Ten problems related to service brakes have been reported for the 2003 GMC Sierra. The most recently reported issues are listed below.
Exiting off freeway ramp in indianapolis brake pedal went to the floor without notice and no brake fluid loss, nearly crashed crossing 5 lanes of cross traffic just lucky I wasn't broadsided by cross traffic. I received no notice of hazard from gm, no recall and only learned of this problem once researching on web. I am lucky to be alive.
Abs activates (noticed by pulsing brake peddle) when moving slowly to a stop on dry clean pavement. Occurs randomly when slowly coming to a stop.
As I applied the brakes, the brake pedal went to the floor and my vehicle did not stop. Thankfully there were no cars coming as I went through the stop sign. My brake indicator lights came on the dash. I was able to limp the truck back the 1. 5 miles to my house. Now I am learning that this has been a common problem with the GMC's. I have taken it to a shop and they have informed me that all the lines are rusted and brittle!.
Due to corrosion the brakes line burst causing a complete braking failure - no warning lamps illuminated!!! the lines corroded completely in the holders which attach to the vehicles frame. Under moderate stopping pressure the lines burst! all metal lines need to be replaced from the front of the vehicle to the rear. Truck has never been exposed to extreme weather or salt while in my ownership. This is completely and utterly unacceptable.
Going down the road pulling a trailer, went to brake and the brakes went to the floor. Ended up having to use the trailer brakes to stop.
: the contact stated while depressing the brake pedal at 30mph or less, the vehicle sometimes requires an extended stopping distance and the brake pedal goes to the floor. As a result, the stopping distance was increased to avoid possible collisions. The vehicle was taken to the dealer numerous times for inspection. The dealer determined the vehicle was operating normally and no repairs were made.
My 2003 GMC Sierra 1500 has a "clunking" sound, coming from the steering column, when I turn the steering wheel while the vehicle is moving. Also, my front brakes have a "rubbing sound" and the peddle gets "spongy" when I activate the brakes at a low speed.
Must apply great amount of pedal effort to stop, pedal feels like sponge, auto dealer says there`s no problem, also dealer says recall #04004 dosn`t apply to my truck.
I got a new 2003 GMC Sierra 1500 the front bumper start to show rust in under 4000 miles then I got oil change the mechanic call me and told me that my brake are solid rust both front ones the frame is rusting all over the place at 10000 the steering column knuckle near the steering box is solid rust and he says it is very dangerous to have that rusted so bad I have sent 4 emails to GMC about it and go to marina GMC in san leandro where I got it from they told me that all of them are rusting and they not going to do any thing about it.
Problems with GMC truck being compatible with RV trailers. Trailer brakes may lock up randomly for no apparent reason, or trailer brakes may not work at all even though their trailing load is wired to as prescribed on the 7-pin trailer connector dust cap. . The electric trailer brakes may not work if the headlamps or park lamp are turned off.