Unclassified problem on the 1999 Chevrolet Corvette
1 crash 1 injury 2 of the 9 reports for this failure mention a crash, a fire, an injury or a death. Those are the owner's words on the complaint form, not a verified finding, and one report can mention more than one.
Only 1 report 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 unclassified problem gets reported
There are 9 reports of unclassified problem on the 1999 Chevrolet Corvette, 1 with a mileage attached. That is too few to place the failure on the odometer with any confidence.
It is the 37th most-reported problem on this model year.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| — | — | 32,803 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
Of these reports, 1 a crash and 1 an injury are mentioned. Owners write their own complaints and the agency does not verify them, so read this as what the reports say happened rather than as a confirmed count.
The same failure on other years
The same failure is reported on 19 model years of this car. It shows up earliest on the 2015, at a median of 5,000 miles, and latest on the 1998 at 105,000 miles.
By volume the 2005 carries the most reports, with 40; the 1999 has 9. 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.
My 1999 chevrolet corvette has been into a dealer 8 times for the same "column lock" security message which shuts down the fuel line and immobilizes the vehicle. There have been 3 general motors recalls and none have fixed the problem. This shut down can cause the vehicle to shut down at any moment in time potentially causing a fatal accident for me, my family, or someone else. The problem begins with a message "pull key wait ten seconds". After this occurs a few times the "column lock" message comes on and the vehicle shuts down right on the spot. All 7 of the 8 visits have resulted in "band aid" fixes. Gm has not fixed the problem. If you look on line you will see some temporary fixes and identify that this is a major issue with this type of vehicle. Gm has apparently "written off" this problem which dates back to the first recall in 1999. This action can occur when the vehicle is stationary or when you attempt to move the vehicle when you release the clutch. Immediately upon releasing the clutch the engine shuts off because the fuel line is shut down. It happens when the vehicle is first started as well. Personally I have…
Also reported on the 1999 Chevrolet Corvette
Steering column or shaft failure
Other steering problem
Other electrical problem
Other body or interior problem
Control module (ECM/PCM/BCM) failure
Seat belt or retractor failure
How far this goes
This page is kept out of search results because 9 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 9 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 unclassified problem happen on the 1999 Chevrolet Corvette?
Across 1 owner reports that included an odometer reading, half were filed by 35,000 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 unclassified problem on the 1999 Chevrolet Corvette?
9 reports have been filed with NHTSA, about 1.0 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