[SWZL11LE]

Recently got my 2022 ZLE, has around 470 miles as of today.

While on my drive back home and merging onto the highway, I felt that the car was lacking a lot of power.

Then I realized that the vehicle was barely making 2-3psi of boost according to the dash. It would sometimes hit the first line after 0 which I assume is 5psi or so.

The belt seems dry, and has plenty of tension.

Then it caught my attention that the S/C Bypass valve was not all the way closed even when the car was off. (the bracket was not resting against the set screw).




I tried to see if it was moving freely by hand and retracting, and it looks like it doesn't always want to go full closed. I assume this is what is happening when I am driving which is causing the car not to be able to generate enough boost.


From what I see on google some bypass valves have an electrical connector to them, while the 2022 ZLE doesn't have any electrical connectors, and only a single vacuum line ?




Anyone else has had similar issues?

[Joshinator99]

There was a discussion about this on the HP Tuners Forum. The tuner was surprised to see a vacuum bypass (like aftermarket superchargers use) on the ‘22 ZL1. Since your car is so new it’s obviously under warranty and should be very simple for the dealer to diagnose and replace.

[SSgtSS1LE]

You can easily fix this yourself without going to the dealership.

Loosen the two bolts and follow instructions below starting at step 11.5.