Forum Discussion
Defective OnStar Module in 2022 GMC Sierra AT4X — Sold in Non-Working Condition
I’m reaching out because my 2022 GMC Sierra 1500 AT4X was sold to me with a non-functional OnStar telecommunications module. OnStar has never connected or worked properly since I purchased the vehicle — the system constantly shows SOS or connection errors.
I repeatedly contacted the dealership that sold me the truck, but they stopped responding entirely. I then took the vehicle to another authorized GMC dealership in town, and they confirmed that the OnStar module itself is defective.
They informed me that I would need to pay $200 just for a diagnostic fee and then $600 for the module replacement, even though the system has never worked since purchase.
This is a factory-installed feature that should have been operational at delivery. I’m requesting OnStar and GM’s assistance in getting this issue resolved properly, without being charged for a defect that existed before I ever took ownership.
2 Replies
Good luck with getting any assistance. Go through theI GM executive team. mary.barra@gm.com. That is the only way you will get help. I purchased a brand new 2025 with a defective Module. Took them 5 months to listen to me. Then they only listened because a GM executive contacted them. Had it replaced one week ago today. This morning it stopped working again. Just filled out the lemon law form.
Our team understands how frustrating it can be when your OnStar Services are not operating as expected in your vehicle. We would be glad to connect with you and your dealership to learn more about these concerns with your Sierra. Please send us a private message to OnStar_Support so we can look into this further. Just select the envelope icon at the top right of your screen to get started.