How reset oil light GMC C-K Trucks

How do you reset maintenance light, reset service light indicator GMC C-K Trucks. For reset maintenance light and that can be made manually by use button on car dash board.

Reset service light indicator, engine oil life GMC C-K Trucks, oil reset instructions:

year 1999-2000

1. Turn the ignition to run (one position before starting engine).
2. Immediately after Step 1 press and release the gas pedal 3 times within 5 seconds. If the light flashes 2 times the system is reset. If the light comes on and stays on for 5 seconds the system did not reset.
3. Turn the ignition off and then start the engine to verify the indicator has been reset.