Question about 2005 Chevrolet TrailBlazer

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I own a 2005 Chevy Trailblazer that has a check engine light which is on all the time. The error code is P128...what is that?

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Go to autozone to get code

Posted on May 04, 2010

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Your Thermostat is stuck open. Install a new one and it should fix the problem.

Posted on May 21, 2010

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1 Answer

Abslight stays on. How to fix? This is a2007trailblazer?


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

Dec 30, 2016 | 2007 Chevrolet Trailblazer

1 Answer

CRUISE CONTROL WON'T WORK ON 2005 CHEVY TRAILBLAZER


check cruise control fuse and check the brake lights see if brake light working because the brake light switch will deactivate cruise control when brakes is applied.if brake lights dont work either fuse blowed or switch bad.if all is good have vechicle code scan because cruise control control by PCM and vechicle speed sensor and thottle actuator control motor.

Apr 17, 2013 | 2004 Chevrolet TrailBlazer

1 Answer

2005 chevy pickup cutting out especially in the rain


does service engine soon light come on ? check for codes, spark plug wires might need replaced, replace air filter, has fuel filter been replaced ? do it !

Feb 02, 2013 | 2005 Chevrolet TrailBlazer

1 Answer

Chevy trailblazer turned off while driving


I think you can take a cheap obd2 code reader to check what problems caused the engine light on.

Oct 08, 2012 | 2005 Chevrolet TrailBlazer LS

1 Answer

I have a 2005 chevy trailblazer with a 6 cyl. engine. The check engine light is on and the car cuts off when you turn the air on. What could be the problem and how do i solve it.


When tha "check engine" light is turn on, some fault code is stored in the computer and just is warning about this; you will need to scanned the computer to know exactly what fault code is there.

Could be some vacuum problem, air intake sensors or other emission codes. With this code number could send you additional details.

Keep us updated.

Jul 29, 2011 | 2005 Chevrolet TrailBlazer

1 Answer

How do I reset my oil light on a 2005 Chevy


Turn the ignition to the "ON" position without starting the vehicle. Press the gas pedal in 3 times, holding it in for 2 seconds each time. When the "Change Oil" light flashes, start the vehicle.

Feb 11, 2010 | 2005 Chevrolet TrailBlazer

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