2003 sierra 4wd trouble

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02-20-2010, 11:50 AM

jswc61

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Join Date: Feb 2010

Posts: 1

2003 sierra 4wd trouble

2003 sierra 4x4.... 4wd doesn't work in 4HI but works perfect in 4LO... what might cause this

03-21-2010, 09:31 PM

GMC89

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Join Date: Jun 2009

Posts: 87

Transfercase??

Sounds like it to me...Something buggerd up inside.

01-21-2023, 09:12 PM

electech

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Join Date: Jan 2023

Location: SC

Posts: 3

Remove the TCM fuse for a few and reinstall. This fixes mine when showing neutral red but still in 2wd.

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