Service oil reset Hummer H3

Turn the ignition to run (one position before starting engine).
Press and release the stem in the lower center of the instrument cluster until the OIL LIFE message is displayed.
Once the alternating OIL LIFE and RESET messages appear, press and hold the stem until several beeps sound. This confirms that the oil life system has been reset.
Turn the ignition off and then start the engine to verify the indicator has been reset.

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