Question about 2004 Chevrolet Avalanche

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My wife tried to shift our 2004 Avalanche into 4 wheel drive...it made a lot of noise and then the noise stopped. We went on a short trip and the truck started to make a noise in the transfer case . We had not tried to shift or change the 4 wheel drive selector at all.The noise was not very loud. We had it towed home. I have moved the truck around and still no noise...afraid to go anywhere with it. It has a dead short which kills the battery overnight now.I have been told the problem is the Encoder Sensor. Can you tell me how to dianose it properly.

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6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 1998 Chev S10 Blazer Transfer Case not shifting into 4x4

Does the 4 hi light blink when you try to put it in 4 wheel drive? My did that and it was the module.

Posted on Nov 22, 2008

  • 17 Answers

SOURCE: 4X4 LIGHTS WENT OUT STILL IN 2 W DR BUT TRANSFER CASE THINKS 4 LO

your supossed to go in reverse first for a couple feet to lock it in try that

Posted on Dec 23, 2008

  • 6982 Answers

SOURCE: 99 Silverado 4-wheel drive not engaging

It does not seem that sufficient diagnosis was done. No, you cant give a specific diagnosis like that without tearing unit down. It's likely that they told you the most common failure and left it at that. Likely there is a problem with your unit...I think this becomes more of a trust issue than a mechanical one. A second opinion from an independent reputable shop may help but either way, you need to have it fixed. In not using it much, it makes me wonder how it got worn.
good luck

Posted on Mar 19, 2009

Monster80
  • 460 Answers

SOURCE: 1999 Silverado Transfer Case Noise

I have the same problem and its in the front axle..Sounds like its in the t case but its the front axle.Make sure all your tires are the same size and same air pressure and the inner front axle seals are not leaking any fluid..

Posted on Mar 29, 2009

  • 1 Answer

SOURCE: Blazer stuck in 4 wheel high

I had the same solution with 2005 blazer......dont know how but this worked...........removed the courtesy lifgt fuse for approx. 10 minutes....put fuse back in and voila..able to shift out of 4 wheel drive

Posted on Apr 20, 2009

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