[geaux_tigerss]

I have the exact same experience with my car. 2017 2SS M6. I followed the 1500 mile break in guideline with from the manual.

In first, second, and third gears I've noticed a hesitation or two. One between 5000-5500 and the other around 6000. It's like timing gets pulled for a fraction of a second and then comes back. It does it regardless of drive mode or whether traction or stability control is on or off. Outside temperature is 80 or so, clear and dry. Roads are good. Has done it consistently on premium fuels from many different stations.

It isn't the tires breaking loose (in 3rd? Come on) and it isn't bumping the rev limiter (happens twice and tbh this car isn't so fast that I'm gonna confuse 5000 to 5500 with 6500). This isn't my first fast car or even first camaro.

But wait, there's more. Yesterday morning I got a CEL. Car start bucking and surging like it's got a big cam with a really bad tune. Happens at all RPMs, constant speeds, acceleration, you name it. Idles well tho. Dropped it off at the dealer to fix.

Their first idea is bad camshaft position solenoid. That didn't fix it. Second try is a new ECM. Waiting on that to come in now.

Edit: my signature is a few cars out of date. I'll fix it when I'm not on mobile.