Three problems related to brake light on have been reported for the 2005 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 GMC Yukon based on all problems reported for the 2005 Yukon.
After getting full tune up my engine starts ticking when I start my my car after a while of driving the ticking stops car stalls while driving and check engine blinks on and off . Already changed coils from instructed read still get stalling. Brake booster light is on and I have a fuel smell that comes and goes while driving.
(3-17-2015) I was driving my 2005 GMC denali xl, (with under 35000 miles) the brake light comes on, when I go to pull over, I realize my brake pedal bottoms out, I get it to a GMC dealer, they tell me my brake lines are faulty do to bad undercarriage corrosion and rust, and inform me that it may take thousands of dollars just to correct the brake lines, and that other parts or systems may also fail. . . . They also say it's not worth repairing. The vehicle was in maryland up until may 2014, when I relocated to florida, the vehicle was not driven much on a daily bases. . . Mostly on long trips out of town.
My family and I were traveling south on I-95 near colonial heights, auto in front of me made a sudden stop and I slammed on the brakes. The brake pedal went to the floor; no brake warning lights, luckily the car in front proceeded and I missed hitting him by about 3 feet. Made it to the next exit ramp and had very little brakes, using parking brake, and now the warning lights were coming on. Pulled into gas station, big puddle under the vehicle; rear brake line rusted out and blown. This is supposed to be a split braking system, but the front brakes would not hold either. Had the car towed 25 miles back to my home GMC dealer for repairs. They informed me that all of my brake lines needed replacement as they would not hold pressure and were rusted. To replace the brake lines was about $1,500. 00. Due to using the parking brakes damage was also done to the rear rotors and parking brake pads, that was another $300. 00. I've had this vehicle since 2008, it's a weekend or trip driver. Since I've had it has never been driven in snow or on the street until all the salt residue had been washed away. From my research this is a virginia vehicle, not in the salt belt. I also have a 2004 GMC Yukon slt; went under it yesterday and the brake lines are rusted on that too. Funny the fuel lines run next to them but they are not rusted. I will enter that one also in the database, they will surely fail if not replaced.