Parking brake failure on the 2003 Chevrolet Avalanche
Only 5 reports for this mode came with an odometer reading, which is too few for percentiles to mean anything. The page is here because someone linked to it; treat the figures as anecdotes, and see the full report for this year instead.
When parking brake failure gets reported
There are 7 reports of parking brake failure on the 2003 Chevrolet Avalanche, 5 with a mileage attached. That is too few to place the failure on the odometer with any confidence.
A part like this is normally expected to survive 88,000 miles. It is the 8th most-reported problem on this model year.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| — | — | 140,000 miles | — | — |
Read the 10th percentile as “one report in ten arrived this early”. Exact figures are shown in this table because it is the table of record; everywhere else on the site they are rounded to the precision the sample can carry.
What a percentile can and cannot tell you here
These five numbers describe the readings owners gave, in order. The median is the middle one: half the reports arrived below it. The 10th and 90th are the edges of the bulk of the distribution, and the distance between them is the part worth reading. A tight spread — say 70,000 to 95,000 miles — points at something that wears out on a schedule, and the schedule is knowable. A wide one, 20,000 to 190,000, points at a fault that hits some cars and never troubles others, which means the mileage on the listing in front of you tells you very little about your odds.
What these figures are not is a survival curve. Every reading here comes from a car whose owner filed a complaint, so the sample contains only failures: it cannot say what share of the fleet made it past 150,000 miles untouched, because those owners had nothing to report. Nor is the mileage the moment of failure — it is the odometer reading as recalled at the time of filing, which may be weeks later and is sometimes rounded to the nearest ten thousand by the person typing it.
Percentiles are shown at all only once 8 readings exist for the vehicle and mode. Below that the middle of a handful of numbers is noise wearing a decimal point, so the figures are withheld rather than dressed up.
What happens, and what it costs
Putting it right typically runs $250–$1,300 at an independent US shop. That range is an editorial estimate held in this site's failure-mode catalogue, not a figure from NHTSA, and it is a repair cost rather than a diagnosis cost.
The same failure on other years
The same failure is reported on 3 model years of this car. It shows up earliest on the 2002, at a median of 32,500 miles, and latest on the 2003 at 140,000 miles.
By volume the 2002 carries the most reports, with 39; the 2003 has 7. A mode that appears across most years of a model is usually a design choice rather than a bad batch.
If one year stands out to the left, that is the year to avoid; if the whole line sits at a similar mileage, this is wear rather than a defect in one production run.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The mileage is the one the owner gave.
Premature wear of emergency brakes on a 2003 chevrolet avanlanche 1500. The brake is not used and the service people could not explain why the brakes wore out. My regular brakes just at 28700 miles just needed to be replaced in the back but not the front. The front brakes are almost like new. Even the service manager said that it did not seem right. Gm just says nothing they will do. It cost me about $150 dollars(required for inspection) to fix those emergency brakes and I believe there is a defect in the system that allowed the brakes to wear out. They should not have any wear as emergency brakes. Gm said they had a lot of complaints but they could not explain it either. Can you help me and investigate this problem? Basically I was told by gm that they are aware of the problem but don't know what is causing it. So maybe I shouldn't use the emergency brake at all. Since they can't prove what's wrong they won't help me. Sounds like an excuse not to fix what's wrong. Maybe it's just a way of causing the owners of these vehicles to pay more at service/inspection time. A scam!*ak
I was driving at a speed of 50 MPH approaching stopped traffic, when I applied the brakes, the brake peddle went to the floor and the vehicle do not slow down. The brake light came and I applied the emergency brake to slow to a stop. I then had the vehicle towed to a repair shop where they told me that all four of the brake linings were rusted through. I hunt and fish with this vehicle and go off road a lot, this is why I purchased this vehicle in the first place. To have a off road vehicle manufactured with brake linings that rust through is criminal. *tr
At a stop light, with the brakes applied, a loss of pressure was felt. Letting off and reapplying the brakes lead to the brake pedal traveling to the floor / front of driver cab. At the point there was no braking pressure felt and the truck began to travel at idle speed into the intersection. Two failed attempts at applying the brakes lead to the brake warning light going off, after the initial failure. Applying the parking brake yield similar / failed results. The truck was safely steered into a parking lot and put in park to bring the vehicle to a rest. The engine was turned off and let rest a period of 5 minutes and then turned on and brakes tested while in park. No break pressure was felt at the pedal. Brake fluid was observed under the drivers side front portion of the truck. No bystander injuries or property damage occurred. Aside from the driver, a fourteen month old was the only other occupant, neither sustained any injuries. *tr
Also reported on the 2003 Chevrolet Avalanche
Loss of braking
Instrument cluster or gauge failure
Other brake problem
Brake line, hose or caliper failure
Other electrical problem
Other speed control problem
How far this goes
This page is kept out of search results because 7 reports is not enough to publish percentiles from. It stays reachable because somebody looking at this exact car would rather see the reports than be told there are none.
Complaints are voluntary, so 7 is a floor and not a count of affected cars. Mileages are typed in by owners and cluster on round numbers. And the mode itself is assigned by software reading the complaint text, which is reliable in bulk and fallible one report at a time.
Questions this page answers
At what mileage does parking brake failure happen on the 2003 Chevrolet Avalanche?
Across 5 owner reports that included an odometer reading, half were filed by 140,000 miles. A quarter were filed before — and a quarter after —. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is parking brake failure on the 2003 Chevrolet Avalanche?
7 reports have been filed with NHTSA, about 0.1 per 1,000 vehicles. Complaints are voluntary, so this is a floor rather than a count of affected cars.
What this is and is not. These are the mileages at which owners chose to complain to a federal agency, which is not the same as the mileage at which the part fails on every car. It skews toward failures that happened outside warranty, cost real money, or frightened someone. It is still the only public dataset that carries failure mileage at all, and the shape of a few hundred readings is informative even when a single one is not. Methodology · JSON · this failure on other cars
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed