stored . I think most part stores can do this and for free . After you find out what code is stored , looking up that code in service repair information for diagnostic trouble shooting chart would be next step . There are a few codes too.
DTC C0035 or C0040
DTC C0045 or C0050
DTC C0110
DTC C0131
DTC C0161
DTC C0186
DTC C0196
DTC C0201
DTC C0240
DTC C0241 or P0856
DTC C0244 or P1689
DTC C0245
DTC C0283
DTC C0287
DTC C0290 or C0292
DTC C0455
DTC C0550
DTC C0558

Find the code do the diagnostic's , fix the problem , wiring issue's , a sensor , bad module ,what ever it is . The light will go out then . Here is a sample of code discription .
• DTC C0035 Left Front Wheel Speed Sensor Circuit
• DTC C0040 Right Front Wheel Speed Sensor Circuit

The cluster has bulbs in the back depending on the make and year of vehicle. Solder welds can break over time also.

If you need further help, reach me via phone at https://www.6ya.com/expert/chris_b82b45c59bcf133d

This is a pretty common issue for Trailblazers to have. Here's a link with more information about these GM gauge problems. And where you can purchase replacement parts on Amazon if you want to do the repair yourself.
Trailblazer Speedometer

cylinder #1 misfire, could be the spark plug, the cables or the coils, did you do a tune up to your car lately? or a fuel injector is failing, go for the plugs first and cables, some times is a process of elimination, Thanks

• There was a Technical Service Bulletin concerning this.
  

• Bulletin No.: 03-08-52-002
  
• Date: March 27, 2003
  

• Technical - Subject:
  
• Remote Keyless Entry Inoperative (Reprogram Liftgate Module)
  

• Models:
  
• 2002-2003 Chevrolet TrailBlazer, TrailBlazer EXT
  
• 2002-2003 GMC Envoy, Envoy XL
  
• 2002-2003 Oldsmobile Bravada
  

• Condition
  
• Some customers may comment that the Remote Keyless Entry (RKE) is inoperative at times.
  

• Cause
  
• An anomaly has been identified with the software in the Liftgate Module (RKE functions). The Liftgate Module software is affected when the temperature is approximately 40°C (104°F).
  

• Correction
  
• Using normal SPS reprogramming procedures, reprogram the LGM Liftgate module. The information was released on TIS version 2.75 or newer broadcast in March 2003.
  

• There is a fuse block under the rear seat on the drivers side. Fuse # 3 and # ^ are the ones you will check for the Lift Gate.
• Often the problem can be in the harness going to the module.
• Sometimes the module needs replaced and then reprogrammed.
• Here is a copy of your owners manual for free http://www.extendedgmwarranty.com/owners-manual/chevrolet/2002-Chevrolet-TrailBlazer.pdf
• If you have any comments please feel free to leave them here.
  
• Hope this helps and thank you for using FixYa.
  

Regards, Tony

Give me some more information about this problem. May be i can help.

The fuses for the auxilliary power outlets are located in the rear fuse panel located under the left second row seat.

The fuse for the console and two front outlets is fuse #46 (20 Amp) and is marked "AUX PWR 1"
The fuse for the rear power outlet is fuse #15 (20 Amp) and is marked "AUX PWR 2"

need to have the body control module scanned for codes.may need to go to the dealership for fix

The door sensor needs adjusting. It may be loose.
Loosen the lock nut on the pushbutton sensor in the door frame.
Unscrew the sensor a little and re-tighten the lock nut.

have the sysem replace