To find out which alternator is in your vehicle, you will actually have to call your local Chevrolet dealer and talk to the part department. Provide them with the VIN and they will be able to tell you which alternator was equipped from the factory, 150 or 170 amp.
I have attached the replacement procedure below for your reference.
Let me know of any questions.
Images (Click to enlarge)
Wednesday, August 3rd, 2022 AT 8:15 AM