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Have a 2005 trailblazer...i cant spell worth **** but here goes..if the alternator goes out can it knock out the speedometer also? if not what will drain the battery and mess with speedometer

...i cant spell worth **** but here goes..if the alternator goes out can it knock out the speedometer also? if not what will drain the battery and mess with speedometer

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1. Have an alternator test performed, since your speedo and everything else is electrical a faulty alternator can be the problem.
2. Check your grounds, a bad, broken, corroded, or loose ground can also cause those issues.

Posted on Dec 03, 2012

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  • Cars & Trucks Master
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Yes if the alternator is out and the battery gets low all kinds of electrical problems will come up. once the problem (battery or alt.) is fixed, the other things should take care of themselves

Posted on Dec 03, 2012

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  • Cars & Trucks Master
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If your able to drive it,go to Auto zone,they will test your alternator and battery for free,you have a speed sensor screwed into transmission that controls speedo.Also check your fusible link .

Posted on Dec 03, 2012

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Posted on Jan 02, 2017

  • 7353 Answers

SOURCE: just had alternator and battery replaced on 2005

better have the new alternator checked,

Posted on Oct 09, 2009

  • 7353 Answers

SOURCE: 2006 Chevrolet Trailblazer. Battery Ok.

Whats TBC?

Posted on Feb 07, 2010

  • 77 Answers

SOURCE: battery and alternator good but charging system

I suggest getting a haynes or chiltons manule both have wireing diagrams and much more

Posted on Aug 11, 2010

  • 335 Answers

SOURCE: I have a 2005 trailblazer

Hello and welcome. this is a internal fault with the dash cluster. the dash cluster wil have to be replaced with a exchange unit. also the replacement dash cluster with have to be programmed with software for proper operation

Posted on Nov 20, 2010

WhiteFox4
  • 641 Answers

SOURCE: 2005 ford mustang gt speedometer doesnt work

Based on what you wrote here, it sounds like your ECU is going out.

Posted on Dec 11, 2011

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Speedometer reads 120 in park when driving it goes from 120 clockwise to 0


here is two websites, the second has video clips:

http://www.2carpros.com/topics/speedo.htm

http://www.2carpros.com/topics/speedo.htm

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I have a 2005 Trailblazer and the speedometer was working I stopped at a stoplight & it stopped working. Doesn't move at all.


Hi,

Pretty common issue with the 03-06 Trailblazers. What happens is the motor behind the gauge wears out over time, eventually more gauges will stop working or start acting crazy.

Check out this page for more details on Trailblazer instrument cluster repair.

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I looked down and the speedometer in my 05 Trailblazer said I was going 120 mph. When I stopped and put the car into park, the speedometer stuck at 70 mph. I need a simple, cost effective solution. Please...


This is a very common problem with Trailblazers and is caused by a fault speedometer stepper motor - the actual motor that makes your needle move around is wearing out.

You have two solutions, if your Trailblazer has 70k miles or less you can take it to your local Chevy dealer and they will replace it for you as part of a recall.

If you have over 70k miles visit my Trailblazer speedometer page here: http://drspeedometer.com/services-i-offer/trailblazer-speedometer-repair

I specialize in the repair of these units and offer free shipping and a great guarantee on my work.

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I CHANGED TIRE SIZES ON MY 2005 ASTRO VAN AND NOW


see the dealership about a calibration to computer

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