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Problems for specific Chevrolet Impala years:

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Newest reported 2003 Chevrolet Impala problems

 

Verified for the Chevrolet Impala

The mass air flow or crankshaft position sensor may fail causing the engine to intermittently stall. It may be necessary for the engine to cool down before it will restart.

41 Reports
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Verified for the Chevrolet Impala

The exhaust gas recirculation (EGR) tube which connects the EGR valve to the intake manifold may develop an engine vacuum leak, causing the Check Engine Light to illuminate with code P0171 and/or P0174 stored.

19 Reports
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Verified for the Chevrolet Impala

The engine may start and stall with the security light flashing. This is commonly caused by a failed passlock sensor which is part of the ignition lock cylinder. A secondary cause could be the ignition switch itself. Worn contacts inside the ignition switch can cause voltage drop issues which can affect the passlock system. Proper diagnoses should be performed before replacing any parts.

38 Reports
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Reported by charmin and 15 others for the Chevrolet Impala

if my car is parked on a hill and i have to put it in reverse it does a really hard jolt or a kick. while im driving it does it again around 30 mph and again around 60 mph. sometimes if im at a stop light it kind of jerks as i start to take off.

16 Reports
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Verified for the Chevrolet Impala

The intake manifold gasket can develop external engine oil or coolant leaks. In some cases the failed gasket will leak coolant internally. The manifold gasket will need to be replaced to correct this issue.

50 Reports
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Verified for the Chevrolet Impala

The crankshaft position sensor, ignition module, and/or powertrain control module (PCM) may fail resulting in illumination of the Check Engine Light with ignition system related fault codes stored in the PCM. Patience is necessary when dealing with this specific situation as normal diagnostic procedures are not effective. In many cases, the best option is to replace parts, one at a time until the fault is corrected.

5 Reports
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Verified for the Chevrolet Impala

The serpentine belt tensioner pulley may wear out. Our technicians tell us that in order to get a new pulley from General Motors you must purchase a complete belt tensioner assembly.

 

21 Reports
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Verified for the Chevrolet Impala

The catalytic converter may become plugged resulting in loss of engine power. General Motors has extended the catalytic convertor warranty on some models to 10 years or 120,000 miles. Please contact your local GM dealer to see if your vehicle is included.

7 Reports
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Verified for the Chevrolet Impala

The automatic transmission shifter may fail, or a wire may break near the shifter causing the ignition key to become stuck in the ignition lock cylinder.

167 Reports
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Verified for the Chevrolet Impala

The transmission pressure control solenoid may fail causing erratic shifting. Our technicians tell us that partial dis-assembly of the transmission is necessary to replace a failed pressure control solenoid.

182 Reports
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Verified for the Chevrolet Impala

The fuel pump may fail causing engine to stall and not restart.

13 Reports
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Verified for the Chevrolet Impala

The speedometer or other instrument panel gauge may begin to work erratically at times. Our technicians tell us that the instrument cluster must be sent to a repair facility to correct this fault.

95 Reports
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Verified for the Chevrolet Impala

The water pump may develop a coolant leak resulting in an engine overheating condition.

26 Reports
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Reported by pacrhat and 3 others for the Chevrolet Impala

Wiper arm came loose and would not turn during heavy snow storm. Fixed by pulling cap off nut holding arm down. Ensure arm in correct place and tighten down nut, then replace cap.

4 Reports
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Reported by pacrhat and 4 others for the Chevrolet Impala

DexCool antifreeze formed brown gel-like sludge, first observed at radiator cap. Supposed to last 100,000 miles. Lawsuit settled for cases where engine failed. Flushed system and replaced coolant. Keep air out of system by ensuring coolant reservoir always at proper level and check radiator periodically by removing cap.

5 Reports
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