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Old Jul 18, 2013 | 03:47 AM
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Default Name that sensor!

I just got an LQ4 out of an 02 Denali. I have all the sensors figured out but 1. Would anyone know what the sensor above the oil filter (about 6" above the filter) is? This is my first jump into fuel injection/computer controls so be gentle with the noob please!

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Old Jul 18, 2013 | 07:46 AM
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where is it mounted? on the pan, block, head?
The only thing that comes to mind above the filter would be an oil temp sensor on the cooler bypass fitting used on vettes.
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Old Jul 18, 2013 | 07:47 AM
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Its mounted in the block. I may go out in a bit and take a pic and post it.
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Old Jul 18, 2013 | 08:36 AM
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Originally Posted by Smokey626
Its mounted in the block. I may go out in a bit and take a pic and post it.
Most likely the crank sensor, but a picture would help us diagnose for sure.
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Old Jul 18, 2013 | 09:42 AM
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I'm pretty sure the crank sensor is the one by the starter. This sensor is on the other side, above the oil filter. Maybe 2 crank sensors? Here's the pic.
Attached Thumbnails Name that sensor!-p70600031.jpg  
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Old Jul 18, 2013 | 10:11 AM
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Originally Posted by Smokey626
I'm pretty sure the crank sensor is the one by the starter. This sensor is on the other side, above the oil filter. Maybe 2 crank sensors? Here's the pic.
Defiintely not a crank sensor, i had a brain fart for a second there. Looks like some type of coolant level or temp sensor. did it have a ECT sensor on the head?
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Old Jul 18, 2013 | 10:37 AM
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Oil temp?
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Old Jul 18, 2013 | 10:38 AM
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From Canada maybe? Those are the holes they use for the block heater.
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Old Jul 18, 2013 | 11:49 AM
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That is definately a block heater. I couldn't find a picture of a 6.0 with one but here is an LS4 with a block heater from the GM diagram.

http://parts.nalleygmc.com/images/pa...15MW01-047.JPG
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Old Jul 18, 2013 | 12:02 PM
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That's a threaded hole to the coolant jacket. Either a block heater like others have said. Or someone could have put an aftermarket temp sensor there. I used that hole for old school GM temp sensors in both my swaps.
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Old Jul 18, 2013 | 04:54 PM
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Aha, a block heater, very cool and makes sense since the donor vehicle was from northern Minnesota. There is a spot on the other side of the block as well that has a plug in it. I bow to your knowledge, I will definitely be hanging around!

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Old Jul 18, 2013 | 04:58 PM
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Oh yeah, there is an ECT on the driver side head near the front.
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Old Jul 19, 2013 | 12:42 PM
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Next question, where do I find the parts to hook the block heater back up?
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Old Jul 19, 2013 | 12:58 PM
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Looks like the old style brass 3 wire heater, so you'd need cord number 19116191. It's been discontinued from GM but you may be able to find one.

On the older ones that should be a cord direct from the heater in the block on one end and is a standard 3-pin 110v plug in on the other end, so I think that should be all you need.

Alternatively, you can just get the GM plug for the hole, leave that in there to plug the hole, or get the new style heater that goes in the hole along with it's corresponding cord.
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Old Jul 19, 2013 | 03:35 PM
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Ok, so am I understanding correctly that the dealership should be able to get this set up for me? Btw, you guys rock, thanks so much for the help so far!
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Old Jul 19, 2013 | 04:03 PM
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lol Never mind, just called the dealer and have a new cord in stock, been on the shelf "for years" and said I can have it for $15 and change!
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Old Jul 19, 2013 | 06:28 PM
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I always wondered why the coolant jacket drain plug was much bigger on the drivers side vs the passenger side. Interesting.
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