Cadillac CTS-V 2004-2007 (Gen I) The Caddy with an Attitude...

Coolant Level Sensor Location

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Old 05-16-2013, 09:05 AM
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Default Coolant Level Sensor Location

Every time that I turn on my recently acquried V1 Cts-v, I get a message telling me to check the coolant level. I've checked it many times and after seeing that the level hadn't changed any of the times I looked at it, I decided to just keep an eye on my temperatures (which has also stayed in line).

I ran the service history of the vehicle and found out the radiator was replaced twice in it's lifetime. I've also inspected the radiator for leaks and have found nothing. My only remaining idea is to check the actual sensor. Does anyone know where it is located? I searched a few forums and the one thread that addressed the location had broken picture links.

Thanks in advance.
Old 05-16-2013, 09:09 AM
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Mine has come up a couple times in the last year...add a little, goes away.
Old 05-16-2013, 09:19 AM
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http://www.cadillacforums.com/forums...r-located.html
Old 05-16-2013, 10:00 AM
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I've found this post previously, but unless I'm missing something, there are no pictures. It says the attachment, but I'm not seeing any attachments.

Last edited by mcr205ls6; 05-16-2013 at 10:19 AM.
Old 05-16-2013, 10:13 AM
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I had my radiator out of the car a few months ago,didn't see any sensor in it,is it in the overflow/fill tank?
Old 05-16-2013, 11:09 AM
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its in the coolant res. youll see the connector on the right side of the res tank
Old 05-16-2013, 01:03 PM
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Originally Posted by punishmentcycle
its in the coolant res. youll see the connector on the right side of the res tank
Thank you.
Old 05-17-2013, 12:13 AM
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I think mine is crapping out too
Old 05-17-2013, 12:22 PM
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I haven't gone investigating it yet, but just to follow up on what FoD said, my coolant level is at the full mark. So between that and the fact that it isn't losing anything, I have to imagine that the sensor is toast.
Old 11-12-2014, 10:55 AM
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Old thread I know


I started getting the Check Coolant level. Anyone know the part # and did anyone get pictures of the location?
Old 11-12-2014, 08:11 PM
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It's on the reservoir. Only way to access the sensor is by removing the reservoir. It's not hard at all to do so. I think all I did was take the driver side wiper off. Removed the cowl trim. unbolt the master cylinder from the booster and move it aside. Fairly simple. Took me like 25-30 min to replace my reservoir.
Old 11-13-2014, 09:36 AM
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So you have to replace the whole reservoir or just the sensor?
Old 11-15-2014, 02:27 AM
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Originally Posted by JayBirdWs6
So you have to replace the whole reservoir or just the sensor?
I forgot to check when I got to work today. last I looked, it seems like the reservoir has to be replaced. I ended up buying a used one from LKQ for 35 bucks. You can find them new for 60-70 bucks.
Old 11-15-2014, 09:23 PM
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I think rock auto.com has the whole entire assembly for about 65 70 bucks
Old 11-17-2014, 07:38 PM
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Cool, Thank you guys



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