Chev cruze 2015 display code 89. have changed oil and service car but 89 re-appears. Tried internet which said do pedal pump and reset on DIC. My DIC does not display the reset function. Only display 3 option between mile and kilometer. does not ask oil life or reset function. I am a pensioner with not so much computer savvy but a lot of logic. Is there anybody better looking and cleverer than me that can pleas assist. Ps tried disconeecting battery for three hour with the hope that some internal battery would run down, which delay the re-appearance by about 15 min of code 89.