My injection pump just failed because, the dealer says, water in the fuel. The diesel supplement manual with the truck says that the float switch in the filter/separator should activate a light in the message center. I have had problems with the truck before and found a little water in the filter, but the light has never come on. Has anyone ever seen this light? My bill so far is $2300, if the injectors don't need replacing and GM won't pay. I saw alot of posts on other forums today with the same problem- one guy with a bill over $7400. Seems like if water is so detrimental to the pump, they should have a better system to protect it and when it fails, should be their problem. Water will inevitably get in your tank. They say to sue the gas station, but if you buy fuel from a few different stations, how can you prove which one gave you the water?