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Q:

oxygen sensors on 2001 GMC Yukon Denali

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
how to reset oxygen sensors
(2) Answers
Are you trying to reset the fuel trims? Have you replaced the oxygen sensor(s)? The fuel trims will relearn over time, or can be reset with a scan tool.