Question about 2003 Chevrolet TrailBlazer

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My 2003 chevy trailblazer tries to shift into A4WD from 2HI without me changing the setting. the vehicle bucks and tries to slip into A4WD. The A4WD blinks, while the 2HI light stays on.

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Me ajude HELP

Posted on Feb 03, 2010

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1 Answer

Show me where the shift timing solenoid located on a 2003 Chevy trailblazer


shift timing solenoid ????? There are 1-2 shift solenoids , 2-3 an 3-4 but no shift timing solenoids . An all solenoids are inside the transmission . Do yourself a favor an take your vehicle to a qualified repair shop .

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ATC will not change to 2hi


Is the air suspension down? Need make, model and year to help further.

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The service 4wd light came on in my 2002 envoy.


There are two motors under the vehicle. The front axle actuator moves ONLY during 2HI->A4WD and A4WD->2HI transitions. The transfer case encoder motor makes a lower pitched noise in every mode transition: 2HI->A4WD, A4WD->4HI, and 4HI->4LO, and the three transitions upwards.

If EITHER of the motors fails to do what the TCCM commands it to do, the switch light will flash and the Service 4WD light on the dash will come on.

If you're a DIY mechanic, you might look into them further, or just take it to a mechanic who knows our systems. The average mechanic is not going to know the theory of operation of the trailblazer/envoy 4x4 system, which is pretty unique in the industry

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Do I drive in A4WD or 2Hi?


Either one is fine I would use 2wd unless it is raining or snowy or you are on loose gravel. But you can leave it in a4wd all the time. In a4wd it will stay in 2 wd until the vehicle sees wheel slip, then it will shift into 4wd automaticly. If you have it in 2wd it won't shift into 4wd by itself.

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While set in A4WD the indicator will start


ask another GM dealer, have them check for related TSB's. could be the front acuator.

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My 2002 GMC Envoy transmission slips into neutral


try adding fluid and if still slipping neeed to have it checked could just need a fluid change

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4 lo working, 4 hi stopped working , A4WD never worked


Hi my name is Juan and I do own a trailblazer with the same year 2002 and I read the problem you have let me try to help you Have you try to shift to 4hi with your transmission in neutral ? the transmission needs to be in neutral in order to shift the transfer case to 4hi and the vehicle needs to be completely stooped also is your service 4wd light on?? if the light is on your transfer case needs service and it can be as simple as the switch inside your car or a solenoid that has not been detected by the computer

Mar 30, 2009 | 2002 Chevrolet TrailBlazer

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