While Chevrolet is working to close out the current model year in the next three weeks, we just got a new service bulletin related to the 2025 Corvette. The update references the 2025 Corvette’s braking system, as well as those in the Cadillac XT4, Chevrolet Equinox, and the GMC Terrain.
GM says the symptoms of the Brake Master Cylinder Replacement include poor braking performance, a limited top speed, and a malfunction indicator light (MIL) on the dashboard. If your 2025 Corvette is exhibiting any of these, it’s time to schedule an appointment with your Chevrolet dealer.
The service update doesn’t say how many 2025 Corvettes and other GM vehicles are affected, but they believe the number is fairly small with just a few vehicles needing to have the brake’s master cylinder replaced.
This update includes the Stingray (base and Z51), E-Ray, and Z06 braking systems while excluding the ZR1’s J58 and J59 brakes. The service update suggests the time involved to replace the master cylinder is 4.2 hours for the Stingray Z51 and 3.2 hours for the base Stingray, E-Ray, and Z06.
Below is the complete service bulletin thanks to our friends at the MidEngineCorvetteForum.com:
Source:
MidEngineCorvetteForum.com
Related:
GM Issues New Service Bulletin for Certain 2024-25 Corvettes with a Door Water Leak
GM Issues Technical Service Bulletin for 2025 Corvettes Over Contaminated Front Lift System
GM Issues Service Bulletin as Some 2025 Corvettes Need Their Body Control Modules Reprogrammed
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I swear… with the engine problems in the SUVs, the 10 speed automatic failures… the on-going issues with the 8 speed automatics and the various vibrations found in the C7. GM better get is stuff together. They were doing SO well back in the late aught’s and now, it’s expensive junk waiting to blow up!
It wasn’t that long ago that the GM full sized SUVs were some of the most durable and long lasting vehicles on the road, today? I wouldn’t touch one. In my opinion, its inexcusable. History is repeating itself… GM getting lazing on building durability and reliability and resting on their recent successes.
My nephew has a 2022 (or so) Chevy Silverado with the new I-6 TDi. In general, it’s a nice truck, but the transmission is already showing signs of failure. And I sure he bought based on my recommendation, which ticks me off even more, because the transmission issues hadn’t shown yet. That makes me feel bad, because he spent big $$ on that, based on my experiences and expectations.
At least our 2012 Escalade has been about perfect!!! Great driveline and 20 MPG on the open highway with excellent comfort and space… lotsa space it’s an ESV! And my 2006 Corvette has been fantastic!!! Love that car. I know it has some long term wear issues that are beginning to show (torque tube), but after 20 years, I can take that. It’s when the car is only two or three years old and the failures show, not so thrilled.
GM:
I can only suggest – as a senior / gray haired engineer – that you reign in T. Roma’s design team and focus on:
1) Increasing the build quality on all your Corvettes immediately;
2) Plan your build / manufacturing cycles that actually delivery ALL confirmed sales to your devoted customers that purchase your corvettes;
3) Stop teasing your customer base with a new ZR1X (ZORA??) when you can’t even deliver the previous purchased ZR1X models. Then to shift the 2025 ZR1X orders to 2026 and add an additional cost of $7K – based on your inability to deliver what are already confirmed orders – well that’s just simply wrong as you are not accepting any responsibility for your shortfalls….
Q: Is this the new GM we have all been reading about??
I live in the EU – and have contacted your new EU importer – to purchase a ZR1X and was told that this cannot happen due to “higher than EU standard emissions” levels.
Sounds like the “big boys here have found a way to keep you out of their backyard sales…
Stop focusing on faster Corvettes for the few and make quality a top priority. My C7 is my last GM car. Have bought 2 Lexus vehicles since and they are awesome.
In full agreement with you CG…and with the marketing / design department far exceeding the sound engineering and testing sequences supposedly in place and proven by past history – T. Roma needs to slow down and get his previous build cycles in order…or their bubble will most assuredly burst…and soon.
The ZR1X looks great…let’s hope it doesn’t end up in endless recalls.
This is obviously a (GM chosen) supplier/part problem because it applies across several GM vehicles. It’s not Corvette specific. Something must have changed at the supplier level. Tony Roma is the wrong guy to attack because he does not control GM procurement. As a “user” of the part, he’s probably as upset about it as you are (if you’re upset). When C8s were having transmission problems, was Tadge taking big hits? Again, that was a supplier problem…
My 2024 Stingray Z51 is the first new car I ever bought that didn’t have to go back to the dealer for ANY “adjustments”. Great performance and quality! There’s no “build quality” to improve.
As far as ZR1 and ZR1X goes, we have seen this movie before… C8 delays in 2020, Z06 delays in 2022, E-Ray delays… Nothing unusual. That’s just normal early production. Be prepared for confusion, delays, hiccups and maybe having to wait to get the first batch of ANY new design. Given time, things settle down.
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