Low coolant level lbZ - Chevy and GMC Duramax Diesel Forum

06-07 LBZ & LLY Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 28 (permalink) Old 09-20-2013, 04:09 AM Thread Starter
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Low coolant level lbZ

I have an 07 lbz and about 2 months ago is when I noticed this problem. I started my truck and it flashed low coolant level. Went and checked my tank, added some, and was fine. Bout 3 weeks ago same problem happened. Went and looked and my cap was all clogged with black stuff. I'm guessing soot. So I went and bought a new cap. Last night same problem. Time to get this fixed. I ran truck for about 3 hours and let it sit overnight. Went and felt the upper hose and I could squeez it almost together. Went and unscrewed cap and released pressure and the hose was super super easy to squeeze. I have an egt blocker plate on my truck. Efi live, intake and exhaust. My truck leaks nothing.

Any ideas?
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post #2 of 28 (permalink) Old 09-20-2013, 04:11 AM
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Did you check the back passenger side of the blocm and see if any was leaking there? Thats where mine was and I didnt have a puddle or anything in the garage. It wasn't leaking out that fast though

06 lbz cclb
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post #3 of 28 (permalink) Old 09-20-2013, 04:16 AM
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sound like HG.

NEW TRUCK- 2006 LBZ cc/sb loaded southern coach, smoky mountain sportsman edition, 20" black hostile havoc's, 305/50/20 nitto trail grapplers, EFI LIVE by rob at ATP performance, 5" exhaust, transgo jr, egr blocked, pcv rerouted, isspro ev2 gauges, tinted windows, just gettin started!
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post #4 of 28 (permalink) Old 09-20-2013, 06:40 AM Thread Starter
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I had to add coolant 2 months ago and now again after 3 weeks.

I'm baffled.
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post #5 of 28 (permalink) Old 09-20-2013, 07:44 AM
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My heater hose was leaking, I had to keep adding it more and more. Try and get a compression test or whatever its called done

06 lbz cclb
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post #6 of 28 (permalink) Old 09-20-2013, 08:14 AM
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Dmax95,

I sorry you're having issues with your coolant levels. I would like to do research on your concern and offer my assistance. Could you please private message me your name, address, vehicle identification number, and current mileage?

Thank you,

Jessica L.
GM Customer Care
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post #7 of 28 (permalink) Old 09-20-2013, 08:54 AM Thread Starter
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Tripleturbo

Was it leaking on the ground?
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post #8 of 28 (permalink) Old 09-20-2013, 09:11 AM
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Quote:
Originally Posted by GMCustomerService View Post
Dmax95,

I sorry you're having issues with your coolant levels. I would like to do research on your concern and offer my assistance. Could you please private message me your name, address, vehicle identification number, and current mileage?

Thank you,

Jessica L.
GM Customer Care


LOL

I always find this type of post funny. These trucks there out of warranty from mileage and years. Hell I work for Gm had a driver side seat about made me crash the truck from the frame breaking dealer gave two shits about the safety issue there. Needs a set of injectors I think we can put that under the emissions warranty in good faith

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post #9 of 28 (permalink) Old 09-20-2013, 09:14 AM
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Pressure test and take a look. There are several places up top that can leak while driving and never leave a puddle while parked. Very likely source is the plastic quick-connects used on the heater hoses at the firewall.

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post #10 of 28 (permalink) Old 09-20-2013, 09:23 AM Thread Starter
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Alright. Ill have to find some place that will pressure test it. I'm sure hoping its not HG's.

Sometimes when I walk about the right side of my truck I smell a coolant smell, but not sure if that's normal or what.

I still don't know why that black crap is in there. I was told a EGR kit would fix that...
Damn smoke tune
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