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2004 Chevrolet Impala SS Problems
The intake manifold gasket may develop external engine oil leak. The manifold gasket will need to be replaced to correct this issue.
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 high pressure power steering hose will commonly leak fluid; it should be replaced.
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.
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.
The fuel pump may fail causing engine to stall and not restart.