"The coolant surge tank is divided into two sides. The pressurized side
(engine side) should be completely full, while the non-pressurized side
(fender side) will be significantly lower, depending on the operating
If you overfill, it will do no harm to the truck -- but it will push some out the overflow.
"The vehicle must be on a level surface. When the engine is cold, the coolant level should be at or above the MIN mark".
The MAX line is 'above' the min line.
If I was topping it up, I'd be adding to, or just above, the MAX line rather than just above the MIN line.
2018 L5P Sierra 4x4 SB Denali
Sold 2011 LML Sierra 4x4 CCSB SLT
Sold 2010 LMM Sierra 4x4 CCSB SLT
Sold 2004.5 LLY Sierra 4x4 ECLB SLE
Last edited by redwngr; 06-12-2019 at 06:31 PM.