Four problems related to brake light on have been reported for the 2004 GMC Sierra. The most recently reported issues are listed below.
Driving on west stone drive kingsport, TN, a vehicle cut me off trying to get thru a traffic light, I locked my brakes down hard as I could, I could feel the abs system working, I was able to stop about 12 inches from the other vehicle. When I pulled out after the light changed to green, I was traveling down a slight grade, depressing my brake pedal lightly, the pedal went all way to the floor board. . I took the truck to a local shop to have it checked, one of the brake lines behind left front wheel had ruptured. When the mechanic started the repairs, he called said all lines on this truck were extremely rusty, (he asked what I wanted to do) I said fix it right. In making the repairs all lines were replaced. . I have pictures of all lines that can be sent. I also have all of the brake lines that can be looked at and or analized.
Tl- the contact owns a 2004 GMC Sierra denali. The contact stated while traveling approximately 5 mph, the brake pedal was able to be fully depressed and the brake warning light illuminated. The vehicle was towed to the dealer where it was found that the brake lines were corroded. The contact also mentioned that the failure was experienced twice. The vehicle was being repaired. The manufacturer was contacted about the failure. The failure mileage was approximately 86,000. Rvk.
I have a 2004 GMC Sierra that has an electrical issue with the abs or brake system. The brake light, abs light and service brake system light goes off at random times. Might have something to do with the air conditioning because the a/c draws power from the battery and I can see that a certain level the indicators go off. Most of the time the lights chime and blink when I apply the brake but it also has happened when just turned the truck on. I've replaced the rotors and pads to still have the problem. I'm not sure if it's a ground or sensor that is failing. I've found TSB for regrounding, failing sensors, or ecbm. Still haven't found the correct diagnosis. I just hope the abs functions when I need it.
While driving abs brake light appeared on the dashboard intermittently. Consumer contacted dealer, but problem still occurs.