TSBs

Confirming GMC computer connection

June 24, 2024

Some owners of 2020-2021 GMC Sierra 2500HD/3500HD vehicles may comment about a false traction control or stability event during slow speed sharp turns and hearing a buzzing noise.

Motor Age Staff

Related To: Mitchell 1

Be sure that the computer is connected to the internet through a network cable. If there is an interruption during programming, programming failure or control module damage may occur.

Some owners of 2020-2021 GMC Sierra 2500HD/3500HD vehicles may comment about a false traction control or stability event during slow speed sharp turns and hearing a buzzing noise, mostly on tight turns going downhill like a steep driveway exiting onto a roadway. The customer may see an indicator flash on the instrument panel.

The cause of the condition may be a software anomaly causing a stability control event or traction control event to activate.

Reprogram the EBCM with the latest software. Do not download or install files using a wireless connection. Be sure that the computer is connected to the internet through a network cable.

If there is an interruption during programming, programming failure or control module damage may occur.

About the Author

Motor Age Staff

Motor Age has been publishing technical content for professional automotive technicians since 1899. Our writers have decades of experience and scores of ASE certifications, and they continue to teach new generations of technicians via classrooms all around the globe, as well as through the books and training manuals they've authored.