Buick LaCrosse 2017 2018 - Exc eAssist Technology, Buick LaCrosse 2019 - Exc. Buick LaCrosse 2017, 2018 - Exc eAssist Technology. Buick LaCrosse 2019 - Exc. eAssist Technology. For your new braking system to operate at its performance capacity, it is important to 'break-in' the rotors and brake pads.
