Chevy and GMC Duramax Diesel Forum - View Single Post - L5P Low coolant message
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post #5 of (permalink) Old 07-11-2018, 10:27 AM
redwngr
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Join Date: Feb 2011
Location: SW Ont
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Fill procedure is in the manual, but as above if it's only down a little just add some and it should self correct after a couple of heat/cool cycles.

Common to have to add a little to a new one.



What year is the truck?
How many miles/how long in service?

2018 GMC 2500 L5P CCSB 4x4 Denali - Mineral Metallic; previous '11 LML, '10 LMM and 04.5 LLY
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