knock sensor

2003 CHEVROLET IMPALA
144,000 MILES • 6 CYL • FWD • AUTOMATIC
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KWSTINE86
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How do you remove the knock sensor on the back side of a 2003 impala 3.8l the one closest to the fire wall do I need to drain the antifreeze and what special tool do I use because I can not get a socket to it.
Oct 23, 2010 at 9:57 PM
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BLUELIGHTNIN6
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This knock sensor is very difficult to replace. It is on the back/bottom of the engine next to the trans axle.

See the diagrams below for instructions on replacing it
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Oct 23, 2010 at 10:06 PM
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ZACCHEUS HOLT
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I need to replace the knock sensor on bank 2. But I have no idea how to remove it. The source between the oil pan and transmission is to tight to squeeze a socket through. Any ideas?
Oct 17, 2018 at 6:33 PM (Merged)
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HMAC300
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the transmission has to come out then drain cooling system. remove shield around it . I do not see any tips from mechanics. maybe if you got lucky and used an open end wrench from the side . Be sure not to over tighten if you do it destroys the sensor and you have to replace it again.
Oct 17, 2018 at 6:33 PM (Merged)