2003 sierra 2500 transmission issues

Asked by Zachary Sep 07, 2024 at 05:03 PM about the 2003 GMC Sierra 2500 4 Dr SLT 4WD Extended Cab SB

Question type: Maintenance & Repair

I have a 2003 gmc sierra 2500 6.0 4l80e 4wd, tach
and speedometer don’t work, the truck itself, when
viewing live data, doesnt register how fast its going.
All speed sensors ohm out to 1.39-1.42 ohms. And
it’s shifting hard. Any help would be greatly
appreciated. Thank you

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