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Light for the AUTO 4 wheel drive and the 2 & 4 wheel drive buttons change on its own?

Tiny
SHUAN
  • MEMBER
  • 2003 CHEVROLET TAHOE
  • V8
  • AWD
  • AUTOMATIC
  • 10,000 MILES
The truck is RPM ing high and low in the morning. The at stops it might RPM up and down just a little. Then the panel light for the AUTO 4wheel drive and the 2 & 4 wheel drive buttons change on its own. So it seems to be shifting on its own. Is this a computer chip gone bad.
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Wednesday, January 28th, 2009 AT 8:07 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

It sounds like you might have an issue with the transfer case control module.
That is located on the left side of the instrument panel, behind the headlight switch (see diagram).
It controls all the functions for the transfer case selection.
This module can be reprogrammed to function properly.

I have included the reprograming procedure as well as replacement procedure.

Please let me know of any questions.
Thank you.

https://www.youtube.com/c/2carpros/featured
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Monday, September 20th, 2021 AT 2:26 PM

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