The Instrument Panel: Indicators Cluster, U2E Schematic located on Page 80-2 of the Electrical Diagnosis Manual (Section 8A) shows two "CHECK OIL" indicators in the instrument cluster printed circuit. The indicator linking terminal A7 and terminal B15 should be labeled "SECURITY" indicator.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.