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

2003 CHEVROLET TAHOE
10,000 MILES • V8 • AWD • AUTOMATIC
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SHUAN
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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..
Jan 28, 2009 at 8:07 AM
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SQM
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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.

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Sep 20, 2021 at 2:26 PM