One problem related to brake disc pads has been reported for the 2003 Chevrolet Suburban. The most recently reported issues are listed below.
Loss of braking power and stopping ability. A certified mechanic told me that this year vehicle had the incorrect braking system installed at manufacture. It is a 5780 pound vehicle (3/4 ton) with 1/2 ton braking system factory installed. On way home from NY state to florida I had less and less stopping power. Brake fluid up to full level. Excessive heat from front wheels. I drove at slower speeds in order to keep a safe distance in front of me in case I needed to stop quickly, which I felt the vehicle could not stop in time to avoid an accident. I have contacted gm to report and ask what can be done. In the interim I have had new rotors and brake pads installed as a stop gap measure. I have been told it is not a permanent fix as the weight of the vehicle requires the 3/4 ton braking system rather than the 1/2 ton system that is on the vehicle. There will be excessive pad and rotor wear as a consequence.