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Old 04-11-2020, 07:47 PM   #5
carguy55

 
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Drives: 2018 1SS 1LE
Join Date: Feb 2017
Location: Austin, Texas
Posts: 1,487
Read all of that section on checking coolant and how to fill it. (I'm looking at the 2018 manual) main points:

If coolant is visible but the coolant level is not at or above the cold fill
line, add a 50/50 mixture of clean drinkable water and DEX-COOL coolant.

Then it shows the procedure for filling the top and bottom tanks and how much etc
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