Which parts fail
Components named in complaints (service brakes, ABS, rotors and pads, parking brake).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2003 Chevrolet Avalanche owners, lightly cleaned up (personal details are redacted by NHTSA).
My son was driving home from ice fishing , on a hilly and curvy road when the brakes failed. He had no brakes at all , he avoid a few tree before smashing into a smaller tree just missing were his friend was seated.the truck has been very well taken care of and was in great condition. I had the truck towed to a Chevy dealer were it has about $5000 dollars in damage. I just glad my son and his didn't get hurt.
The rear brake line burst catastrophically and my brake pedal went to the floor. I was coming up to stopped cars at an intersection and had to swerve into the oncoming lane to avoid rear ending another truck. Luckily there were no cars in the lane at the time. I then had to make a sharp turn into a shopping center parking lot to avoid running through the intersection (which did have traffic). I had zero braking power whatsoever. I tried pushing down the emergency brake and it had no effect ( I later found that the emergency brake lines were frozen in a large chunk of ice near the drivers side rear wheel and would not move). The pickup bed drains down onto the lower frame in this area and that accounted for the ice buildup. I continued through the shopping center parking lot and all I could to was downshift to slow myself down. …
My 17 year old son was on the freeway and the brake pedal travelled all the way to the floor while attempting to stop. The service brake system light came on at the same time. Stopping distance was increased dramatically, by at least double. If there would have been a curve or car in front of him there would have been an accident. Parked the truck until it could be inspected and found a leak under driver side front door. All of the main brake pipes were rusted and fragile. Taking truck to dealership to have all brake pipes replaced with kit mentioned in (TSB) 13-05-22-001. I am very disappointed that GM is fighting a recall by sighting the fact that there are two different brake systems and it is not a safety issue. What if the rusted brake lines for both systems failed. …
Vehicle experienced complete brake failure upon slowing for a traffic light. This was compounded by the downhill orientation of the road surface. Left roadway to avoid collision with tractor-trailer. There was no warning or indication of an impending brake failure. No indication that any part of the braking system was still functioning. It was discovered upon inspection that the brake lines were excessively corroded compared with other body and engine components. Metal composition of brake tubing seems very prone to corrosion. Complete brake line replacement of the entire system is now necessary.
Tl* the contact owns a 2003 Chevrolet Avalanche. While driving at an unknown speed, the brake pedal extended to the floor when it was depressed. The contact discovered that the brake lines near the driver side door were rusted and corroded, and brake fluid had leaked from the vehicle. The contact indicated that the brake lines had been previously replaced on the vehicle due to rusting and corrosion. The manufacturer was not notified of the failure. The VIN was not available. The failure mileage was 150,000.
Driving to work. Dry conditions. Had 4-5 car lengths between me and car in front of me. Car in front of me stopped. I was going about 30-35 MPH. Truck would not stop. ABS did not come on and wheels did not lockup. I rear ended the truck in front of me. It felt like there was no braking power at all. Brake pedal was to the floor. Truck just slowly slowed down. There is definitely a problem with the braking system.
Tl* the contact owns a 2003 Chevrolet Avalanche. While driving 10 MPH and attempting to stop the vehicle, the ABS warning light illuminated. The failure recurred numerous times. The vehicle was towed to an independent mechanic where it was diagnosed that the brake lines needed to be replaced. The vehicle was repaired. The manufacturer was not notified of the failure. The VIN was not available. The failure mileage was 99,000.
It started with the airbag light, but nobody will own up to fixing it, as we moved from pa to fl. Then the brake lines went, all of them, now with the airbag issue the PCM is sending all kinds of stupid codes like the airbag issue is affecting the whole electrical system in the truck.
Tl* the contact owns a 2003 Chevrolet Avalanche.while at a traffic light, the contact could not depress the brake pedal. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The VIN was not available. The approximate failure mileage was 115,000.
Brake line failure: I had a ruptured steel break line failure while applying normal breaking pressure on the pedal. After further inspection of break lines, I found all break lines were rusted and in danger of also rupture.
Related recalls
Service brakes, hydraulic
Certain sport utility vehicles, pickup trucks, and passenger vans fail to comply with the requirements of federal motor vehicle safety standard no. 135, ?passenger car brake systems.? Some of these vehicles were produced with an out-of-specification brake hydro-boost housing relief valve bore.
Remedy: Dealers are to replace the hydro-boost relief valve. The recall began on June 18, 2004. Owners should contact Cadillac at 1-866-982-2339; Chevrolet at 1-800-630-2438; GMC at 1-866-996-9463; or Hummer at 1-866-486-6376.
NHTSA investigations
Brake line corrosion failure
The Office of Defects Investigation (ODI) received Defect Petition DP10-003 on March 2, 2010, requesting the investigation of model year (MY) 2003 Chevrolet Silverado 2500HD 4WD pickup trucks for corrosion failures of the vehicle brake lines.DP10-003 was granted and on March 30, 2010, Preliminary Evaluation PE10-010 was opened on more than six million model year 1999 through 2003 light trucks and sport utility…
Hydraulic pump failres
GM is conducting a recall on all subject vehicles build between May 1999 and October 14, 1999.significant changes were incorporated into production in early October 1999, and vehicles built after that date have lower warranty failure rates.the complaint and warranty data appear to support the effectiveness of these changes.
Parking brake failure
Odi's review of complaint data received since the close of ea04-011 revealed no indication that the investigation should be re-opened.more details can be found in the federal register notice enclosed in the dp05-009 public file.odi reserves the right to reopen the investigation in the future should conditions warrant.
Brake complaints in other Avalanche years
Frequently asked questions
How common are brake problems on the 2003 Chevrolet Avalanche?
NHTSA has 81 complaints about the brakes of the 2003 Chevrolet Avalanche, 40% of the model year's 204 complaints. The component named most often is antilock/traction control/electronic limited slip (4 mentions).
Is there a recall for 2003 Chevrolet Avalanche brake problems?
Yes — NHTSA recall 04V-045 (service brakes, hydraulic, Feb 4, 2004). Recall repairs are free at authorized dealers.
At what mileage do 2003 Chevrolet Avalanche brake problems start?
Half of the complaints with a recorded mileage happened before about 106,000 miles, and 4% before 25,000 miles.
Is it dangerous?
Owners linked 4 crashes, 0 fires and 0 injuries to brakes problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.