---------- The backlighting for the radio and the IP cluster may remain on after the delayed lighting feature times out. This may also cause the battery to run down overnight.
------- An internal short in the radio causes a feedback to the lighting circuits.
------------ Remove the radio and send to a Delco Repair Centre. Insure that the condition is clearly noted on the repair tag.
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.