Chevrolet’s new 6.7L LS6 V8 that powers the 2027 Stingray, Grand Sport and Grand Sport X has received its first GM service bulletin over concerns of an engine oil leak. The good news is that not every engine is afflicted with the issue and it looks to be a relatively easy fix to correct.
The GM Service Bulletin is number PIP6132 and you can view it here.
If your new LS6-powered 2027 Corvette is showing signs of an oil leak visible from underneath the car, have it inspected. The Service Bulletin notes that the oil will be observed coming from between the oil pan and the oil cooler adapter. There may also be signs of bubbling in this area when the engine is running.
The Service Bulletin included several photos that illustrate the visible oil leak:
The fix for this issue is to replace the two oil cooler adapter seals, and its not necessary to separate the oil cooler from the oil cooler adapter for access.
One that is completed, the technician then reinstalls the oil cooler adapter, and then properly runs down the four mounting bolts evenly and ensuring they are tightened in sequence.
GM doesn’t provide the amount of time estimated for the fix but based on the instructions it looks to be a pretty quick job for a competent GM certified technician.
The new LS6’s 535 horsepower and its 520 lb-ft of torque has earned it the “Torque Monster” nickname. Based on current production numbers, GM has already delivered 7,180 Corvettes for 2027 with the Gen-VI small block.
Source:
AutoEvolution.com
Related:
New GM TechLink Article Highlights an Issue over the DCT Transmission in C8 Corvette E-Rays
GM is Making C8 Corvette Transmission Repairs Possible with New Parts Available
GM Issues New Service Bulletin for the 2025 Corvette’s Braking System
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![[VIDEO] Former Top Gear/Grand Tour Presenter Richard Hammond Reviews the Brit-Spec C8 Corvette Z06](https://www.corvetteblogger.com/images/content/uploads/2026/10/102226_6-218x150.jpg "[VIDEO] Former Top Gear/Grand Tour Presenter Richard Hammond Reviews the Brit-Spec C8 Corvette Z06")
Hey everybody, am I the only Corvette Fanatic that is very surprised, and just a bit disappointed now, by an oil leak service bulletin already for 2027 Stingray and Grand Sport Corvettes?
What in the Hell are all of the Captured Test Fleet Corvettes doing after all of the Chevy guys stop driving them to Carlisle, Bowling Green and all over Detroit and Michigan, without a very comprehensive inspection, tear-down, testing and diagnosis by those Engineers back in June or July. Hopefully they would find a minor oil leak in a new LS6 a few months ago.
Do these CTF Corvettes just get sold at auction to a lucky dealer, without any inspections?
And now according to this and another post by Keith, there are
2027 Corvette Production:
• 3,691 – Stingray
• 1,293 – Z06
• 3,204 – Grand Sport
• 285 – Grand Sport X
So, about 7,180 or more, new 2027 Stingray and Grand Sport Corvettes need a local dealer service to replace two o-rings, done by their technician. To stop an oil leak that should have been found in all of the LS6 engines within the captured test fleet months ago, by the Corvette Team engineers after driving thousands of miles.
But as usual, the Corvette is just another vehicle sold by Chevrolet.
And now 7,180+ Corvettes have an oil leak.
Hey there Josh, what’s next for 2027 Corvettes, a gas leak at the filler tube if you go past the 1st click off at the pump?
What a shame for those early 2027 Stingray and Grand Sport owners needing to go in for a service repair already.
Corvettes Rule – but mostly the first through the seventh Generations.
Jeff, all 1st year introductions have teething problems. I’m glad it’s coming out now for 2027 MY. Hopefully that means less issues for the 2028 AE cars.
Don’t forget to add the time needed for the tech to take a test drive, making several 3 digit pulls!
Here we go again. Quality is job one. Oh I forgot that’s Ford.
More gm junk. No surprise here that this has already happened. When you are a garbage company and build garbage products, you can expect stuff like this to happen.
Not all cars are impacted. Everything has a manufacturing tolerance, everything has an error rate. You know that there were 162 TSB’s issued for the 2020 model year alone…?
i hope this means any new C8s leaving the factory already have this issue rectified.
Look very few have had the issue. Even with all the testing in the world it judt takes one person or one torque wrench get out of calibration for a short time.
This is the least of what you should make a fuss about. This is not even likely a first year issue just a calibration or supplier issue.
Jeff Thomas, fir your knowledge, Ford, Dodgers, GM, Toyota, Honda, Nissan, Jeep, BMW & Mercedes. All Manufacturers has recalls & issues more than you would imagine. That’s just how things are & have always been. Perfection is what we all strive for but unfortunately we are only human. Although our achievements are & have been great, we will continue to strive to be better. Thanks to all for your sacrifices, hard work & time sacrificed away from your families at times. It does not go unnoticed, as we do appreciate every thing very much.
An easy fix huh. So that means your new Vette WON’T be sitting at the dealership for 6 months.