What are the break-in steps for ceramic brakes on a Chevrolet Corvette C8 E-Ray?

Difficulty: Easy (Driving technique only) Safety Warning: You will be doing repeated aggressive braking. Perform this only on dry pavement on a long, low-traffic road (ideally 20+ miles with few intersections) to avoid causing a rear-end collision.

For the C8 E-Ray equipped with the J57 Carbon Ceramic Brakes (CCB), you have two options for bedding (or burnishing) the brakes. The GM factory manual outlines a very aggressive 57-stop procedure designed for track temperatures. However, owners consistently report that if you aren't tracking the car, the factory method is overkill. Instead, a modified "street" bedding procedure works better to provide good bite at room temperature and prevent squealing ¹.

Here is how to do both, depending on how you plan to use the car.

Option 1: The Community "Street-Only" Procedure

If you are strictly driving on the street, you don't need to get the brakes to track temperatures.

1. Initial Mileage: Drive gently for the first 200 miles to wear off any high spots on the pads ².
2. The Heat Cycle: Perform 10 to 12 aggressive stops from 60 mph down to 5–10 mph. Brake hard at about 0.8g (just short of triggering ABS).
3. Pacing: Drive for about 1 minute (roughly 1 mile) between each stop to let the pad material bond to the rotor.
4. Cool Down: After the last stop, drive for at least 5 miles without touching the brakes to let the rotors fully cool and the pad layer cure.

Option 2: The Factory Track Burnishing Procedure

If you plan to track the car, you must follow the official GM procedure to get the brakes up to maximum operating temperature. Use the friction bubble in the Cluster Performance menu to monitor your G-forces ¹.

1. Phase 1 (Medium): Apply the brakes 25 times from 60 mph down to 30 mph at 0.4g. Drive 1 mile between applications. (Note: You can skip this step entirely if the car already has over 200 miles on the brake pads).
2. Phase 2 (Hard): Apply the brakes 20 times from 60 mph down to 15 mph at 0.8g. Drive 1 mile between applications.
3. Phase 3 (Very Hard): Apply the brakes 12 times from 60 mph down to 5 mph at 0.8g. Accelerate as rapidly as possible between these stops without triggering traction control.
4. Cool Down: Drive at 60 mph for about 10 miles without using the brakes at all.

Crucial Rule for Both Methods

You cannot bed these brakes in multiple, separate sessions. The entire goal is to build a uniform, microscopic layer of pad material onto the rotors in one go. If you interrupt the process or do it half-heartedly, you'll end up with a spotty transfer layer, which is exactly what causes the infamous "stuck pig" squeal on carbon ceramic setups ².