5th generation · GM N-body (GMX130) · 4,546 complaints, 2,401 with mileage
Owners filed 4,546 complaints with NHTSA about the 1999–2005 Pontiac Grand Am, and 2,401 of them record the mileage at which the failure happened. That is enough to show not just what fails, but when.
Failures are spread across the mileage range, with the middle half between 43,000 and 103,185 miles. The median is 70,000 miles.
The most-reported areas are the electrical system (22.3% of complaints, typically around 83,031 miles), the exterior lighting (13.5% of complaints, typically around 69,240 miles), the hydraulic brake circuit (11.5% of complaints, typically around 37,000 miles).
1 recall campaign cover this generation.
| System | Complaints | Share | Typical mileage | Middle half |
|---|---|---|---|---|
| Electrical System | 1,016 | 22.3% | 83,031 | 53,345–118,000 |
| Exterior Lighting | 614 | 13.5% | 69,240 | 47,000–99,800 |
| Service Brakes, Hydraulic | 521 | 11.5% | 37,000 | 18,000–57,000 |
| Engine And Engine Cooling | 427 | 9.4% | 59,996 | 43,000–80,000 |
| Visibility | 231 | 5.1% | 62,000 | 38,500–90,000 |
| Steering | 197 | 4.3% | 75,932 | 31,655–111,312 |
| Air Bags | 195 | 4.3% | 84,500 | 56,000–139,000 |
| Suspension | 194 | 4.3% | 67,285 | 40,000–89,993 |
| Structure | 136 | 3.0% | 70,000 | 37,000–114,000 |
| Fuel System, Gasoline | 130 | 2.9% | 62,000 | 40,000–85,085 |
| Year | Complaints | With mileage |
|---|---|---|
| 1999 | 1,318 | 397 |
| 2000 | 939 | 436 |
| 2001 | 759 | 479 |
| 2002 | 549 | 367 |
| 2003 | 436 | 307 |
| 2004 | 402 | 298 |
| 2005 | 143 | 117 |
Complaints about this generation are not spread evenly across the vehicle, and the systems that generate the most of them do not all fail at the same point in a car's life. The median failure across all systems here is 70,000 miles; the figures below show which parts of the car run ahead of that and which run behind.
The electrical system accounts for 22.3% of complaints (1,016 reports, 664 of them with a mileage figure), with a median of 83,031 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 53,345 and 118,000 miles.
The exterior lighting accounts for 13.5% of complaints (614 reports, 382 of them with a mileage figure), with a median of 69,240 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 47,000 and 99,800 miles.
The hydraulic brake circuit accounts for 11.5% of complaints (521 reports, 145 of them with a mileage figure), and it fails early — a median of 37,000 miles, well before the vehicle's overall median. Failures clustered this far below the rest of the car usually point to a design or manufacturing problem rather than wear, because wear does not selectively target one system on low-mileage examples. The middle half of these reports falls between 18,000 and 57,000 miles.
The engine and its cooling system accounts for 9.4% of complaints (427 reports, 246 of them with a mileage figure), with a median of 59,996 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 43,000 and 80,000 miles.
Visibility equipment accounts for 5.1% of complaints (231 reports, 102 of them with a mileage figure), with a median of 62,000 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 38,500 and 90,000 miles.
The steering accounts for 4.3% of complaints (197 reports, 91 of them with a mileage figure), with a median of 75,932 miles, close to the vehicle's overall pattern. The middle half of these reports falls between 31,655 and 111,312 miles.
Within this generation, complaint volume is not constant across model years. The 1999 model year drew the most — 1,318 complaints — while 2005 drew the fewest at 143. The median year sits at 549.
That makes 1999 an outlier: roughly 2.4 times the median year of this generation. A single year standing that far apart usually reflects either a first-year issue that was later corrected, or a component change introduced for that year. Anyone shopping this generation has a straightforward reason to prefer a different year, all else being equal.
NHTSA records 1 recall campaign covering vehicles in this generation. A recall means the manufacturer or the regulator concluded there was a safety defect or a standard was not met, and that a free remedy is owed to owners — including second and later owners.
Recall status is specific to the individual vehicle, not the model. Checking a VIN against NHTSA's lookup is free and takes under a minute, and it is the only way to know whether a particular car has had the work done.
Of the 4,546 complaints filed against this generation, 325 reported a crash; 64 reported a fire; 288 reported an injury; 48 reported a fatality. Crash-involved reports represent 7.1% of the total.
These are owner-reported outcomes, not verified investigations, and they are not adjusted for how many of these vehicles are on the road. They are included because the distinction between a fault that strands a car and a fault that causes a collision is the one that matters most, and it is not visible in a complaint count alone.
For a buyer, failures on this generation are spread rather than concentrated: the middle half falls between 43,000 and 103,185 miles, with a median of 70,000. There is no single mileage threshold to watch, which means condition and maintenance records are more informative than the odometer.
On inspection, the electrical system and the exterior lighting are where this generation's reports concentrate, so those are the areas worth a specific look. The exterior lighting in particular shows a median failure mileage of 69,240, which gives a concrete number to compare against the odometer of any car you are considering.
None of this is a substitute for a pre-purchase inspection on the individual car. Aggregate patterns describe a population; the example in front of you has its own history.
3.4L LA1 V6 lower intake manifold gasket failure: the gasket carrier and sealing beads deteriorate, letting coolant into the lifter valley and oil, or leaking externally at the head-to-block junction. Frequently escalates to overheating and secondary head gasket failure if not caught. Same failure family as the GM Dex-Cool 3.1L/3.4L class action.
2.4L LD9 head gasket failure and coolant loss; the LD9 was dropped after 2001 in favor of the 2.2L Ecotec.
Passlock II theft-deterrent no-start: the ignition-cylinder Hall-effect sensor degrades, the BCM disables fuel, and the car cranks but will not start until a 10-30 minute relearn.
Front rotor thickness variation / warping producing pedal pulsation, a high-frequency owner complaint on this platform.
| Campaign | Date | Component |
|---|---|---|
| 14V400000 | 2014-09-08 | Electrical System:Ignition |