Onstar Module Replacement ETA?

Update: After 7 months (over 25% of the time I've owned my 2023 Sierra 1500), the OnStar Telematics Module was replaced yesterday (30-April-2025). The local dealership was not able to extend my 36 month subscription like the OnStar representative told them they could when I first took the truck in to address the issue when I was able to get the first available service appointment back in November. 

When I used the OnStar button in the truck to activate the new module, I spoke with Ronda. She was the FIRST and ONLY person from OnStar who seemed genuinely concerned about my customer service experience, but was limited in what she could do to assist in extending my contract for the months of lost service due to lack of parts availability. The issue had to be escalated to a department that had already left for the day.

Not all of the features reliant on the telematics module were immediately available upon activation. During my hour drive home from the dealership, vehicle features reliant on the OnStar system slowly came back online. This was NOT my experience with these same systems when I had originally purchased the truck and activated OnStar.

As for the issue with coming out to the truck and finding it DEAD one day, the service department believes this was due to the original faulty telematics module. Time will tell if the replacement and software patch fixes this issue.

For a vehicle with so many systems designed around the OnStar telematics module, a lack of replacement parts or any transparency about when they can be expected should they fail, I really don't have much faith in GM products any longer. The OnStar system has a LOT of potential, but all this is overshadowed by its lack of reliability. This is especially troublesome for a system that claims to be there for drivers in emergency situations when they may be incapacitated.

For others in this situation, I hope you have a better, more rapid resolution experience than I did. When it's time to purchase your next vehicle, think back to how you were treated and if GM made you feel like you were a valued customer. If everyone at GM and OnStar acted like Ronda, I wouldn't hesitate to come back to the brand, but she was the exception rather than the standard.

I have become one of the casualties of the Onstar Module.  I booked an appointment at my GMC dealership for an oil change and recall software update to my 2022 GMC Sierra Denali 1500.  Several days before my appointment, I noted my truck connectivity via the Onstar system had stopped.  The dealer noted the issue and began the oil change and the software update.  Apparently during the software update,  the ability of the computer system not to be able to communicate with the Onstar Module made the truck computer system that deals with all the safety systems, four wheel drive, etc., to illuminate all dash warning lights and many of the systems to stop functioning.  The dealer informed me they believe the problem can be corrected with a new Onstar Module.  However, there is no ETA on a replacement.  My truck is now un-usable and sitting at the dealership.  What is being done to solve this repair part problem?  

I guess I get to join this group of upset customers, my 23 Yukon Denali on-star module went out as well.  Dealer is telling me 4-6 months.  The motor spun a Rod at 800 miles and was in the dealer for 6 months waiting on an engine.  I paid for 3 years of on-star service when I bought the vehicle.   So I guess on-star gets 1 year of free money, and I get screwed out of 1 year of on-star. 

I’ve been driving Yukons for over 10 years, and my 2023 Yukon, purchased new, started to lose time on the onboard clock, not display the speed limit, and not connect to the MyGMC app 8 months ago.  I discussed all these issues with the dealer’s service department during 3 separate service visits and was told that perhaps the system would re-set itself.  After having the Serial Data Gateway Module recall completed, and told again that perhaps that would address the various problems, which it did not, I finally called the 1800 number in the GMC app.  They diagnosed that my Onstar system was not working and was offline for 8 months and at the time the car had 19k miles and the dealer needed to check the problem.  The dealer found the Onstar Module was not working and needs to be replaced.  The part is on a national back order with no ETA.  Very disappointing to have a wide spread problem that apparently isn’t part of any check list or isn’t easily diagnosed.  Then having the part not available and not communicating resolution timing is completely unacceptable.  It is fortunate that I made the call and figured out the problem 4k miles before the warranty ran out - although perhaps that was the plan all along - avoid detection and maintain back orders until warranties expire.  For a $75k automobile, I expect higher quality service and response.  It is also awful that Onstar has not delivered service to me for a third of the time that I have contracted with them.

Thanks everyone for all your replies and support. I did receive a call this morning 16 January from the Service Dept. of my designated GMC Dealership regarding the OnStar module replacement and I am schedule for installment on next week.  Will keep you all posted of the outcome. My prayers and support to all of those still waiting for their OnStar module replacement to be resolve.

Add me to the list! 2024 GMC Acadia Denali with SuperCruise. Paid thousands extra for this option and the Onstar or "Telematic" module is out. No ETA, all I get from two dealerships is "Back Ordered." We have had 80 vehicles, all but 5 were GM. It may be time to try another manufacturer.

About 3 months. I finally got some time to call OnStar and was told I'm still under the trial period in which before this issue, i was impress the OnStar options I have on vehicle.  So, I sign in to website and elected to extend the period. According to the sales tech, once my trial period is over, I will have the option to cancel.  On 30 Dec, I stop by the Dealership GMC Legacy, Slidell LA to see what was the latest status. There still waiting for the part to come in. In meantime, my Onstar is not working and I believe there is hidden cost I'm currently paying for its services. My engine light remains on and I'm not sure what my next step will be. I always expected better of GMC in doing the right thing and hope this can be resolved soon. Family of GMC owners for decades. The dealership has been supportive and has made it clear they're waiting on the part. I don't know what my options are other than waiting at this point, but I am leaning more to contacting a friend of mine (Congressman). As a Retired Vet, I have patience, but 90 days plus is a bit much driving a 2023 Ultimate 1500 Series with the engine light on.  From my understanding, these parts are coming from a 3rd party which is currently back log.

How long are people waiting to get a new OnStar module? 

I have a 2023 GMC Sierra 1500 AT4X. My truck has under 11,000 miles and it needs a new OnStar Module. My truck is scheduled to go in to the dealership on 12/12/24. I have been without all the functions that rely on the OnStar module to function since 10/15/24. The dealerships in my area are out months to try to get an appointment. Aside from wanting to know when the ETA of the new modules will be, I'd like to know if Onstar is going to credit us back the downtime we have experienced because of faulty modules? I don't think we should pay for services that we can't use because we cant get the problem fixed expeditiously due to OnStar and GM not having the part. Like I said, even if the part was readily available I'd still be waiting two months to get the part installed because dealership appointments are eight plus weeks out. Again, we continue to pay for a service that we can use for reasons beyond our control. So what are you going to do OnStar? 

I also am having the same issue on my 2023 Denali Ultimate. My engine light is on and code from dealership is saying its my OnStar module. The dealership stated there is no estimated time for receiving a new module. It is very frustrating to pay for these services and not have access to them. I would hope GM would make this right.