Question about 1993 GMC Suburban
Lower right hand side of engine block in front of the starter motor.
Posted on Oct 16, 2010
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Posted on Jan 02, 2017
Should be on the right side of the engine by the starter.Has a 1 wire connector.It does not go into the cooling system so you can just take it out without draining the coolant.Hope this helps.Good luck.
Posted on Jan 06, 2010
The knock sensors are under the intake plenum.There are 2 of them.You have to remove the intake plenum to get to the sensors.Hope this helps.Good luck.
Posted on Dec 17, 2009
SOURCE: 2003 GMC Yukon
You will have to remove the intake manifold to gain access to the knock sensors. There are two sensors in the valley under rubber plugs. The sensor in the rear has a tendency to fill up with water and cause trouble. You have to make a dam with RTV to stop the water from getting in there.
Posted on Sep 06, 2008
on my 1990 gmc its right be hind the starter its round and has a one wire plug becarful some have left hand treades and coolant willbe comn out i would do it while it was cold
Posted on May 31, 2009
the knock sensors are located below the intake plenum,or,upper intake manifold as some call it, they screw into the lower intake, the front one is sensor 1, the rear is sensor 2. it is wise to change both if you have some miles.since you are going to be buying a gasket set to do this job.the sensors are cheaper than the gaskets.
Posted on Jun 12, 2009
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