Photo: Wikimedia Commons (CC)
Power
0–62 mph (0–100 km/h)
Top speed (201 km/h)
Fuel, maker's test (10.2 L/100 km)
What owners say
Our take, from owner reports
Owner sentiment is overwhelmingly negative, dominated by persistent and varied reliability issues.
8 problems reported (3 very frequent, 5 recurrent) · high confidence
Problems owners report
- Very frequentIntermittent "No-Start" Condition
Car cranks but fails to start, often related to failing crankshaft position sensor (P0336), camshaft position sensor (P0340), or the Passlock security system. The security light may flash, and a common workaround is to leave the key in the "on" position for 10 minutes to reset.
- Very frequentPasslock Anti-Theft System Malfunction
System falsely engages, preventing the car from starting. The security light flashes. Problem becomes more frequent over time.
- Very frequentCooling System Problems
Overheating, stuck thermostats, coolant loss, gurgling in the reservoir, and failing engine coolant temperature sensors causing inaccurate gauges and constant cooling fan operation. Head gasket failure is also mentioned.
+ 5 more issuesShow fewer
- RecurrentElectrical Gremlins & Intermittent Power Loss
Dashboard instruments, power windows, and HVAC blower motor intermittently fail to operate on startup or while driving. Issues are often linked to a failing ignition switch or corroded wiring connections.
- RecurrentPoor Fuel Economy
Reports of progressively worsening consumption, such as 14 L/100 km (16 MPG) in city driving and 10 L/100 km (23 MPG) on the highway, with a noticeable rich-running smell.
- RecurrentTransmission/Harsh Shifting Issues
Harsh shifts, grinding sensation upon initial movement (especially when cold), and transmission entering a "limp" mode. Linked to faulty front engine/transmission mounts, bad Intake Air Temperature (IAT) sensor, or wiring issues at the transaxle connector.
- RecurrentABS Brake System Failure
ABS and brake warning lights illuminate with codes like C1246 (rear channel will not move). Often caused by corrosion in the ABS module connector, located near the windshield washer fluid tank.
- RecurrentAC Blower Motor/Resistor Failure
Blower motor stops working or only works on the highest speed. Replacing the resistor is a common, but often temporary, fix.
The version owners recommend
Insufficient owner data available. No owner discussions compare trims, engines, or model years for recommendation purposes.
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Overall sentiment
Owner sentiment is overwhelmingly negative, dominated by persistent and varied reliability issues. The vehicle is described as a cheap, practical first car or beater, but one that is prone to frequent and often difficult-to-diagnose electrical and mechanical failures. Positive remarks are extremely rare and limited to basic functionality when the car is running. The consensus indicates the Alero is a high-maintenance vehicle in its later years, with owners experiencing frustration over intermittent problems, parts availability concerns, and a general lack of refinement or durability.
Positioning vs competitors
Insufficient owner data available.
Recommended configurations
Insufficient owner data available. No specific configurations are recommended by owners.
General recommendations
Not recommended as a primary or reliable daily driver, especially for those without mechanical aptitude or tolerance for breakdowns. Considered only as a very cheap, short-term beater car with the understanding that significant, ongoing repairs are likely. Before purchase, a thorough inspection by a mechanic familiar with GM N-body platforms (shared with Pontiac Grand Am) is critical, with specific focus on the ignition system, security system, crankshaft/camshaft position sensors, and cooling system. Budget immediately for repairs. Due to the brand's discontinuation, sourcing certain parts may be difficult or expensive. Owners strongly advise having a backup transportation plan.
Remarks
The Chevrolet/Oldsmobile Alero is part of the GM N-body platform, sharing many components and problems with the Pontiac Grand Am. A significant portion of the owner feedback revolves around diagnosing intermittent faults, particularly the no-start conditions, which are a hallmark issue for this generation. The Passlock security system is a notorious point of failure. There is a noted service bulletin (02-07-30-022B) addressing harsh transmission shifts caused by an intermittent connection at the transaxle's 20-way wiring connector, covering models from 2000-2004. Owner discussions suggest that while the cars can run well when properly maintained, they are particularly susceptible to electrical and sensor failures as they age, making them unreliable without diligent upkeep. Analysis based on approximately 24 substantive owner discussions focused on problem diagnosis and repair.
Specifications
Enthusiast code: P90
Not sold in North America: these versions are from other markets.
3.4 i V6
3.4L 6-cylinder · 177 hp · FWD · automatic
Built 1999–2001