Question about 2004 Chevrolet Impala
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Posted on Jan 02, 2017
SOURCE: knock sensor where is
There are two knock sensors one for each cylinder bank
Knock Sensor (Bank 1) (3.8L VIN K)On lower left side of engine, near starter.
Knock Sensor (Bank 2) (3.8L VIN K)On lower right side of engine. See Fig. 3
Posted on Nov 30, 2010
I have a 2002 Impala with 3.8L, and just replaced my Bank1 O2.
It is located between the firwall and the middle of the engine, straight down past the spark plugs. Maybe 12 inches from the top of the engine.
As I recall the plug for the sensor is clipped to a bracket at about spark plug level.
I recommend using the crow foot style wrench to remove and install.
Posted on Jan 07, 2011
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