General Motors has issued a customer satisfaction program (CSP) for the 2021 model-year Chevy Tahoe, Suburban, Cadillac Escalade, GMC Yukon and Yukon XL full-size SUVs over an issue related to the brake system control module (BSCM).
The problem: in affected vehicles, the BSCM may “set and latch an internal fault in the module’s onboard diagnostics (OBD) bugger.” If an over-the-air update (OTA) is pushed to an OBD module and the customer accepts it through the infotainment system, the update will fail because the presence of the active fault will block the OTA update. The customer may not notice that the OTA update has failed with an error message on the DIC, as this fault will not activate a warning light on the instrument panel and there will be no driver information center (DIC) message.
This fault is also not visible through dealer tools.
The hazards: this problem does not pose an immediate safety risk to the driver or vehicle occupants, although it is obviously ideal for a vehicle to be able to receive and properly install OTA updates.
The fix: dealers are instructed to reprogram the BSCM in affected vehicles. This will allow the vehicle to receive and properly install OTA updates.
Affected components: brake system control module (BSCM).
Affected vehicles:
- 2021 Chevrolet Tahoe
- 2021 Chevrolet Suburban
- 2021 GMC Yukon
- 2021 GMC Yukon XL
- 2021 Cadillac Escalade
Next steps: GM will notify owners of affected vehicles and instruct them to make an appointment with their dealer. Owners who have questions regarding this technical service bulletin can use the contact information below to reach out to a Chevrolet, Cadillac or GMC customer service rep.
Contacts:
- GM CSP number: N202317390
- Chevrolet Customer Service: 1-800-222-1020
- GMC Customer Service: 1-800-462-8782
- Cadillac Customer Service: 1-800-333-4223
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Comments
I’ve heard of TSB’s but not CSP’s. If there is no way for the dealer to test (or the owner to see it on the DIC), is there a website we can plug our VIN’s into? Waiting for GM to notify us (for affected vehicles) could take a long time.
I’m still wondering if all of the other “issues”, for the 2021 Yukon XL are going to happen to mine.
The letters were mailed last November and it should show up in the GM recall check website/owner center.
A CSP is basically a recall for a non-safety and non-emissions issue. Other manufacturers have the same thing: Ford and Nissan calls them CSPs, FCA is a Customer Satisfaction Notification, Honda has Product Update (PUD), Toyota calls them Service Campaigns, etc.
Like a safety recall, the dealer is supposed to check and do the update before delivery or whenever the vehicle is in for service, so it may have been done without you being aware.
Sam, those of us that ordered them & didn’t receive delivery, until “after” November will not receive a letter.
While I realize it’s not a safety hazard issue, according to the article, the dealer has NO way of checking & it doesn’t show on the DIC.
I will check the regular GM Recall website. Thanks!
Now if they could really fix the 8speed transmission instead of telling owners that it’s working as designed and changing fluid I would be very happy
My Family and I just bought a 2021 Suburban. We regretfully didn’t research any recall call issues for this vehicle. We were in a an accident February 3rd 2021. We were T boned in our mini van when another motorist drove through a stop sign. Our mini van was unrepairable and was considered a total loss. We moved in and decided to purchase a Chevrolet Suburban for its size for safety.
The first week, a Break System Failure Warning appeared on the instrument dash and it only allowed the vehicle to travel no more than 43 mph. And the breaking system did not stop like it properly should. The break pedal became stiff and rolls to a stop. This was a scary feeling. We were so disappointed and also felt unsafe and secure in our Suburban.
We took it back to the Certified Chevrolet Dealer and all they can do is reset the system. A week later the the Break System Failure Warning appeared again. We took it back to the Certified Dealer and they said that it couldn’t be fixed. All they can do is reset it every time this happens. Really disappointing, really considering taking it back and getting a purchase contact unwind. We don’t feel safe driving it anymore. Is there really not a fix to this?
2021 Suburban Brake issue. For the 2nd time my brakes came on its own at about 25-28mph in town. Whiplashed the hell out of me. Was like someone stomped on brakes and let go. When you’re not ready for this its a neck ringer..
Calling today. only 6,000 miles
Scott, thanks for sharing and interested in what happened since then? Did you take your vehicle in? I have 2021 also and my brakes did something similar.
We have one of the first 2021 Suburbans; ordered from the factory. After taking delivery back in October, we have had a recurring issue with the AirPlay and Bluetooth connectivity. The main screen and other components have been replaced. The problem continues….headed back to the dealer again…,also very disappointed that the pedals are not adjustable any longer.
This is really sad.
What has happened to Pride in Workmanship, or whatever you want to call it.
I wanted a 2021 GMC Yukon SLT very badly.
Then found out about the years of engine problems with the Active Fuel Management System.
After changing my mind about buying the 2021 Yukon, I found out about the new Dynamic Fuel Management System.
I am now waiting to see how the new Dynamic system is working after the new vehicle owners have driven several thousand miles.