On a small block Chevrolet, the casting number is found at the rear of the block on the driver's side (as is with Chevy's big block engines). The engine ID code stamping is located on a flat pad in front of the passenger side cylinder head (big blocks can be in the same location...
Chevy releases new calibrations (software patches) for their cars, classically these have been to adjust things like engine timing. However, in an EV these updates adjust things like DCFC charging curves. 20-NA-053 is a service bulletin for all 2017-2019 Chevy Bolt's released by GM to ...