Forum Discussion
Telematics diagnosis
It appears I have the same problem as many others. I purchased a used '22 GMC 1500 AT4. I decided to try the OnStar trial for a few months so I could use the navigation, app on my phone for remote start, etc. After a couple weeks everything quit working. There is no light on the console and no communication at all. The dealer wants a $200 diagnostic fee just to look at it.
Does anyone know how to diagnose that it is in fact the telematics module? If I can confirm that's the problem I will replace it when upgrading the horrific Bose amp/speakers and eliminating the auto stop feature.
The most annoying part about it is that the clock won't automatically update on the infotainment system and loses about 2-3 minutes per day when I manually set it. To be honest, the GM app sucks anyway because you can't adjust climate settings from it. I expected more out of such a new vehicle. I guess that's why everything else in my fleet of cars/trucks is 40+ years old.
2 Replies
2021 GMC 1500 AT4 here. Good luck! It took 2 days for the dealer to diagnose the issue....after the whole "phantom" battery drain that is also attributed to these faulty modules.
My truck has been in the service bay since March 5 with no end in sight. Since these telematics modules are on backorder, various blogs and reputable service and part technicians assure no ETA due to the parts being discontinued and GM "trying" to keep up.
I have called numerous dealerships in California, Iowa, Florida, Texas, Michigan....all tell me the same and almost uncanny rehearsed message..."Parts are on backorder....and we are not sure when they will be fulfilled."
Also, good luck getting any real help with this, as you may only get the torturous reminders from your dealer or GM Customer Care that "We are still experiencing a delay on the part(s) needed to repair...."
But don't you worry! They understand that this is a significant inconvenience and continue working on getting the same template message to you in a week....to assure you....someone is clicking on a keyboard to make sure you feel like you are being helped.
Between the ongoing and numerous electrical issues these branded vehicles are known for and the most recently updated class-actions against GM.... I am now seriously considering moving on.
We regret to learn that you've been struggling with these issues connecting to and taking advantage of our amazing OnStar services in your 2022 GMC Sierra, Chris. Our team recognizes how frustrating it can be to deal with unexpected difficulties with the services that you love and depend on. With this in mind, we'd like to offer an additional layer of support between yourself and your preferred dealership to ensure this matter is appropriately addressed and resolved for you in as timely a manner as possible. If you'd like to move forward with this assistance, we kindly ask that you send us a private message with your contact information, VIN, the current mileage, the name of your dealership, and your availability to bring your GMC into the service department to receive an official diagnosis. To send us a response, just select the envelope icon at the top right of your screen to get started. When creating a new message, please be sure to enter Advisor_Jack to get connected directly to me. Our team will be keeping a close eye on our inbox for your message and hopes to hear from you again very soon. By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement