2003 Chevrolet Impala — Known Issues & Recalls

Your car is shutting off unexpectedly while you're driving, with no warning signs or error codes appearing. This happened on the highway at 60 mph, which created a dangerous situation for you and other drivers. The unpredictability of when this will occur makes it a serious safety concern. The fix will likely involve diagnosing the electrical system to find what's causing the engine to lose power, which may require replacing a faulty alternator, battery, or engine control module.

Your car's Passlock security system has failed, which completely disables your vehicle's electrical system and prevents you from starting the car or opening the trunk. Even disconnecting the battery only provides temporary relief before the problem returns. The owner reports that diagnostic and repair costs are very expensive, and this issue affects many GM vehicle models across decades.

When you turned the key to start your car after it sat parked for 2 days, you heard a loud bang like a gunshot and white smoke came from under the hood. The plastic intake manifold gasket had exploded into pieces and blown apart. The repair will likely require replacing the intake manifold gasket and possibly the manifold itself.

Your fuel line is leaking gasoline underneath the engine. This is a fuel system problem that needs prompt attention since gas leaks are a safety hazard. A mechanic will need to inspect the fuel line for cracks or damage and replace any compromised sections.

Your accelerator pedal keeps getting stuck when you're at traffic lights and while driving. This can cause your car to unexpectedly speed up, which is a safety concern. The issue may be related to the accelerator mechanism or throttle control system, and you should have a mechanic inspect and repair the stuck pedal right away.

While using cruise control at 58 mph, you rapidly pressed the accelerate button 4-6 times in quick succession. Your car's engine responded as if you had floored the accelerator, the transmission downshifted, and the car accelerated to 70+ mph and kept climbing past 85 mph with the throttle wide open. Pressing the brake pedal and turning off cruise control didn't stop the acceleration. You had to shift to neutral and turn off the ignition to regain control. When you restarted the engine, it revved out of control again until you disconnected the battery for several minutes. The throttle body appeared to be in the idle position despite the wide-open throttle behavior, suggesting an electronic control issue rather than a mechanical cable problem. The fix will likely require a diagnostic scan of the engine control computer and possibly a software update or replacement of the throttle control module.

Your vehicle caught fire while driving at highway speeds, resulting in total loss. This is an extremely dangerous condition that occurred during normal driving.

Your intake manifold exploded and caught fire while you were getting a jump start, causing fuel lines to melt. The fire occurred in the engine bay of your 3.8L engine shortly after you purchased the vehicle. The manufacturer shows no open recalls for this issue. Resolving this will likely require replacing the intake manifold, fuel lines, and assessing any fire damage to surrounding engine components.

Your ABS and traction control lights are coming on, causing a grinding noise and your brakes to grab unexpectedly — making the car unsafe to drive. This has been happening for the last 5,000 miles and occurs while turning or braking on city streets and highways. You can't manually turn the traction control off; it activates on its own. The fix will likely involve diagnosing and repairing the ABS system, traction control module, or related brake components.

Your car was in two separate front-end accidents, but the front airbags failed to deploy in either crash. This is a serious safety issue since airbags are designed to protect you during head-on collisions. The airbag system will need to be diagnosed and repaired by a technician to determine why it didn't work.

Your headlights turn off completely after you switch between high beams and low beams multiple times. This happens repeatedly when you toggle between the two settings.

Your car's ignition lock isn't working properly, making it hard to start the vehicle. The security light came on, and you nearly got stranded. This could leave you and your family without a working car unexpectedly. The ignition lock cylinder will likely need to be replaced or repaired by a mechanic.

Your 225/60/R16 tires have a warped or slanted bead that prevents them from being installed properly on your wheels. This appears to be a manufacturing defect with the tires themselves. You'll need to replace the defective tires with new ones that have properly formed beads.

Your Chevy Impala has multiple issues that need attention: significant rust on the undercarriage, worn-out struts affecting suspension, and a failing oil pump. A repair shop recommended these fixes but then advised against bringing the car back. You'll likely need to address the rust damage, replace the struts, and replace the oil pump to keep your car running properly.

Your car's power steering system is leaking fluid, causing a whining noise that gets worse when you turn the steering wheel. The fluid level drops quickly—within 20-25 miles of refilling—forcing you to add more fluid repeatedly just to drive safely. Your husband suspects the power steering return hose may be rubbing against the engine or has developed a hole, but the exact leak location needs to be diagnosed by a mechanic.

Your engine is shutting off randomly while driving, turning, or stopped at red lights, and you have to shift into neutral and restart it multiple times before it starts again. The stalling happens unpredictably on city streets and highways, but not on interstates, and it's occurred many times. This could involve checking your fuel system, ignition system, or engine control module to identify why the engine is losing power.

Your power steering return hose is rubbing against part of the engine, which has worn a hole in the hose. This can cause power steering fluid to leak out, potentially leading to loss of power steering assist. The fix will likely involve repositioning or rerouting the hose and replacing it with a new one to prevent further rubbing.

Your car's security system randomly locks and prevents the engine from starting. This happens intermittently — every couple of times you try to start the vehicle, it won't turn over. The issue involves both the security system and the engine's ability to crank. A technician will likely need to diagnose the security system's wiring, sensors, and engine control module to find where the communication failure is occurring.

Your car won't start and displays a flashing security light. When you use the turn signal, you hear a loud buzzing noise and all dashboard lights flash on and off, including the gear shift labels and stereo. The dealership has replaced the body control module (BCM) and ignition switch, but the problem keeps recurring—the car starts intermittently but then fails to start again. This issue may require further diagnosis of the electrical system, possibly including the battery, alternator, starter motor, or additional BCM programming.

Your turn signals have been working on and off for 6 years. When you start from a complete stop, your transmission makes a squeaking noise, which started after you changed the fluid and filter for the second time. Your ABS (anti-lock braking system) stopped working 6 years ago. These issues may require diagnostics of the electrical system for the turn signals, transmission fluid and belt inspection for the squeaking, and ABS module repair or replacement.