Service oil reset Hummer H3

2006-2010
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.

Service oil reset Hummer H2

2003
Turn the ignition to run (one position before starting engine).
Press the fuel information button (located on instrument panel cluster above steering column) until ENGINE OIL LIFE appears in the display.
Press and hold the select button (arrow button) for 5 seconds while ENGINE OIL LIFE is displayed. OIL LIFE RESET will appear on the display for 10 seconds to let you know the system is reset.
Turn the ignition off and then start the engine to verify the indicator has been reset.
2004-2007
Turn the ignition to run (one position before starting engine).
Immediately after step 1 press and release the accelerator pedal 3 times within 5 seconds. If the OIL LIFE RESET message flashes for 10 seconds, the system is resetting.
Turn the ignition off and then start the engine to verify the indicator has been reset.
2008-2010
Turn the ignition to run (one position before starting engine).
Display the OIL LIFE REMAINING on the DIC by pressing the (i) button.
Press and hold the SET/RESET button (check mark button) on the DIC for more than 5 seconds. The oil life will change to 100%.
Turn the ignition off and then start the engine to verify the indicator has been reset.