Originally Posted by latech
Lots of real bad info here, anthony 600 is the only one who got it close to right.
IIRC it is also in your OWNERS MANUAL.
Turn on the key and before 5 seconds passes, floor the accelerator 3 times and let off. Then turn the key of, then start car to check.
Now that my not be correct for a GM with an oil life index, but It works on most GM junk, so try it first.
The above procedure works on most GM vehicles.
Bring up oil life on the DIC, press and hold the info reset button until it reads 100%