2004 Chevrolet Impala SS Problems

RepairPal has identified the most common problems with the 2004 Chevrolet Impala SS as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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13
Known Problems

A Loose or worn gas cap may cause Check Engine Light to illuminate.

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.

You may be able to prevent transmission problems by servicing the transmission and inspecting the fluid every 30,000 miles. If the fluid is dark or burned then the transmission system should be completely flushed.

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.

 

The intake manifold gasket may develop external engine oil leak. The manifold gasket will need to be replaced to correct this issue.

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.

The EGR tube may develop an engine vacuum leak causing the Check Engine (SES) light to illuminate.

Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.

Contaminated brake fluid can cause problems in the brake system and it should be flushed every 60,000 miles.

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

The high pressure power steering hose will commonly leak fluid; it should be replaced.

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

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.