2004 Chevrolet TrailBlazer Logo
Posted on Jun 23, 2011
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2004 traiblazer extended service 4 weel drive light comes on after 10 minute drive 4wd not working after that. light on 4wd switch is off. if a leave the truck alone for a day, 4wd will work. but for a boout 10 min. then is off

  • chilango44 Jul 02, 2011

    i found a guy that scan my truck and i got the codes

    C0327 ENCODER CIRCUIT
    C0550 ELECTRONIC CONTROL UNIT MALFUNCTION
    B0770 ALL WHEEL DRIVE INDICATOR CIRCUIT MALFUNCTION
    B0775 4HIGH INDICATOR CIRCUIT MALFUNCTION
    B0780 4 LOW INDICATOR CIRCUIT MALFUNCTION
    B0785 2HIGH INDICATOR CIRCUIT MALFUNCTION
    B0790 TRANSFER CASE NEUTRAL INDICATOR CIRCUIT
    B2725 DESCRIPTION UNAVAILABLE

    so what is the nex step? because i do not know what the codes mean.

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2 Answers

Ryan Lutton

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  • Chevrolet Master 1,267 Answers
  • Posted on Jun 23, 2011
Ryan Lutton
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I would find an independant shop that has a Tech 2 or equal scan machine....these can communicate with your TCM (Transfercase Control Module) and narrow down what the problem is.

Freddy

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  • Chevrolet Master 1,311 Answers
  • Posted on Jul 17, 2011
Freddy
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I agree with solution above, but before spending money for diagnosis, do the following; with key off, rotate 4WD selector switch thru all of its positions numerous times (>25), then see if any of the lights work and the functions (A4WD, 4HI & 4LO) work. Sometimes the switch contacts build up corrosion and cause strange problems. If this does not resolve the problem, the TCCM or the TC encoder motor are suspect.

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http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html

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http://schematicsdiagram.blogspot.com/2011/12/car-will-not-go-into-4wd-high-or-4wd.html

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http://schematicsdiagram.blogspot.in/2012/02/4wd-light-is-flashing-and-beeping-no.html

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http://technoanswers.blogspot.in/2012/06/2002-jeep-wrangler-4wd-idiot-light-is.html

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http://whoisbyme.blogspot.com/2012/10/traction-control-switch-will-not-engage.html

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http://repairhelpcenter.blogspot.com/2012/10/4wd-light-flashing-and-4wd-will-engage.html

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Click the link below:---
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http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html

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http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html

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Car will not go into 4WD high or 4WD low?


http://schematicsdiagram.blogspot.com/2011/12/car-will-not-go-into-4wd-high-or-4wd.html

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No 4x4 light on dash?

http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html

------------
4 wheel drive system will not disengage?

http://technoanswers.blogspot.com/2012/01/4-wheel-drive-system-will-not-disengage.html

----------
4WD light is flashing and beeping? NO 4WD high?

http://schematicsdiagram.blogspot.in/2012/02/4wd-light-is-flashing-and-beeping-no.html

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2002 Jeep Wrangler: 4WD Idiot Light is ON?

http://technoanswers.blogspot.in/2012/06/2002-jeep-wrangler-4wd-idiot-light-is.html

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Traction control switch will not engage on 4WD High or Low

http://whoisbyme.blogspot.com/2012/10/traction-control-switch-will-not-engage.html

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4WD light flashing and 4WD will engage after few minutes

http://repairhelpcenter.blogspot.com/2012/10/4wd-light-flashing-and-4wd-will-engage.html

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2008 Toyota Tundra: 4x4 Wheel Drive Light is Flashing?

http://technoanswers.blogspot.in/2012/05/2008-toyota-tundra-4x4-wheel-drive.html

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There are many vehicles which notice same issue with 4wd not engaging in low or high mode.I suggest you few help links related to these issue,with there troubleshooting details and solutions.
Car will not go into 4WD high or 4WD low? http://schematicsdiagram.blogspot.com/2011/12/car-will-not-go-into-4wd-high-or-4wd.html

------------
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http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html

--------
4 wheel drive system will not disengage?

http://technoanswers.blogspot.com/2012/01/4-wheel-drive-system-will-not-disengage.html

---------
4WD light is flashing and beeping? NO 4WD high?

http://schematicsdiagram.blogspot.in/2012/02/4wd-light-is-flashing-and-beeping-no.html

-----------
2002 Jeep Wrangler: 4WD Idiot Light is ON?

http://technoanswers.blogspot.in/2012/06/2002-jeep-wrangler-4wd-idiot-light-is.html

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http://whoisbyme.blogspot.com/2012/10/traction-control-switch-will-not-engage.html

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