what does it mean when the fail safe mode light comes on? on 2006 Chevrolet Silverado 2500 HD

the problem only happens randomly. We are here in Austin and it happened almost when he got to Wichita Falls but has not happened again in 30 days.

1 answer
Could tell me a bit more about your warning light? If it is a warning light, what color is it. If it is a warning message, what exactly does it say and what color is it. I don't see any information about a "fail safe mode" light.