Two problems related to fuel hoses lines/piping and fittings have been reported for the 2003 Chevrolet 1500. The most recently reported issues are listed below.
I approached an intersection where my traffic light signal was red and I had sudden loss of braking in my 2003 silverado c1500, with no prior indication or warning lights. The brake pedal went very low and I could not stop my vehicle before entering the intersection. I steered to the right of two waiting cars in front of me and came to a stop in the intersection beyond the light. Fortunately there were no vehicles coming at that moment on the 4 lane highway crossroad so a crash was avoided. All of the brake and fuel lines were inspected after the incident and found to be heavily corroded (rusted), with the rear brake line leaking about 2 inches from where it exits the abs unit under the cab. The master cylinder fluid level was normal and there were never any previous leaks, warning lights, or problems like this and I am the original vehicle owner. The visible level of corrosion seems extreme on the brake and fuel lines on this vehicle. Had I been in an accident, I would be concerned that fuel lines could also leak and increase the likelihood of a fire due to their likewise poor condition due to extreme rust.
Upon starting the vehicle and depressing the brakes, the brakes went to the floor. Upon inspection from a mechanic, it was noted that both brake lines were rotted (one was rotted all the way through causing the fluid to leak from the line). We were also told that the gas line and caliper had severe rotting. Upon my research, this seems to be a very common problem with Chevrolet trucks. I hope this will be resolved so additional Chevrolet owners do not have severe accidents due to these issues. My husband and 4 year old son had to walk quite a few miles in 95 degree weather! this is a safety issue and I hope my complaint will help further the investigation.