2007 GMC Savana Van Owner's Manual - Page 177

If the light stays on, or comes on when you're driving, your vehicle needs service. If the regular brake system warning light isn't on, you still have brakes, but you don't have anti-lock brakes. If the regular brake system warning light is also on, you don't have anti-lock brakes and there's a problem with your regular brakes. See Brake System Warning Light on page 175 for more information. The anti-lock brake system warning light should come on briefly when you turn the ignition key to RUN. If the light doesn't come on then, have it fixed so it will be ready to warn you if there is a problem. For more information, see StabiliTrak® System on page 235. You will hear three chimes if the light turns on and one chime if the light turns off. StabiliTrak® Indicator Light If you have the StabiliTrak® system, this light will be on or flashing, according to the description table for the StabiliTrak® system. For more information, see StabiliTrak® System on page 235. You will hear three chimes if the light turns on and one chime if the light turns off. If this light remains on steady, your vehicle needs to be taken in for service. StabiliTrak® Not Ready Light If your vehicle has the StabiliTrak® system, this light will come on according to the description table for the StabiliTrak® system. 177