GM Oil Life System - Resetting
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
This information is no longer published in the service information. This information will be found within Engine Oil Life System in the Owner's Manual. Refer to Category Service and Appearance Care, then Checking Things Under the Hood and then subsection Description and Operation.
You may be able to use the Search information function using the words Oil Life.