Driving when entire instrument panel went black. off/on at random. knocking sound started about the same time. took car in to be checked out. was told brake lines were completely rusted, and needed a new transmission. we paid for repair of the instrument panel. talked to our dealership, holman in cincinnati oh, about breaks. no recall listed. they have never told us the brake lines were rusted. offered us $150 brake kit to do ourselves (cant do) or they can do it for $1500-2000. can't afford. it sits in our driveway, epic fail gmc. we bought a honda.
I was traveling on saturday morning, in my dads 2004 yukon luckily it was early enough not much traffic at the time, it was raining and i was not driving very fast normal speed on the highway is 40 miles per hour on us11 because of congestion and traffic lights, i was traveling between 30 and 35 mph because of rain, anyways a light changed and i had time to stop, but the vehicle did not stop the pedal went almost to the floor and the light came on stating brake failure, from that point i slowed down as slow as i could and tried to test the brakes, it would stop, but needed plenty of distance, so i slowed for a turn off, and when i got home, started to brake before entering the driveway so that i would not hit the garage or anything else, in fact i stopped the vehicle at the end of the driveway near the road. *tr
Brake hose in engine compartment developed pinhole leak due to heavy rust. brake pedal went to the floor. brake bleeder screws rusted solid- can't bleed lines after repairs. it appears that inferior quality metal brake lines were used that rust easily. this is a very low mileage vehicle. this is a very common problem with these trucks and gm needs to held accountable, and a recall should be issued as very serious crashes may occur. *tr