GM Service Manual Online
For 1990-2009 cars only

Object Number: 812700  Size: A1

When you turn the key to ON or START, this light will come on briefly to show that the generator and battery charging systems are working properly.

If this light stays on, you need service and you should take your vehicle to the dealer at once. To save your battery until you get there, turn off all accessories. See DIC Warnings and Messages for more information.